Adhesive bonding efficiency of concrete interfaces [texte imprimé] / Martin Brandtner-Hafner, Auteur . - 2023 . - p. 30-33.Bibliogr.Langues : Multilingue (mul)in ADHESION - ADHESIVES + SEALANTS > Vol. 20, N° 1/2023 (2023) . - p. 30-33

Catégories :	Chimie des surfacesEvaluationMatériaux cimentaires -- CollagePolymères
Index. décimale :	668.3 Adhésifs et produits semblables
Résumé :	In the construction industry, various polymeric adhesive systems are used for bonding concrete composites. The main focus is on structural safety at the interface between substrate and adhesive. To ensure a risk-adjusted selection of such systems, alternative holistic as well as empirical evaluation methods are needed, since standardized mechanical test methods are not suitable for this purpose.
Note de contenu :	- Methods - Reverse failure engineering - Adhesion bonding quality - Failures modes - Damage shielding - Adhesive bonding efficiency - Evaluation procedure - Fig. 1 : Setup principle of pull-off test for testing bonded concrete structures - Fig. 2 : Principle of reversed failure engineering based on holistic fracture analysis - Fig. 2 : Peer-safety portfolio of polymeric adhesive systems for bonded concrete structures - Table 1 : Evaluation adhesive bonding systems used on concrete interfaces
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Aerosol deposition for antiseptic coatings [texte imprimé] . - 2022 . - p. 40-41.Langues : Anglais (eng)in INTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 15, N° 2 (2022) . - p. 40-41

Catégories :	AntiseptiquesImplants médicauxMatériel médicalPeintures aérosolsRevêtements poudre
Index. décimale :	667.9 Revêtements et enduits
Résumé :	A Taiwanese company relies on an R&D equipment for the development of coatings for the medical market. The powder formulations used for this can be applied using the aerosol deposition method. The coatings produced in this way can be used for surgical implants and wound treatment.
Note de contenu :	- Coating equipment - Why aerosol deposition ? - Aerosol deposition - Fig. 1 : Equipment for the development of coatings for the medical market - Fig. 2 : Aerosol deposition : material particles are accelerated with the aid of a carrier gas and deposited onto the substrate
DOI :	https://doi.org/10.1007/s35724-022-0547-x
Permalink :	https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38567

An anti-corrosion coating with self-healing function of polyurethane modified by lipoic acid [texte imprimé] / Zhentao Cai, Auteur ; Chunping Li, Auteur ; Daquan Zang, Auteur ; Jin Li, Auteur ; Lixin Gao, Auteur . - 2023 . - p. 713-724.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 713-724

Catégories :	AnticorrosifsAnticorrosionCaractérisationEssais de résiliencePolyuréthanesRayuresRevêtement autoréparantRevêtements organiquesRevêtements protecteursSpectroscopie d'impédance électrochimique
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Polyurethanes (PUs) are a polymer material with a wide range of applications and excellent mechanical properties. In this work, a modified polyurethane coating with the self-healing function is developed via the reaction between polytetrahydrofuran (PTMG), 2,4-toluene diisocyanate (TDI) and α-lipoic acid. The coatings are characterized by SEM and FTIR. The protection of the prepared coating for copper in 3 wt.% NaCl solution is investigated by the electrochemical measurements and the surface self-healing tests. The coating has stable protection from corrosion of the copper substrate in corrosive medium and shows a good self-healing ability. The healing behavior in morphology and corrosion resistance can be observed when heated above 60°C.
Note de contenu :	- Table 1 : The EIS parameters of copper electrodes with different coatings in 3 wt.% NaCl solution - Table 2 : Polarization curve fitting parameters of the coated electrodes immersed in 3 wt.% NaCl solution for 12 days
DOI :	https://doi.org/10.1007/s11998-022-00703-0
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00703-0.pdf?pdf=button% [...]
Format de la ressource électronique :	Pdf
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An introduction to different plastics and approaches to coating them [texte imprimé] / Paul Sheppard, Auteur . - 2023 . - p. 28-37.Bibliogr.Langues : Anglais (eng)in SURFACE COATINGS INTERNATIONAL > Vol. 106.1 (01-02/2023) . - p. 28-37

Catégories :	Energie de surfaceMatières plastiquesMatières plastiques -- RevêtementMesureTension superficielleTraîtements de surface
Index. décimale :	667.9 Revêtements et enduits
Résumé :	This article explores the different types of common plastics and materials that require coating, the typical issues faced, and the various types of pretreatments required for successful results. There are many types of plastic to consider, and this article will discuss the differing approaches needed to achieve adhesion to the chosen substrate. One common description of plastic is "a polymeric material that has the capability of being moulded or shaped, usually by the application of heat and pressure". The word plastic was first used in the English language in the 1630s as an adjective meaning "capable of shaping or moulding a mass of matter" from the Latin plasticus, and from the Greek plastikos meaning to"grow"orlorm". The word evolved from its adjective meaning and started to be used as a noun in the early 20th century, and used in this sense to describe Bakelite, commonly considered as the world's first entirely synthetic plastic. The plastics industry has a long and rich history that dates back further than you may think; the Horners Company of London were first mentioned in 1284 with horn and tortoiseshell considered as natural plastics, used to produce all manner of products from combs to piano keys and billiard balls. By the middle of the 19th century, some animal-derived materials were in short supply leading to species, such as turtles and elephants, facing extinction due to increasing demand for tortoiseshell and ivory. Industrialists realised the scale of this environmental and economic problem and set about inventing new semi-synthetic materials based on chemically modified natural substances, such as cork, milk and even blood. Semi-synthetic materials made way to fully man-made materials, such as Bakelite, invented in 1907 by Belgian chemist Leo Baekeland. In 1920 Hermann Staudinger proved the existence of polymers, in doing so creating a new industrial field of chemistry. Now, the term polymer can be used to describe any plastic and other naturally occurring organic compounds, such as DNA. In the early decades of the 20th century, the chemical and petroleum industries began to form alliances, driven by the desire to make use of by-products created by processing crude oil and natural gas. Some of these companies are recognisable and supply the coatings industry today, such as BASF, Dow and DuPont. The post-war consumer boom, driven by affordable products made from differing plastics, also spurred development in this field, but discerning consumers also wanted decorative effects and functionality, so coatings would have to be used. Although many plastics are coloured by masterbatch additives or fully pigmented, there are many applications that require the use of coatings, but as will be explained many plastics can be difficult to coat successfully without a certain level of preparation.
Note de contenu :	- DIFFERENT TYPES OF PLASTIC : Thermosets - Thermoplastics - Polyethylene terephthalate - Polyethylene (PE) - Polyvinyl chloride (PVC) - Low-density polyethylene (LDPE) - Polypropylene (PP) - Polystyrene (PS) - Acrylonitrile-butadiene-styrene (ABS) - GRP and carbon fibre - Polyamide - Polycarbonate - Polylactic acid - Poly(methyl methacrylate) - Polyoxymethylene - Polyurethane - Styrene acrylonitrile - WHY ARE PLASTICS DIFFERENT COMPARED TO OTHER SUBSTRATES ? - SURFACE ENERGY AND SURFACE TENSION : Dispersive and polar surface energy - Measurement - SURFACE TENSION - SURFACE PRETREATMENT : Flame treatment - Corona treatment - Plasma treatment - Ozone treatment - Table : Typical values of surface energy or surface tension for different materials
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Artificial neural network modeling of tablet coating in a pan coater [texte imprimé] / Assia Benayache, Auteur ; Lynda Lamoudi, Auteur ; Kamel Daoud, Auteur . - 2023 . - p. 485-499.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 485-499

Catégories :	CaractérisationComprimésEnrobage pharmaceutiqueEthylcelluloseMatériaux -- EpaisseurRéseaux neuronaux (informatique)Revêtements organiques
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Our study decided to use the new and revolutionary approach in the field of pharmaceutical coating processes called the artificial neural network (ANN) by using the neural networks toolbox derived from the Matlab® software. The experiments were performed using tablets of Alfuzosin Chlorhydrate as a model filler, and an aqueous solution of Surelease as a polymer in different contents. The various parameters that can affect coating thickness, weight gain, and the coefficient of variation CV, such as spray rate, air pressure, solid content, speed of the drum, pan loading, and time of coating, were studied. The properties of the coated tablets were evaluated using the ANN, and both the parameters of the coating process and the properties of the coated tablets were used as a basis for optimization, as well as the choice of the optimal structure of the ANN model. It was found that the best neural network architecture had 7 neurons in the hidden layer, with a mean square error of 3.515 and a determination coefficient of nearly 1. The relative importance of each independent variable was quantified using the Garson equation. In this study, spray rate was found to have the highest impact on the properties of tablets.
Note de contenu :	- MATERIALS AND METHODS : Characterization of core tablets - Coating dispersion - Coating process - Characterization of the coating solution - Characterization of coating tablets - RESULTS AND DISCUSSION : Model architecture and prediction - Relative importance of input variables - The influence of parameters on the properties of coating tablets - Optimization of coating tablets - Table 1 : Effect of solids concentration on the viscosity, density, and surface tension of coating fluids measured coating - Table 2 : Variable parameters - Table 3 : ANN model's weight and bias matrix - Table 4 : Effects of coating parameters on the relative standard deviation at the final process stage - Table 5 : Ideal values of inputs, predicted and experimental values of outputs
DOI :	https://doi.org/10.1007/s11998-022-00683-1
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00683-1.pdf?pdf=button
Format de la ressource électronique :	Pdf
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Automatic of the pan [texte imprimé] / Frank Reiter, Auteur . - 2022 . - p. 20-22.Langues : Anglais (eng)in INTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 15, N° 2 (2022) . - p. 20-22

Catégories :	Ateliers de peinture industrielleAutomatisationMétaux -- Revêtements:Métaux -- PeinturePoêles -- PeintureRobots industriels
Index. décimale :	667.9 Revêtements et enduits
Résumé :	As one of the leading manufacturers of high-quality cookware, Fissler is globally well known. The company develops its innovative coatings itself and also applies them to the products. Robots help with this. In the new facility, frying pans made of aluminium and stainless steel with a high variance are coated fully automatically.
Note de contenu :	- Fully automatic coating line - Tests in advance - Various paint systems and processes - Application with process control - Robotics with innovative programming - Material supply with adaptations - Automatic programme and material change - Control technology - Fig. 1 : Active painting in the paint booth for exterior coating - Fig. 2 : Dosing technology with Coriolis flow meter - Fig. 3 : Configurator for interior coating - Fig. 4 : Material supply to booth on trolley
DOI :	https://doi.org/10.1007/s35724-022-0540-4
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A better fit for exterior wood coatings : Specialized wet cup method to measure water-vapour permeability [texte imprimé] / Niels Lutke Schipholt, Auteur ; Mathilde van't Oor, Auteur . - 2023 . - p. 22-26.Bibliogr.Langues : Anglais (eng)in EUROPEAN COATINGS JOURNAL (ECJ) > N° 5 (05/2023) . - p. 22-26

Catégories :	Applications extérieuresBois -- Revêtements protecteursPerméabilitéPolyacryliquesPolyalkydesRevêtements en bâtiment:Peinture en bâtimentVapeur d'eau
Index. décimale :	667.9 Revêtements et enduits
Résumé :	There is growing interest in the water-vapour permeability of exterior wood coatings as a performance specification to help predict moisture transfer. Buildings are increasingly more airtight and better insulated which makes it important to assess the risk of internal condensation. Current test methods to measure the water-vapour permeability of coatings are not a good fit for wood coatings. A new wet cup test method could be the solution.
Note de contenu :	- Experimental - Coating calculation - Variation in µ-value from edge leakage and dry film thickness measurement - Method repeatability greater than required by standard - Acrylic and alkyd systems have different permeability - Strong benefits in assessing wood coating wvp - Table 1 : Results of the analysis of edge losses for wet cups sealed with butyl tape - Table 2 : Repeatability results for Norway spruce reference discs (uncoated) along with samples with acrylic 4, acrylic 3 and alkyd emulsion 1
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Biofilm inhibiting nanocomposite coatings on stainless steel surgical instruments : a possible strategy to prevent TASS [texte imprimé] / Birru Bhaskar, Auteur ; Ramay Patra, Auteur ; K. R. C. Soma Raju, Auteur ; V. Nagarjuna, Auteur ; Susmita Chaudhuri, Auteur ; R. Subasri, Auteur ; Prashant Garg, Auteur . - 2023 . - p. 559-572.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 559-572

Catégories :	Acier inoxydableBiofilms -- AnalyseCaractérisationDodécyl sulfate de sodiumLe laurylsulfate de sodium (LSS) ou dodécylsulfate de sodium (SDS) est un détergent et tensioactif ionique fort, couramment utilisé en biochimie et biologie moléculaire. C'est un composé à ne pas confondre avec le laureth sulfate de sodium. La concentration micellaire critique du SDS varie de 0,007 à 0,01 mol/L dans l'eau à 25°C. Le dodécylsulfate de sodium (en anglais, Sodium Dodecyl Sulfate ou SDS ou/ NaDS), de formule C12H25NaO4S, aussi connu sous le nom de laurylsulfate de sodium (en anglais, sodium lauryl sulfate ou SLS), est un tensioactif ionique qui est utilisé dans les produits ménagers tels que les dentifrices, shampooings, mousses à raser ou encore bains moussants pour ses effets épaississants et sa capacité à créer une mousse, il est également repris comme additif alimentaire par le codex alimentarius (E487). La molécule est composée dÂ’une chaîne de 12 atomes de carbone, rattachée à un groupement sulfate conférant à la molécule les propriétés amphiphiles requises pour un détergent. Le SDS est préparé par sulfonation du dodécanol (alcool de lauryl, C12H25OH), suivie par une neutralisation par du carbonate de sodium. Le SDS est utilisé aussi bien dans les procédés industriels que pour les produits cosmétiques destinés au grand public.EndotoxinesInhibition microbienneMatériaux hybridesMateriel chirurgicalPince de LimsPolyacrylamideLe polyacrylamide est un polymère (-CH2-CH(-CONH2)-) formé à partir d'acrylamide. Il peut être réticulé en incorporant dans le mélange de polymérisation un dérivé bi-fonctionnel de l'acrylamide : le N,N'-méthylène-bis-acrylamide (CH2=CH-CO-NH-)2CH2. Le polyacrylamide, contrairement à l'acrylamide qui est neurotoxique, n'est pas toxique mais il doit être manipulé avec précaution car il peut contenir des résidus d'acrylamide. c'est un gel hautement absorbant. Sous forme de poudre, il se dilue dans l'eau pour former un gel visqueux après agitation vigoureuse. Des substances ioniques telles le sel permettent au polyacrylamide de libérer les substances absorbées. L'intérêt de ce polymère peut être apprécié dans son caractère de fluide non newtonien, et constitue un bon exemple d'application de l'effet Weissenberg: le fluide, soumis à l'action d'un agitateur magnétique remonte au centre du récipient au lieu de se plaquer sur les côtés, comme l'aurait fait un fluide newtonien classique, comme l'eau.Polymères en médecineRevêtements organiquesSyndromes toxiques du segment antérieurLe syndrome toxique du segment antérieur (TASS pour les Anglo-Saxons) est une réaction inflammatoire stérile liée à la pénétration accidentelle de substances toxiques non infectieuses au sein du segment antérieur de lÂ’Âœil lors dÂ’un acte chirurgical. Le tableau clinique initial est souvent indiscernable ou très proche dÂ’un tableau dÂ’endophtalmie infectieuse. Le TASS survient dans la plupart des cas 12 à 72 heures après la chirurgie de la cataracte. LÂ’inflammation de segment antérieur est en général assez sévère, associée à un hypopion. Les dommages endothéliaux sont fréquents, à lÂ’origine dÂ’un Âœdème de cornée diffus. Il nÂ’existe pas dÂ’inflammation du segment postérieur. Les résultats microbiologiques sont négatifs. Les causes de TASS sont nombreuses, variées et difficiles à individualiser. Tout matériel ou substance introduit dans lÂ’Âœil en peropératoire ou en postopératoire immédiat est susceptible d’être impliqué. Les principales étiologies connues comprennent : les conservateurs, les résidus de visqueux présents au niveau des dispositifs réutilisables, les endotoxines bactériennes et les implants intraoculaires. Le TASS étant initialement indiscernable dÂ’une endophtalmie infectieuse, il est en général diagnostiqué et traité à la phase aiguë comme une infection. Les anomalies inflammatoires régressent dans la plupart des cas sous traitement anti-inflammatoire corticoïde local, mais une hypertonie intraoculaire et/ou un Âœdème de cornée chroniques peuvent persister, résultant dÂ’une atteinte trabéculaire ou endothéliale irréversible. (Journal Français d'Ophtalmologie Volume 34, N° 1, Janvier 2011, Pages 58-62)
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Toxic anterior segment syndrome (TASS) is an inflammation that occurs after anterior segment surgeries, and is widely seen in the patients after cataract surgery. The main cause of TASS is postulated to be the bio-residue and heat stable endotoxins which persist on the used forceps even after autoclave sterilization, some of which are known to cause inflammation. In this work, initially, a detailed characterization of bio-residue composition before and after autoclave sterilization of the forceps used in ophthalmic surgeries was carried out by Fourier-transform infrared spectroscopy (FTIR) and gas chromatography mass spectrometry (GCMS) techniques. The morphological features of biofilm before and after autoclave were also examined using a field emission scanning electron microscope (FESEM). Subsequently, two biofilm inhibiting nanocomposite coating formulations which were earlier developed by us were deposited on stainless steel 420 coupons to mimic surgical instruments. Biofilm inhibition was studied for bare and coated substrates after autoclaving using crystal violet staining as well as by FESEM analysis. It was observed that the coated substrates prevented biofilm formation even after autoclaving. The results of this study demonstrate that the biofilm inhibiting coatings prevent formation of biofilm and hence, prevent deposition of bioresidues on stainless steel surgical instruments. Due to this, the coated surgical instruments are safe to use even after autoclaving and cannot be expected to cause any inflammatory responses after surgeries, thereby preventing TASS.
Note de contenu :	- MATERIALS AND METHODS : Materials - Bacterial inoculum preparation - Biofilm formation on surgical instruments (Lims forceps) and SS 420 substrates - Biofilm quantification - Biofilm morphology analysis using field emission scanning electron microscopy (FESEM) - Sodium dodecyl-sulfate polyacrylamide gel electrophoresis (SDS-PAGE) analysis - Fourier transform infrared (FTIR) analysis - Gas chromatography mass spectrometry (GCMS) analysis - Nano composite sol synthesis and deposition on SS 420 substrates - Water contact angle (WCA) and roughness measurement on bare, IH and HC coated SS 420 - Microstructure analysis of nanocomposite coatings before and after autoclave - Biofilm inhibition study on bare, IH and HC coated substrates after autoclave - RESULTS : Biofilm formation on stainless steel coupons - Biofilm formation on Lims forceps - Biofilm morphology on LFSE, and LFWE before and after sterilization - FTIR and GCMS results - WCA and roughness measurement on bare, IH and HC coated SS 420 - Microstructure analysis of coatings before and after autoclave - Biofilm inhibition study on bare, IH and HC coated substrates after autoclaving - DISCUSSION : Biofilm analysis by FESEM, GCMS and FTIR - Effect of autoclaving on biofilm inhibition and biofilm inhibiting coatings on SS coupons - Table 1 : Major band obtained from the FTIR spectra of biofilm before and after autoclave - Table 2 : Chemicals in bioresidue after autoclave sterilization of used Lims forceps through GCMS analysis
DOI :	https://doi.org/10.1007/s11998-022-00-689-9
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00689-9.pdf?pdf=button% [...]
Format de la ressource électronique :	Pdf
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Co-blending, phosphate inhibitors for sustainable, low-cost corrosion control [texte imprimé] / Ella Newington, Auteur . - 2022 . - p. 27-29.Bibliogr.Langues : Anglais (eng)in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4676 (08/2022) . - p. 27-29

Catégories :	AnticorrosifsAnticorrosionCoût -- ContrôleEssais de brouillard salinInhibiteurs (chimie)Mélanges (chimie)Métaux -- Revêtements protecteursPhosphatesPrimaire (revêtement)
Index. décimale :	667.9 Revêtements et enduits
Résumé :	The author discusses how, with independent research and industry testing, Intelli-ion works synergistically with phosphate-based systems to offer environmental and cost benefits. As professionals working within the coatings industry, we are all acutely aware of the issues that corrosion poses and want to provide our customers and end-users with the best quality products to tackle this US$2,2trn global issue'. Anti corrosion coatings have become a necessity for industries to safeguard the huge investments they make in terms of money, property and safety of workers. Whether coating to protect pipelines, aeroplanes or computer gadgets - customers are united in their battle against corrosion ! Historically, some of the most effective corrosion inhibitors have been based on chromium. However, these chemistries are currently being phased out globally - leaving a gap in the market for a highly effective inhibitor that is non-toxic and non-carcinogenic. Following strong R&D efforts and lengthy extended testing, many coatings companies have turned to phosphate-based systems. This article highlights a step-change alternative that can save 10-30 % on the cost of anti-corrosives as well as offering customers more sustainable coatings that require no hazard warning label.
Note de contenu :	- WHY PHOSPHATES ARE POPULAR - WHY PHOSPHATE "CO-BLENDS" ARE BETTER : Innovative and trusted technology working together - Removal of toxic warning labels from packaging - Anticorrosive costs savings - EVIDENCE OF INTELLI-ION & PHOSPHATE COMPATIBILITY : Independent academic research at Swansea University wales - Industry-standard salt-spray testing - Fig. 1-3 : Depict the protection mechanism of a co-blended primer coating following the detection of corrosive ions - Fig. 4-5 : Demonstrate Dr. Phit Ansett's independent research aimed at understanding the relationship between Intelli-ion and ZnP - Fig. 6-7 : Demonstrate industry standard salt spray testing (ASTM 8117) of phosphate-based systems left vs Intelli-ion
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Coatings specialists work with galleries and muesums to protect valuable artwork [texte imprimé] / Kathryn Wortley, Auteur . - 2022 . - p. 46-47.Bibliogr.Langues : Anglais (eng)in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4676 (08/2022) . - p. 46-47

Catégories :	GraphèneLe graphène est un cristal bidimensionnel (monoplan) de carbone dont l'empilement constitue le graphite. Il a été isolé en 2004 par Andre Geim, du département de physique de l'université de Manchester, qui a reçu pour cette découverte le prix Nobel de physique en 2010 avec Konstantin Novoselov. Il peut être produit de deux manières : par extraction mécanique du graphite (graphène exfolié) dont la technique a été mise au point en 2004, ou par chauffage d'un cristal de carbure de silicium, qui permet la libération des atomes de silicium (graphène epitaxié). Record en conduction thermique jusqu'à 5300 W.m-1.K-1. C'est aussi un matériaux conducteur.Objets d'art -- Conservation et restaurationOeuvres -- PeinturesRevêtements -- Effets de la lumière:Peinture -- Effets de la lumièreRevêtements protecteurs
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Museum and gallery professionals have long considered light a double-edged sword — vital to effectively showcase art, yet with the potential to destroy it — but recent innovations in paints and coatings could change that view. Determining the degree of potential light damage on a painting is challenging, according to the US-based Conservation Center for Art & Historic Artifacts, due to the impact of a wide range of factors such as light intensity and type, total time of exposure and the natural resistance of the painting's components. Museums Galleries Scotland, the national development body for the museum sector in Scotland, recommends illuminating very sensitive objects, including watercolours, at 50 lux (1 lux equates to 1 lumen per square metre), which is just "enough to see the shape and colour of an item", it said in a note. Moderately sensitive items, such as oit paintings, can accept 200 lux. But with one standard bulb emitting about 1600 lux, according to the US Department of Energy, and direct sunlight radiating about 32,000-100,000 lux', these recommendations require measures to reduce not only visible light (400-760nm) but also the other two main parts of the light spectrum: infrared radiation (longer than 760nm) and ultraviolet (UV) radiation (shorter than 400nm). UV radiation, which Museums Galleries Scotland says is "the most damaging form of light to museum collections," is emitted from sunlight as well as fabricated fluorescent and traditional tungsten light bulbs.
Note de contenu :	- Protect with graphene - Protective coatings - Replicated artwork
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Constructing robust and magnetic PU sponges modified with Fe3O4/GO nanohybrids for efficient oil/water separation [texte imprimé] / Dongdong Ge, Auteur ; Yun Zhang, Auteur ; Zhenshan Cui, Auteur ; Guilong Wang, Auteur ; Jun Liu, Auteur ; Xiaomeng Lv, Auteur . - 2023 . - p. 661-670.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 661-670

Catégories :	Absorbants et adsorbantsCaractérisationEpongesHydrophobieMatériaux magnétiquesNanoparticulesOxyde de ferOxyde de graphènePolyuréthanesRugosité
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Metal oxides, due to their low cost, environmental friendliness and wide sources, have attracted great attention. We chose iron oxide/graphene oxide (Fe3O4/GO) nanohybrids to modify a PU sponge to increase the surface roughness of the sponge without damaging its inherent structural properties. The composite was then treated with octadecane thiol to reduce the surface energy and produce a superhydrophobic and oleophilic absorption material with a water contact angle of 157°. From the absorption experiment with simulated oily water (including diesel oil, lubricating oil, rapeseed oil, chloroform, N,N-dimethyl formamide, tetrahydrofuran, ethanol and acetone), it was found that the Fe3O4/GO-modified PU sponge could absorb up to 80–170 times its own weight while showing outstanding recyclability achieved by squeeze/absorption cycles. Moreover, the composite absorption material exhibited weak magnetic properties, suggesting its recycling practicability. These results provide a quick and simple strategy to deal with oil spills and chemical leakage.
Note de contenu :	- EXPERIMENTAL SECTION : Preparation of Fe3O4/GO nanohybrids - Synthesis of the M-PU sponge - RESULTS AND DISCUSSION : Processing of the PU sponge - Characterization of the Fe3O4/GO nanohybrids - Morphology and wettability of the M-PU sponge - Application of the M-PU sponge as an absorbent - Table 1 : The magnetism values of the Fe3O4/GO nanohybrids (a); M-PU sponge (b)
DOI :	https://doi.org/10.1007/s11998-022-00699-7
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00699-7.pdf?pdf=button% [...]
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Design of experiment for coatings [texte imprimé] / Albert Rössler, Auteur . - Hannover (P.O. Box 62 47, 30062, Germany) : Vincentz Network GmbH & Co., 2014 . - 168 p. : ill. ; 27 cm. - (European Coatings Library) .ISBN : 978-3-86630-885-5 : 139 EIndex - Bibliogr.Langues : Anglais (eng)

Catégories :	Plan d'expérienceRevêtements:Peinture
Index. décimale :	667.9 Revêtements et enduits
Résumé :	THE MISSION : A concise, yet comprehensive and readily accessible overview of the effects and benefits of applying statistical design of experiments (DOE) to the development of coatings, backed up by practical examples in a book that does not over-load the reader with statistics and mathematics. Essential for anyone who needs to efficiently develop and forrnulate coatings. THE AUDIENCE : Students and professionals wishing to gain a solid understanding of coatings development using design of experiments (DOE), as well as experienced coatings formulators seeking to immerse themselves in this area with a view to leveraging its huge potential and being even more effective in their development work. THE VALUE : Statistical design of experiments explained in practical terms. The book starts with a concrete example taken from the paint lab. This is followed by an overview of the methods comprising the design of experiments, so that you have everything at your linger tips when choices have to be made in practice. A further chapter deals with data analysis. Sonne common commercial software solutions are then described. In short : everything you need to dive into the topic quickly and efficiently and to start using DOE straight away.
Note de contenu :	1. Design of experiments - systematic mania ? 2. Planning is essential - a lot helps a lot 3. Number-crunching - nothing ventured, nothing gained in data analysis 4. Parametric optimization and sensitivity analysis finding a needle in the haystack - DoE-Software - do not develop the wheel once more - APPENDIX 1 - Precision, trueness and accuracy - Appendix 2 - Location and spread parameters - Appendix 3 - Normal distribution - Appendix 4 - Confidence intervals - Appendix 5 - Hypothesis, tests and conclusions - statistical tests - Appendix 6 - Three component diagrams - Appendix 7 - Linear regression - Appendix 8 - Failure mode and effect analysis, FMEA - Appendix 9 - General references
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Development of erosion equations for removal of organic coating on carbon fiber reinforced polymer surface by plastic abrasive [texte imprimé] . - 2023 . - p.671-685.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p.671-685

Catégories :	AbrasifsComposites à fibres de carboneEquationsMatériaux -- Détérioration par érosionModèles mathématiquesPolyuréthanesPrévision, Théorie de laRevêtements organiques
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Erosion equations were developed to predict the material removal of polyurethane coatings on carbon fiber reinforced plastic (CFRP) surfaces and validated through experimental data. The effects of abrasive properties, process parameters, and organic coating properties (such as fracture toughness and hardness) were considered in the equations. As the erosion angle increased, elastoplastic deformation in the oblique direction and repeated "deformation" in the normal direction were the main reasons for material removal. The ductile erosion behavior was confirmed by experimental data because the maximum erosion rate occurred at an incident angle of 30°. The coefficient and index in the equations were determined by experimental data, and the equations were verified. The developed equations could accurately predict the quantity loss of organic coatings under different particle sizes and particle velocities, and the erosion equations were in good agreement with the experimental data.
Note de contenu :	- DEVELOPING EROSION EQUATIONS : Modeling of plastic deformation mechanism - Particle rotation analysis - EXPERIMENTAL DETAILS : Abrasive particles and substrate - Coating system - Experimental procedure - RESULTS AND DISCUSSION : Determination of abrasive initial velocity index b - Determination of the coefficient f - Determination of coefficient C C - Determination of coefficient C D - Comparison of the model prediction with experiment - Effect of abrasive particle size - Effect of coating characteristics - Table 1 : Key property indexes of the abrasive - Table 2 : Properties of continuous carbon fiber reinforced plastic composite - Table 3 : Related properties of polyurethane coating - Table 4 : Detailed coating removal experimental conditions - Table 5 : Model coefficients for fatigue index c
DOI :	https://doi.org/10.1007/s11998-022-00700-3
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00700-3.pdf?pdf=button% [...]
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Efficiency for clean springs ready to coat [texte imprimé] . - 2022 . - p. 42-43.Langues : Anglais (eng)in INTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 15, N° 2 (2022) . - p. 42-43

Catégories :	RessortsTraitement de surface par impactTraîtements de surface -- Appareils et matériels
Index. décimale :	671.7 Finissage et traitement des surfaces
Résumé :	In a newly installed production line for compression springs, a customised tumble belt blast machine ensures clean surfaces ready for coating in short cycle times. Ingressed oil is neutralized and, through the media cleaning system, separated from the blast media.
Note de contenu :	- Shot blasting solution for new production - Equipped for short cycle times and clean results
DOI :	https://doi.org/10.1007/s35724-022-0548-9
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Enhancing surface durability with antimicrobial coatings [texte imprimé] / James Rapley, Auteur . - 2022 . - p. 23-25.Bibliogr.Langues : Anglais (eng)in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4676 (08/2022) . - p. 23-25

Catégories :	AntimicrobiensFormulation (Génie chimique)Revêtements -- Industrie et commerceSurfaces -- Nettoyage
Index. décimale :	667.9 Revêtements et enduits
Résumé :	The author discusses the market for and development of antimicrobial coatings. The need for durable and more environmentally friendly solutions for coating materials has been shaping the coatings industry for many years. Consumers from various markets, including the construction trade and automotive manufacturing, want coatings that enhance the resilience of surfaces to stains, dirt, and mildew. However, even with the addition of protectants and decorative paints or lacquers, microbes are still able to adhere to a surface, where they can multiply rapidly. Their uncontrolled growth and spread as a result of contact, environmental conditions or inadequate cleaning (Figure 1) can then lead to unpleasant consequences, including spoilage, stains, nasty odours and a reduction in the usable lifetime of a product due to contamination or biodegradation. There are a number of treatments that consumers can use to help reduce the growth and spread of microbes on surfaces, and using them regularly is essential. However, standard cleaning products often have limited residual activity, meaning that they stop working once they dry. This can allow surfaces to become quickly re-contaminated by contact or airborne sources, which is a particular concern for high-touch points such as countertops and doors. Antimicrobial technologies in coatings can help to address these challenges by effectively creating a protective layer that keeps surfaces cleaner and fresher for longer. This 'always on' protection works around the clock to help prevent the growth of microbes on a surface for the lifetime of the coating, without washing or wearing away. For just a minimal cost, this universel lifetime preventative measure provides the perfect complement to standard routine cleaning practices, employing a multi-defence strategy against the growth of microbes to improve overall surface cleanliness.
Note de contenu :	- A growing market - Developing antimicrobial coatings : Choosing the right antimicrobial - Compatibility - Application - The future is cleaner - Fig. 1 : Example of surfaces that are susceptible to microbial growth - Fig. 2 : Choosing an antimicrobial that is compatible with the coating is essential. Left: polyurethane chemistry mixed with an incompatible antimicrobial leads to visuat defects after drying. Right: turnkey coatings are compatible with a wide range of chemistries and have minimal visual impact - Fig. 3 : Current powder or pre-dispersion coating manufacturing process - Fig. 4 : Liquid, dispersion, powder and turnkey coating before and after 72 hours has elapsed. Precipitation and agglomeration start to occur after 72 hours ; the turnkey coating solution remains stable - Fig. 5 : Fully integrated antimicrobial technology in coatings
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Facile preparation of anticorrosive and decorative multifunctional coatings via the inclusion of pearlescent oxide-covered mica pigments [texte imprimé] / Walaa M. Abd El-Gawad, Auteur ; Essam A. Mossalam, Auteur ; Mohamed M. Selim, Auteur . - 2023 . - p. 603-622.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 603-622

Catégories :	AnticorrosifsAnticorrosionArrachement (matériaux)Brillance (optique) -- MesureCaractérisationColorimétrieEpoxydesEvaluationFormulation (Génie chimique)MicaOxydes métalliquesPigments nacrésRevêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniquesRevêtements décoratifsRevêtements décoratifs:Peinture décorativeRevêtements organiquesRevêtements protecteurs
Index. décimale :	667.9 Revêtements et enduits
Résumé :	The keynote of this work was to prepare cost-saving intensely colored pearlescent pigments with anticorrosive properties via deposition of a low ratio of expensive mixed oxides on mica to be applied in decorative and anticorrosive multifunctional coatings. Herein, a mixture of CeO2 and Fe2O3 was precipitated on mica to prepare anticorrosive pigment with golden color, while brilliant intensive orange pigment was prepared via the deposition of ZrO2.Fe2O3 mix on mica. The prepared pearlescent pigments based on mica flakes covered with CeO2.Fe2O3 and ZrO2.Fe2O3 were characterized using scanning electron microscopy, energy-dispersive X-ray analysis, X-ray fluorescence, and thermal gravimetric analysis. The mixed oxide-covered mica pigments (Ce-Fe@M and Zr-Fe@M) were applied in two paint formulations in addition to one formulation containing mica for comparison. The color of the resulting coatings was investigated utilizing the CIELab technique. Additionally, the inhibitive properties of the coatings were determined using potentiodynamic anodic polarization, open circuit voltage, linear polarization resistivity, and electrochemical impedance spectroscopy techniques. The results declared that the color of the coating containing CeO2.Fe2O3@M is gold and that of ZrO2.Fe2O3/M is brilliant orange. Moreover, the results deduced that the resistance of coating containing Ce-Fe@M ranged between (5061–4887 Ω) and that containing Zr-Fe@M is from 6846 to 3290 Ω, while coating based on mica is the least. These results revealed that the present study has succeeded in offering both anticorrosive and decorative functions in a single-layered coat.
Note de contenu :	- EXPERIMENTAL : Materials - Characterization of the prepared pigments - Application in coatings - Methods of testing and evaluation of coating - RESULTS AND DISCUSSION : Pigments characterization - FTIR - Coatings morphology - Corrosion results - Color and gloss measurements - Mechanical properties of the coatings - Pull-off strength results - Table 1 : The paint formulations - Table 2 : XRF analysis of mica, Ce-Fe@M, and Zr-Fe@M - Table 3 : Corrosion resistance of the coatings containing mica, Ce-Fe@M, and Zr-Fe@M - Table 4 : Electrochemical measurements results obtained from potentiodynamicanodic polarization and OCV technique - Table 5 : EIS data of the coatings containing mica, Ce-Fe@M, and Zr-Fe@MTable 6 Color and gloss results of coatings containing mica, Ce-Fe@M, and Zr-Fe@M
DOI :	https://doi.org/10.1007/s11998-022-00693-z
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00693-z.pdf?pdf=button
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Facile synthesis of atomic oxygen-resistant methyl silicone rubber-coated Kapton film for photovoltaic solar array blanket in low Earth orbit [texte imprimé] / Yi Li, Auteur ; Zhonghua Li, Auteur ; Yanchun He, Auteur ; Kai Wang, Auteur ; Detian Li, Auteur . - 2023 . - p. 623-633.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 623-633

Catégories :	CaractérisationCorrosion par érosionElastomères silicones vulcanisables à chaudKaptonLe Kapton est un film de polyimide (polymère à base d'imide) développé à la fin des années 1960 par DuPont, qui peut rester stable dans une plage étendue de température, de −269 à 400 °C. Utilisation : La conductivité thermique du Kapton à des températures de 0,5 à 5 kelvins est plutôt élevée pour de telles températures basses. Ceci, combiné à ses bonnes qualités diélectriques et à sa disponibilité en tant que feuilles minces, en fait un matériau de prédilection pour la cryogénie, car il fournit une isolation électrique à faibles gradients thermiques. Le Kapton est régulièrement utilisé comme isolant dans des environnements à très haut vide en raison de son faible taux de dégazage. Il est utilisé, entre autres, dans le processus de fabrication des circuits imprimés souples, les supports de bobines mobiles de haut-parleurs haute puissance et pour l'isolation de certains fils électriques de « haute fiabilité » pour les domaines aéronautiques et spatiaux (lanceurs et satellites). Il est aussi utilisé dans le domaine de l'impression 3D grâce à son adhérence avec le plastique à des températures dépassant 40 °C et grâce à sa résistance à la chaleur. De plus, il peut être utilisé pour l'isolation des méplats cuivre ou aluminium. Cette isolation est utilisée pour la construction des moteurs de traction (de train) soumis à des températures élevées. Ce nom de marque est passé dans le langage courant, comme le kevlar[réf. souhaitée]. Un rouleau de Kapton adhésivé Un rouleau de Kapton adhésivé. Le Kapton est également utilisé dans la fabrication des circuits imprimés souples (dits « flex »), ainsi qu'en réparation électronique en tant qu'isolant. Il est disponible en ruban. Le Kapton peut aussi servir en impression 3D pour renforcer le pouvoir adhésif des plateaux chauffants souvent peu adhérents lors de l'impression des pièces plastiques. Bouclier thermique du télescope James-Webb, fait à partir de Kapton. Le bouclier thermique du télescope James-Webb est composé de cinq feuilles de Kapton (couvertes d'aluminium). (Wikipedia)MesureOxygène atomiquePolyimidesRevêtements organiquesRevêtements protecteurs
Index. décimale :	667.9 Revêtements et enduits
Résumé :	A highly flexible coating deposited on organic substrates is one of the most suitable techniques for efficient atomic oxygen (AO) resistance in low Earth orbit (LEO). In this study, a highly homogeneous methyl silicone rubber coating as an AO-tolerant material was fabricated on a flexible Kapton film by a spraying process used in a photovoltaic solar array blanket. The produced silicone rubber coating has excellent AO resistance and exhibits a low shrinkage tendency after evaluating the effect of atomic oxygen on the erosion kinetics, surface morphology, and surface composition of this coating. The erosion yield of the silicone rubber-coated Kapton, which was less than 3.1% of that of the Kapton, was less than 0.92 × 10−25 cm3 atom−1 under an AO fluence of 4.04 × 1021 atoms cm−2 (equiv 10 years of AO exposure in the LEO with an altitude of 500 km). It suggests that the silicone rubber layer can effectively prevent AO from eroding Kapton. In addition, a SiO2 passivation layer was formed on the surface of the silicone rubber coating during AO irradiation, which demonstrated a “self-reinforcing” protection mechanism. This work also provides a facile method for designing and preparing large-scale flexible protective coatings with excellent AO resistance.
Note de contenu :	- EXPERIMENTAL : Materials - Fabrication of silicone rubber protective coating - Atomic oxygen exposure experiments - Thermal cycling test Measurements and characterization - RESULTS AND DISCUSSION : Characterization of methyl silicone rubber coating - Evaluation of AO resistance of silicone rubber protective coatings - The effect of AO on the surface morphology and optical properties of Kapton and silicone rubber-coated Kapton films - Influence of AO on the chemical structure of the silicone rubber coating - Influence of AO on the surface chemical compositions of the silicone rubber coatings - Table 1 : AO erosion data, optical transparency, and root mean square roughness (RMS) values for pristine Kapton and silicone rubber-coated Kapton before and after exposure to a variety of AO fluences - Table 2 Surface compositions of the silicone rubber coating before and after AO exposure obtained from XPS data, and corresponding to the central peak position and FWHM
DOI :	https://doi.org/10.1007/s11998-022-00694-y
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00694-y.pdf?pdf=button% [...]
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Field testing and ecotoxicity of acrylate-based sol–gel coatings in fresh and seawater [texte imprimé] / Damir Hamulic, Auteur ; Ieva Putna-Nimane, Auteur ; Ineta Liepina-Leimane, Auteur ; Inta Dimante-Deimantovica, Auteur ; Peter Rodic, Auteur ; Ingrid Milosev, Auteur . - 2023 . - p. 687-701.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 687-701

Catégories :	AcierL'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique. L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1. C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe dÂ’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.Algues marinesAngle de contactBiodégradationCorrosionDaphnieEcotoxicologieEssais (technologie)Essais de brouillard salinEssais de résilienceImmersionLixiviationMétaux -- Revêtements protecteursMouillabilitéPolyméthacrylatesSiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).SiloxanesLes siloxanes sont une classe de composés du silicium dont la formule empirique est R2SiO, où R est un groupe radical qui peut être organique. Des exemples représentatifs sont [SiO(CH3)2]n (diméthylsiloxane) et [SiO(C6H5)2]n (diphénylsiloxane), où n est typiquement supérieur à 4. Ces composés peuvent être des hybrides organiques et inorganiques. Les chaînes organiques confèrent au composé des propriétés hydrophobes alors que la chaîne principale -Si-O-Si-O- est purement inorganique. Le mot siloxane est dérivé de Silicium, Oxygène et alkane. Des siloxanes peuvent être trouvés dans des produits tels que des cosmétiques, des déodorants, des enduits hydrophobes pour pare-brise, des peintures et certains savons. Les siloxanes polymérisés (polysiloxanes) sont appelés silicones1,2. Le siloxane est massivement utilisé dans l'industrie cosmétique (rouges à lèvre, conditionneurs et shampooings, déodorants, etc.). Une application récente du Siloxane D5 (2001) a été trouvée dans le nettoyage à sec des textiles en remplacement du perchloroéthylène. Ce procédé est très répandu aux États-Unis et au Royaume-Uni. Il devient de plus en plus courant en Europe continentale dont la France, afin de promouvoir l'usage de procédés écologiques et respectueux de la santé humaine.Sol-gel, Procédé
Index. décimale :	667.9 Revêtements et enduits
Résumé :	We demonstrate a laboratory and field-testing of six siloxane-based coatings to be potentially used as a topcoat paint on structured steel. The coatings were prepared with acrylate monomers of six chain lengths, from methyl to dodecyl. Coated steel samples were immersed in seawater (the Adriatic Sea, 38‰ salinity) and freshwater (the river Ižica) for up to five months to test their properties. The coated samples were tested for possible leaching when exposed to accelerated harsh environmental conditions. The leachate toxicity was examined against microalgae Desmodesmus subspicatus and microcrustacean Daphnia magna. The ethyl and butyl methacrylate coatings provided the best protective properties compared to those with longer chain lengths. The synthesized coatings show less toxicity than commercial biocide-containing coatings. The developed coatings represent a good starting point for an additional upgrade in the system for offshore or similar applications.
Note de contenu :	- METHODS AND MATERIALS : Preparation of substrate and coatings - Wettability of the coatings - Laboratory corrosion test - Field immersion test - Accelerated leaching test - Ecotoxicological test with Daphnia magna Straus, 1820 - Algae growth test - RESULTS AND DISCUSSION : Wettability of the coating surface - Laboratory salt spray chamber test - Field immersion test - Immersion in Ižica river - Ecotoxicological test - Daphnia magna test - Table 1 : Water contact angle values for hybrid coatings with different lengths of the alkyl chain - Table 2 : The average amount of fouling coverage percentage after immersion of hybrid sol–gel coatings in the Adriatic Sea
DOI :	https://doi.org/10.1007/s11998-022-00701-2
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00701-2.pdf?pdf=button
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Formulation and testing of a slow-release antimicrobial paint: a case study of antifungi and antialgae activity for interior and exterior applications [texte imprimé] / Amir S. Kazemi, Auteur ; Roozbeh Mafi, Auteur ; Drew C. Higgins, Auteur . - 2023 . - p. 573-585.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 573-585

Catégories :	Anti-alguesAntifongiquesAntimicrobiensEssais accélérés (technologie)Formulation (Génie chimique)LixiviationPolyacryliquesRevêtements organiquesSpectroscopie ultravioletteSystème de libération contrôlée (technologie)
Index. décimale :	667.9 Revêtements et enduits
Résumé :	The colonization of microorganisms on painted surfaces varies according to paint formulation, support substrate, and environmental conditions. Developing antimicrobial coatings to prevent growth of microorganisms can prevent adverse health and environmental consequences. Release of antimicrobial agents from the coating surface over time presents toxicity and diminishing antimicrobial protection challenges. Herein, we have formulated and performed 272 tests (including the control experiments, and not including the replication assays) on water-based paint formulations against different species, including Aureobasidium pullulans and Chlorella vulgaris, among others, before and after accelerated weathering tests. Based on the zone of inhibition values (Z value) from fungi and algae resistance tests, 97% of the formulations were effective against fungi species prior to accelerated weathering, while approximately one-third were effective against algae species. Formulations with lower Z values (X2-678, X3-P20T, R1-663, and X2-663) indicated slow release of the biocide via diffusion-controlled behavior is effective in performance optimization and minimizing environmental impacts. For antialgae applications, R1-663 and X2-663 with average Z value variations of 3.3 and 2.0 mm, respectively, ensure full protection. Weathering testing demonstrated 3 of 10 samples failed by cracking and delamination. The main objective of this work is to evaluate, compare, and enhance antimicrobial paint formulations considering the advantages of slow-release and controlled-release approaches. Among samples that passed weathering tests, X1-663, X1-P20T, X3-663, and X3-P20T had the most consistent antifungi activity, while X1-663 and X3-663 showed the best antialgae activity. The difference in antifungi and antialgae activity was mainly attributed to differences in release mechanism based on biocides’ solubility in water, size, and diffusion through the coating layer.
Note de contenu :	- MATERIALS AND METHODS : Formulation - Resistance tests against fungi and algae - Weathering test - Biocide leaching quantification by UV-Vis spectroscopy - RESULTS AND DISCUSSION : Fungi and algae resistance tests - Accelerated weathering test - Biocide release detection - Table 1: Acrylic antimicrobial paint formulation - Table 2 : List of the biocides used in this work - Table 3 : Type and concentration of resin and crosslinker present in each formulation - Table 4 : Accelerated weathering results
DOI :	https://doi.org/10.1007/s11998-022-00691-1
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00691-1.pdf?pdf=button% [...]
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Graphene-based polymer coatings for preventing marine corrosion : a review [texte imprimé] / Amit Sharma, Auteur ; Sumit Sharma, Auteur . - 2023 . - p. 413-432.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 413-432

Catégories :	AnticorrosionEnrobage (technologie)Graphène -- SynthèseGraphèneLe graphène est un cristal bidimensionnel (monoplan) de carbone dont l'empilement constitue le graphite. Il a été isolé en 2004 par Andre Geim, du département de physique de l'université de Manchester, qui a reçu pour cette découverte le prix Nobel de physique en 2010 avec Konstantin Novoselov. Il peut être produit de deux manières : par extraction mécanique du graphite (graphène exfolié) dont la technique a été mise au point en 2004, ou par chauffage d'un cristal de carbure de silicium, qui permet la libération des atomes de silicium (graphène epitaxié). Record en conduction thermique jusqu'à 5300 W.m-1.K-1. C'est aussi un matériaux conducteur.Métaux -- Revêtements protecteursProtection cathodiqueRevêtements antisalissures:Peinture antisalissuresRevêtements organiques
Index. décimale :	667.9 Revêtements et enduits
Résumé :	In recent years, many breakthroughs in research on graphene as a corrosion-resistant coating for metal have been witnessed due to its excellent properties like chemical stability, mechanical strength, permeability, etc. The present review discusses graphene and its composite as an anticorrosive coating for marine applications. The economic and environmental losses caused by the corrosion in day-to-day life are large, and coatings are one of the preventive measures to reduce these losses. The corrosion gets accelerated when some significant factors like salinity, pH, water velocity, temperature, and dissolved oxygen content also come into picture. The excellent physical and chemical properties for graphene like high strength electrical conductivity, large surface area, etc., make it a potential candidate for a number of applications. The different techniques for the synthesis of graphene and its derivatives like graphene oxide and reduced graphene oxide have been also briefed in this review. The pure graphene coatings have shown excellent anticorrosive properties. However, defects in pure graphene coating have a substantial impact compared to multilayering for anticorrosive behavior. Graphene-based composites are more durable and reliable than pure graphene coating. The various techniques for the synthesis of graphene-based polymer coatings are solution mixing, melt mixing, and in situ polymerization. In the marine environment, graphene should be dispersed uniformly parallel to the metallic surface to provide excellent erosion corrosion properties. However, cathodic protection is a crucial issue in organic coatings, and zinc-rich graphene coatings are effective in case of defects in the coating. Other functional properties of graphene-based polymeric coatings like antifouling, hydrophobicity, better mechanical and wear properties, UV protection, and electrical conductivity give an edge to these coatings in marine conditions.
Note de contenu :	- MARINE CORROSION : Mechanism of corrosion - Factors triggering marine corrosion - GRAPHENE AND ITS DERIVATIVES : Synthesis routes of graphene and its derivatives - GRAPHENE AS AN ANTICORROSIVE COATING - GRAPHENE COATING : CHALLENGES AND OPTIMIZATION MEASURES - GRAPHENE COMPOSITE COATING : Synthesis route of graphene-based polymer coatings - Optimization measure for graphene-based composite coating - Graphene conductance and cathodic protection - Graphene composite coating as a functional coating - FUTURE SCOPE - Table 1: Various synthesis routes of GO - Table 2 : Graphene-based composite coatings
DOI :	https://doi.org/10.1007/s11998-022-00730-x
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00730-x.pdf?pdf=button% [...]
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Green bonding processes [texte imprimé] / Andreas Weymann, Auteur . - 2023 . - p. 22-25.Langues : Multilingue (mul)in ADHESION - ADHESIVES + SEALANTS > Vol. 20, N° 1/2023 (2023) . - p. 22-25

Catégories :	Adhésifs -- Applications industriellesCollage -- Aspect de l'environnementDurée de vie (Ingénierie)EvaluationRessources renouvelables
Index. décimale :	668.3 Adhésifs et produits semblables
Résumé :	Global demand for sustainable bonding solutions is growing and is increasingly used for the production of furniture, construction elements or textiles. But how can industrial bonding applications be made more sustainable across the different sectors ?
Note de contenu :	- renewable raw materials - Consumer protection - Occupational health and safety - Conserving resources - Fig. 1 : Aspects for evaluating a sustainable future-proof adhesive
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High-adhesion silicone gels for wound care with less pain [texte imprimé] / Thomas Gröer, Auteur ; Andrea Bogner, Auteur . - 2022 . - p. 28-33.Bibliogr.Langues : Multilingue (mul)in ADHESION - ADHESIVES + SEALANTS > Vol. 19, N° 4/2022 (2022) . - p. 28-33

Catégories :	Adhésifs à usages médicauxGel de siliconePansementsPolymères en médecine
Index. décimale :	668.3 Adhésifs et produits semblables
Résumé :	Atraumatic wound dressings generally contain gentle silicone gel adhesives. A current study shows that high-adhesion silicones can also offer wound care with less pain. At the same time, such products are also suitable for medical applications other than wound care.
Note de contenu :	- Long-term test of wear properties - Properties and advantages of silicones adhesives - Test conditions - Pain perception during detachment - ear times of the wound dressings - Residues after detachment - Supplementary laboratory tests
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Hydrophobically modified hydroxyethyl cellulose (hmHEC) - effective low-shear viscosity builder for latex paints [texte imprimé] / Artur Palasz, Auteur . - 2022 . - p. 40-42.Bibliogr.Langues : Anglais (eng)in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4676 (08/2022) . - p. 40-42

Catégories :	Concentration pigmentaire volumiqueEpaississantsFormulation (Génie chimique)HydrophobiehydroxyéthylcelluloseRevêtements -- Additifs:Peinture -- AdditifsStabilité au stockageViscosité
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Cellulose thickeners are the basic group of rheological modifiers ensuring the viscosity of dispersion paints in the low-shear (Brookfield) and mid-shear forces (Stormer) area. They provide resting viscosity and allow the paint structure to be rebuilt after application to the substrate at higher shear rates (e.g. roller), preventing sagging. Standard grades of hydroxyethyl cellulose as paint thickeners are common and used in both high and low PVC (pigment volume concentration) latex paint formulations. In low-cost contractor's dispersion paints with very high PVC (e.g. ceiling paints), HEC also acts as a binder supporting the binding of pigments and fillers. Unfortunately, typical HEC thickeners do not allow for non-spattering properties when painting with a roller, and such a feature is extremely desirable for the paint market, especially where interior painting is performed by non-professional painters. The solution to this problem cornes with hydrophobically-modified HEC thickeners, the effectiveness of which will be discussed in this article.
Note de contenu :	- From cellulose to cellulose derivative thickeners - Experimental - Test results and discussion : Viscosity - Sagging - Spattering - Storage stability - Table 1 : Formulation used in case studies of HEC/hmHEC thickeners - Table 2 : Test result and anti-sag index - Fig. 1 : Examples of reaction mechanisms for the formation of cellulose derivatives as thickeners - Fig. 2 : Examples of cellulose ether substitutions - Fig. 3 : Structure of hydrophobically-modified HEC
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HYPOMER MT 2550K - Hydroxy acrylic matting resins [texte imprimé] / Ana Sanchez, Auteur . - 2023 . - p. 46-48.Langues : Anglais (eng)in SURFACE COATINGS INTERNATIONAL > Vol. 106.1 (01-02/2023) . - p. 46-48

Catégories :	AdhésionAgent mattantMatières plastiques -- RevêtementPolyhydroxyacryliqueProduits commerciauxRevêtements (produits chimiques)ToucherTransparence (optique)
Index. décimale :	667.9 Revêtements et enduits
Résumé :	HYPOMER® MT 2550K is a proprietary hydroxy acrylic-based, liquid matting resin that provides excellent matting effect without the addition of any additional matting agent upon drying. It comes in a low odour, aromatic-free composition. Dry films of the resins are characterised by excellent transparency, smoothness and tactile or touch feel effect. It is produced using a special polymerisation reaction and a process that combines non-soluble acrylic particles with a liquid resin through a bridging mechanism.Through a good balance of hydrophilicity and hydrophobicity, the solid particles are uniformly dispersed and suspended in the liquid resin to form an opaque white liquid. It has good adhesion on ABS, ABS/PC and other plastic substrates. It also has good compatibility with conventional hydroxy acrylic resins. Consequently, these resins combinations and other OH-functional crosslinking resins (e.g. acrylic, PU) produce, depending on the ratio, a wide range of semi-matt to matt clear, solid colour and metallic finishes with excellent performance.
Note de contenu :	- Matting theory - Experimental - Table : Physical properties
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Improved adhesion : Silanes alternatives for a better grip [texte imprimé] / Marko Soltau, Auteur ; Benjamin Traxel, Auteur . - 2023 . - p. 18-21.Bibliogr.Langues : Anglais (eng)in EUROPEAN COATINGS JOURNAL (ECJ) > N° 5 (05/2023) . - p. 18-21

Catégories :	AdhésionApplication directe sur le métalInhibiteurs (chimie)Métaux -- Revêtements protecteursRevêtements -- Stockage:Peinture -- StockageRevêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- AdditifsSilanes organofonctionnels
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Silane-based inhibitors are currently popular due to the emergence of water-borne metal coatings and one-component single-layer systems (direct-tometal, DTM). Their supporting effect in adhesion seems predestined to perfectly complement corrosion protection for paint systems – for example, to prevent delamination and corrosion around a scribe or to improve water resistance. The advantages and disadvantages of this chemistry are examined here, together with less expensive alternatives on the market.
Note de contenu :	- Temperature storage with silane in water-based paints - Organofunctional silanes - Disadvantages of such systems - Alternatives - no loss of efficiency
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Improving indoor air quality with amino alcohols [texte imprimé] / Mark Langille, Auteur ; Romain Severac, Auteur . - 2023 . - p. 52-55.Bibliogr.Langues : Anglais (eng)in SURFACE COATINGS INTERNATIONAL > Vol. 106.1 (01-02/2023) . - p. 52-55

Catégories :	Air -- EpurationAir intérieurAmino-alcoolsDépolluantsFormaldéhyde -- EliminationFormulation (Génie chimique)Matériaux -- Propriétés fonctionnellesRevêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- AdditifsRevêtements intérieurs:Peinture intérieure
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Amino alcohols based on ANGUS chemistry can assist formulators in creating more environmentally-friendly paints and coatings. Multifunctional additives from ANGUS can be used to create low- and zero-VOC waterborne formulations, as well as low emissive coatings that qualify for green label certification programs. Amino alcohols are also highly effective formaldehyde scavengers that can be used to create functional coatings that improve indoor air quality.The level of hazardous air pollutants can be five times higher in indoor air than outdoor air and chronic exposure to these invisible indoor toxins, such as formaldehyde, can create long-term health problems. An attractive solution to reducing indoor formaldehyde levels is through a chemical remediation or scavenging system, and one of the emerging trends for the effective removal of indoor air contaminants is the use of functional coatings. We demonstrate how the unique functionality of amino alcohols can help improve indoor air quality by providing high-efficiency formaldehyde scavenging performance when used in waterborne architectural paints. Amino alcohol additives are highly effective at low dosages and do not require major reformulation work, enabling the creation of functional coatings to improve indoor air quality.
Note de contenu :	- ANGUS products for improving indoor air quality - Methodology - Formaldehyde Scavenging Test by ISO 16000-23 - Results - Table 1 : Base waterborne formulation - Table 2 : Performance of coatings formulations according to Chinese JC/T 1074-2008 standard - Fig. 1 : The evolution of more environmentally-friendly paints and the emergence of VOC remediation technologies - Fig. 2 : Analysis of airborne VOC concentrations in residences, daycare centres and schools in France - Fig. 3 : Reaction of AEPD VOX 1000 with two equivalents of formaldehyde to yield a bisoxazolidine - Fig. 4 : Reaction of TRIS AMINO with two equivalents yield a bisoxazolidine - Fig. 5 : Schematic of a small-scale testing chamber to monitor formaldehyde scavenging performance of a coating - Fig. 6 : Evaluation of scavenging performance according to 150 16000-23 test method
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Industry 4.0 for parts quality and effective flow of goods [texte imprimé] . - 2022 . - p. 16-19.Langues : Anglais (eng)in INTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 15, N° 2 (2022) . - p. 16-19

Catégories :	Ateliers de peinture industrielleAutomatisationConvoyeursIndustrie 4.0Le concept dÂ’Industrie 4.0 correspond à une nouvelle façon dÂ’organiser les moyens de production : lÂ’objectif est la mise en place dÂ’usines dites "intelligentes" ("smart factories") capables dÂ’une plus grande adaptabilité dans la production et dÂ’une allocation plus efficace des ressources, ouvrant ainsi la voie à une nouvelle révolution industrielle. Ses bases technologiques sont l'Internet des objets et les systèmes cyber-physiques.Internet des objetsL'Internet des objets représente l'extension d'Internet à des choses et à des lieux du monde physique. Alors qu'Internet ne se prolonge habituellement pas au-delà du monde électronique, l'internet des objets (IdO, ou IoT pour Internet of Things en anglais) représente les échanges d'informations et de données provenant de dispositifs présents dans le monde réel vers le réseau Internet. L'internet des objets est considéré comme la troisième évolution de l'Internet, baptisée Web 3.0 (parfois perçu comme la généralisation du Web des Objets mais aussi comme celle du Web sémantique) qui fait suite à l'ère du Web Social. L'internet des objets est en partie responsable de l'accroissement du volume de données générées sur le réseau, à l'origine du Big Data. L'internet des objets revêt un caractère universel pour désigner des objets connectés aux usages variés, dans le domaine de la e-santé, de la domotique ou du Quantified Self.Revêtements poudre
Index. décimale :	667.9 Revêtements et enduits
Résumé :	A surface technology specialist has invested in a fully automated powder coating plant with control intelligence. The plant with connection to the existing ERP system enables the user to optimally utilize production capacities and efficient production processes for powder coating, steel, stainless steel and aluminium in a mix.
Note de contenu :	- Quality and flexibility in the foregroung - Multi-metal chemicals - Double coating concept - Two-lane powder furnace - Power-and-free conveyor technology - State-of-the-art control technology - To the point - Fig. 1 : 3D model of powder-coating-system - Fig. 2 : 3D view of a pre-treatment-booth - Fig. 3 : The powder booth is equipped with vertically arranged and movable application guns on both sides
DOI :	https://doi.org/10.1007/s35724-022-0558-7
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Influence of modified graphene oxide on the antifouling performance of waterborne polyurethane coatings containing amphiphilic honeycomb surface [texte imprimé] / Xu Zhao, Auteur ; Yuhong Qi, Auteur ; Zhanping Zhang, Auteur . - 2023 . - p. 725-740.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 725-740

Catégories :	CaractérisationFormulation (Génie chimique)Oxyde de graphènePolymères amphiphilesPolymères en émulsionPolyuréthanesRevêtements antisalissuresStructure en nid d'abeillesSurfaces (technologie)
Index. décimale :	667.9 Revêtements et enduits
Résumé :	The coating with amphiphilic honeycomb surface containing modified graphene oxide was constructed by a three-step method for improved antifouling properties. Graphene oxide is modified with potassium hydroxide and γ-aminopropyltriethoxysilane, and then the product is dispersed in water and ethanol. Isophorone diisocyanate, polyethylene glycol, and γ-aminopropyltriethoxysilane are used to construct an amphiphilic prepolymer. The honeycomb surface is constructed during the evaporation of water and ethanol and the mixing of the modified graphene oxide and prepolymer. The amphiphilic honeycomb surface gives the coating fouling resistance and fouling release, while the modified graphene oxide gives the coating fouling degradation. The coatingÂ’s amphiphilicity, microstructure, and antifouling properties are characterized by the contact angle, confocal laser scanning microscope, scanning electron microscopy, benthic diatom, and bacterial adhesion. The results show that the coatings form an amphiphilic surface with a honeycomb microstructure and exhibit good antifouling properties. The water, diiodomethane, and 1-bromonaphthalene contact angle can be less than 20°. The size and depth of the honeycomb microstructure are about 600 nm and 100–200 nm. Compared with traditional polyurethane and waterborne silicone coatings, the resistance to benthic diatom and bacteria is increased by at least 28 and 400 times, respectively.
Note de contenu :	- EXPERIMENTAL SECTION : Materials - Synthesis of amphiphilic honeycomb coatings containing KGO (KGWPU) - Characterization - RESULTS AND DISCUSSION : Structural properties - Mechanical properties - Amphiphilic properties - Morphological properties - Antifouling properties - Mechanism of antifouling - Table 1 : The basic formulation of KGWPU with varying KGO contents
DOI :	https://doi.org/10.1007/s11998-022-00704-z
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00704-z.pdf?pdf=button% [...]
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Influence of the association of hydrophobic end groups on the temperature insensitivity of HEUR-thickened latex/Fe2O3/Zn3(PO4)2/BaSO4 suspensions [texte imprimé] / Yating Lin, Auteur ; Chunmei Song, Auteur ; Xiong Xiao, Auteur ; Wan Bo, Auteur . - 2023 . - p. 587-601.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 587-601

Catégories :	Dispersions et suspensionsFormulation (Génie chimique)LatexPolymères -- Propriétés thermiquesPolymères -- SynthèsePolyuréthane éthoxylé modifié de façon hydrophobeRésistance thermiqueRevêtements organiquesRhéologieStabilité au stockageThixotropie
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Hydrophobically modified ethoxylated urethane (HEUR) with different structures was synthesized and confirmed by gel permeation chromatography, Fourier transform infrared spectroscopy and nuclear magnetic resonance (1H NMR). We propose the relationship between the temperature insensitivity model and the thickening mechanism of HEUR/latex/Fe2O3/Zn3(PO4)2/BaSO4 suspensions. Meanwhile, the temperature insensitivity of HEUR/C suspensions is the result of two main associations: intermolecular interactions bridging the hydrophobic tails of HEURs and the hydrophobic groups tightly adsorbing onto the latex particle surfaces. A smaller ratio of viscosity (Rv) at 1 s−1 from the steady state condition indicates the better temperature insensitivity of viscosity. The higher degree of crystallinity and rheological activation energy corresponds to a great extent with better temperature insensitivity due to stronger association. The temperature insensitivity is consistent with the longer hydrophobic chain, which was proven by hysteresis tests and oscillatory shear measurements. The storage stability was enhanced in the lockstep with a hydrophobic length of HEUR, which is consistent with the rougher surfaces of HEUR/C films. As an appealing method, the results are meaningful and instructive for coating storage and application.
Note de contenu :	- EXPERIMENTAL : Materials - Measurements - Synthesis of HEURs - Preparation of HEUR/C suspensions - RESULTS AND DISCUSSION : Characterization of HEURs - Melting temperature and crystallinity of HEURs - Rheological behavior of HEUR/C suspensions - Storage stability and aggregation structure of HEUR/C suspensions - Table 1 : Description of the coating formulation - Table 2 : Molecular characteristics of polymers - Table 3 : Thermoproperties and crystallization of HEUR - Table 4 : Rheological properties of HEUR/C suspensions with different hydrophobicities - Table 5 : Storage stability of HEUR/C suspensions - Table 6 : Non-Newtonian exponents of HEUR/C suspensions - Table 7 : Roughness parameters of the sample films
DOI :	https://doi.org/10.1007/s11998-022-00692-0
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00692-0.pdf?pdf=button% [...]
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Interaction of interfacial debonding and under-film corrosion propagation at the edge of the blistering area of epoxy coating [texte imprimé] / Chao Li, Auteur ; Jin Gao, Auteur ; Yunhua Huang, Auteur ; Xin Zhang, Auteur ; Xiaogang Li, Auteur . - 2023 . - p. 457-468.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 457-468

Catégories :	AcierL'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique. L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1. C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe dÂ’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.Chimie des surfacesCloquage (défauts)CorrosionEpoxydesRevêtements organiquesSpectroscopie d'impédance électrochimique
Index. décimale :	667.9 Revêtements et enduits
Résumé :	The blistering of epoxy coating and its evolution were investigated after being exposed to 3.5 wt% NaCl solution. The evolution of under-film corrosion could be divided into four stages according to the observation of the corrosion morphology and the distribution of corrosion products and elements. Corrosion propagation was related to the distribution of media at the edge of the blistering area. Local electrochemical impedance spectroscopy analysis revealed that local impedance mapping could help in predicting the direction of corrosion propagation. The interfacial debonding at the edge of the blistering area was a necessary condition for corrosion propagation.
Note de contenu :	- EXPERIMENT : Specimens - Instrumentation - RESULTS : Analysis of microenvironment under blistering - Local electrochemical impedance of the blistering area
DOI :	https://doi.org/10.1007/s11998-022-00680-4
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00680-4.pdf?pdf=button% [...]
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Intumescent coatings for fire resistance of steel structures : current approaches for qualification and design [texte imprimé] / Donatella de Silva, Auteur ; Iolanda Nuzzo, Auteur ; Emidio Nigro, Auteur ; Antonio Occhiuzzi, Auteur . - 2022 . - p. 31-37.Bibliogr.Langues : Anglais (eng)in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4676 (08/2022) . - p. 31-37

Catégories :	AcierL'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique. L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1. C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe dÂ’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.CertificationIgnifugeantsComposé chimique utilisé pour réduire l'inflammabilité. Il peut être incorporé au produit durant sa fabrication ou appliqué ultérieurement à sa surface.Intumescence (chimie)Métaux -- Revêtements protecteurs
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Intumescent coatings (lCs) are often used for protecting steel buildings during a fire when the structural, aesthetic, and architectural features of the structural members should be preserved. ICs form a thin protective layer on the steel surface, that if exposed to fire or elevated temperatures, expands in volume with a consequent reduction in density. Hence, the protective layer captures heat and protects the structural member from damage or elevated deformation. This reactive fire protection is designed using prescriptive tables, in which the IC thickness is chosen according to the required fire resistance, critical temperature, and section factor of the steel element. These tables are elaborated on the basis of the tests results according to the UNI EN 13381-8 standard, which is the reference for characterising reactive systems such as ICs. For its reactive nature, this fire protection has to be applied to the structure in a controlled manner, and it is good practice to verify its correct application by measuring thickness and adhesion in situ through regulated methods. The qualification process of IC systems in Italy can be realised through a voluntary certification within the scope of a European technical assessment or by means of a national technical assessment certificate that is mandatory. Ail these aspects related to qualification, assessment, and design of ICs are often ignored by both designers and manufacturers, especially in Italy. Therefore, this paper describes all the approaches, introducing the main technical differences, in order to provide a sort of guideline on the use of these reactive fire protections
Note de contenu :	- IC TECHNICAL SOLUTION : Inert phase - Transient phase - Steady phase - post-austenitisation phase - QUALIFICATION PROCESS : National qualification process - European qualification process - DESIGN AND CONTROL OF THE APPLICATION : OVERVIEW OF AVAILABLE CODES : Design and verification methods with a prescriptive-based approach - Design and verification methods with a performance-based approach - Control of IC application - Table 1 : Typical table for the prescriptive design of IC thickness - Table 2 : Essential characteristics and relative assessment methods for reactive coating systems according to EAD 350402-00-1106
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Inventive routes for the preparation of waterborne acrylic polyols for 2K PU protective topcoats [texte imprimé] / David Vanaken, Auteur ; Denis Heymans, Auteur ; Félix Feng, Auteur ; Nathalie Havaux, Auteur . - 2022 . - p. 19-22.Bibliogr.Langues : Anglais (eng)in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 212, N° 4676 (08/2022) . - p. 19-22

Catégories :	Dispersions et suspensionsNéodécanoate de glycidylePolyacryliquesPolyolsPolyuréthanesRevêtements -- FinitionRevêtements bi-composantRevêtements en phase aqueuseRevêtements organiquesRevêtements protecteurs
Index. décimale :	667.9 Revêtements et enduits
Résumé :	The authors summarises all of the recent data published on producing waterborne acrylic polyols for 2K PU topcoats. New regulations, increased awareness and the importance of environmental stewardship lead to a strongly increased demand for waterborne (WB) protective topcoats. However, matching the performance of solventborne (SB) two-component (2K) polyurethanes remains a challenge for resin and paint producers. Synthesis and formulation of primary or secondary dispersions are not straightforward. For secondary dispersions, the removal of solvents from polyols prior to dispersion in water is technically challenging. The emulsion polymerisation process producing primary dispersions often poses problems of water-phase homopolymerisation of the hydroxyl monomers resulting in poor stability of the emulsions, high process grit and insufficient crosslinking of the final coatings. Waterborne acrylic polyols (APO) for 2K urethane finishes have played an important role in enabling regulatory compliance in the industrial market, yet their synthesis can be difficult. This paper introduces two methods to produce high-performance solvent-free waterborne acrylic polyols using either glycidyl neodecanoate or its acrylated adduct. The performance characteristics of coatings made with these waterborne polyols are also demonstrated.
Note de contenu :	- Waterborne technologies - Waterborne APO secondary dispersions - Performance of waterborne acrylic polyols based on glycidyl neodecanoate - Waterborne APO secondary dispersions conclusion - Waterborne hydroxy-functional emulsions - Primary vs. secondary dispersions - Novel OH-functional emulsions for high-performance WB 2K PU coatings - Waterborne hydroxy-functional emulsion conclusions
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Investigation of UV-curable alkyd coating properties [texte imprimé] / Qianhe Wang, Auteur ; Jomin Thomas, Auteur ; Mark D. Soucek, Auteur . - 2023 . - p. 545-557.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 545-557

Catégories :	DiluantsFormulation (Génie chimique)Huile de linL'huile de lin ou "huile de graines de lin" est une huile de couleur jaune d'or, tirée des graines mûres du lin cultivé, pressées à froid et/ou à chaud ; parfois elle est extraite par un solvant, en vue de l'usage industriel ou artistique, principalement comme siccatif, ou huile auto-siccative. Les utilisations de l'huile de lin dérivent de sa richesse en acides gras polyinsaturés, en particulier en acides linolénique et linoléique, qui lui doivent leur nom. L'huile de lin polymérise spontanément à l'air, avec une réaction exothermique : un chiffon imbibé d'huile peut ainsi, dans certaines conditions, s'enflammer spontanément. Pour ses propriétés de polymère, l'huile de lin est employée seule, ou mélangée à d'autres huiles, résines et solvants, et est utilisée en tant que : Imprégnateur et protecteur des bois à l'intérieur comme à l'extérieur : protection contre l'humidité, les champignons et insectes, et contre la poussière par son caractère antistatique, composant de certains vernis de finition, liant de broyage pour la peinture à l'huile, agent plastifiant du mastic de vitrier, agent durcisseur de diverses préparations, agent de cohérence et liant dans la fabrication du linoléum.MéthacrylatesPhotoréticulationPolyalkydesPolymères -- SynthèseRéticulantsRevêtements -- Propriétés mécaniquesRevêtements -- Séchage sous rayonnement ultravioletRevêtements organiquesTriacrylate de glycérolTriméthacrylate de glycérol
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Four types of UV-(meth)acrylate curable alkyds were synthesized and formulated with two tri(meth)acrylate reactive diluents. Thermal, mechanical, and coating properties, including gloss, adhesion, hardness, impact resistance, and chemical resistance, were evaluated. In general, methacrylate-based UV-curable alkyd has higher modulus and toughness, whereas acrylate-based UV-curable alkyd has better flexibility and adhesion. In all four UV-curable alkyd resin systems, increasing reactive diluent content will enhance properties like tensile strength and modulus, hardness, and chemical resistance. However, there is a decrease in properties such as elongation at break, adhesion, and impact resistance. Among four UV-curable alkyd resin, acrylated medium linseed oil alkyd exhibited the best overall performance than other systems in terms of hardness, flexibility, and adhesion. Particularly, acrylated medium linseed oil alkyd formulations with 20–30 wt% of glycerol triacrylate as reactive diluent showed the best coating performance. It is possible to produce coating films with a good balance of crosslink density, flexibility, and adhesion using such UV-curable alkyd systems. Further, it has a huge potential in alkyds as an alternative for cobalt-based drier system.
Note de contenu :	- EXPERIMENTAL : Materials - Synthesis - Formulation of UV-curable alkyd resin - Instrumentation and properties measurement - RESULTS AND DISCUSSION : Fracture toughness - Tensile test - Viscoelastic properties - Coatings properties - Table 1 : Formulation of the long oil and medium oil linseed oil alkyd - Table 2 : Formulation of the methacrylated and acrylated long and medium linseed oil alkyd - Table 3 : Formulation of the glycerol trimethacrylate and glycerol triacrylate - Table 4 : Coating properties of all UV-curable alkyd systems
DOI :	https://doi.org/10.1007/s11998-022-00697-9
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00697-9.pdf?pdf=button
Format de la ressource électronique :	Pdf
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Laboratory automation for new adhesive formulations [texte imprimé] . - 2022 . - p. 14-17.Langues : Multilingue (mul)in ADHESION - ADHESIVES + SEALANTS > Vol. 19, N° 4/2022 (2022) . - p. 14-17

Catégories :	AutomatisationColles:AdhésifsFormulation (Génie chimique)
Index. décimale :	668.3 Adhésifs et produits semblables
Résumé :	The automation of laboratory work in adhesives formulation relieves chemists of manual sample handling and generates solid bases for statistical evaluations. A system was developed and built for the Henkel Adhesive Technologies research center that mixes small quantities of adhesive formluations precisely, and applies these to sample carriers without loss.
Note de contenu :	- Automated system with 21 active modules - Samples size of 80 ml or less - No research without statistics
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Lubricant controlled release silicone fouling release coatings based on mesoporous molecular sieves [texte imprimé] / Jinhua Lei, Auteur ; Zhongzheng Li, Auteur ; Tian He, Auteur ; Zhuqian Wang, Auteur ; Shitao Yao, Auteur ; Huayu Qiu, Auteur . - 2023 . - p. 703-711.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 703-711

Catégories :	AbsorptionCaractérisationLubrifiantsMatériaux mésoporeuxRevêtements -- Propriétés mécaniquesRevêtements antisalissuresSiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).Système de libération contrôlée (technologie)Tamis moléculaires
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Silicone fouling release coatings (FRCs) are biocide-free coatings, and their antifouling performance depends on the nonstick properties and the fouling release behavior. The antifouling performance can be further improved by introducing lubricant into such coatings to form lubricant-infused FRCs (iFRCs). The lubricant will be continuously released to the surface of iFRCs during use, and, in turn, on one hand, the surface of iFRCs will be updated; on the other hand, the attachment of mussels and other organisms will be affected. Inspired by the idea of drug release using porous materials, mesoporous molecular sieves (MMSs), including MCM-41 and SBA-15, were introduced into silicone FRCs in this paper because of their large specific surface area and pore volume. We expected that the release of lubricant could be controlled through MMS in the obtained coatings (iFRC-MMS), so as to obtain FRC with controllable antifouling performance, such as the long-term fouling prevention capacity. Since the release of lubricant usually takes a long time, the effect of MMS on the release of lubricant was studied by an accelerated release test in a good solvent. The surface performance, antifouling performance, and mechanical properties of iFRC-MMS have been studied through the static water contact angle (WCA) measurements, the antidiatom absorption test, and the mechanical performance tests, respectively. Our study demonstrated that: (1) the release of lubricant was indeed affected by MMS in iFRC-MMS as we expected, the release rate can be delayed to a certain extent by both MCM-41 and SBA-15, and (2) there was a compatibility relationship between the pore size of MMS and the molecular size of lubricant, (3) the release of the lubricant was also affected by the molecular weight of lubricant, (4) the intrinsic surface performance and fouling release performance of silicone FRCs were not affected by the introduction of MMS, while the mechanical properties of iFRC-MMS were slightly improved.
Note de contenu :	- MATERIALS AND METHODS : Reagents - Preparation of lubricant infused MMS (i-MMS) - Preparation of FRC with i-MMS (iFRC-MMS) - Characterization of the distribution of MMS in iFRC-MMS - Accelerated release test of lubricant - Performance tests of iFRC-MMS - RESULTS AND DISCUSSION : Lubricant absorption capacity of MMS - Distribution of MMS in iFRC-MMS - Effect of MMS on lubricant release from iFRC-MMS - Effect of the lubricant viscosity on lubricant release from iFRC-MMS - Effect of MMS on the surface performance of iFRC-MMS - Effect of MMS on the antifouling performance of iFRC-MMS - Effect of MMS on the mechanical properties of iFRC-MMS Table 1 : Mechanical properties of iFRC-MMS
DOI :	https://doi.org/10.1007/s11998-022-00702-1
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00702-1.pdf?pdf=button
Format de la ressource électronique :	Pdf
Permalink :	https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39313

"More sustainability is a defining factor for our future" [texte imprimé] / Ingrid Sebald, Personne interviewée . - 2023.Langues : Multilingue (mul)in ADHESION - ADHESIVES + SEALANTS > Vol. 20, N° 1/2023 (2023)

Catégories :	Adhésifs dans les automobilesDurée de vie (Ingénierie)Matériaux -- AllègementRubans adhésifs
Index. décimale :	668.3 Adhésifs et produits semblables
Résumé :	Sustainability is a key topic for many companies in the adhesives industry. Dr. Ingrid Sebald, chief technology officer at Tesa, spoke to adhesion about the company's sustainability targets, the potentials of bio-based raw materials for adhesives, and projects with the automotive industry in which adhesive tapes can reduce vehicle weight and enable components to be recycled.
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One enterprise, one product, one QR code : Hazardous chemical registration in China [texte imprimé] / Bryan Zhou, Auteur . - 2023 . - p. 48-49.Langues : Anglais (eng)in EUROPEAN COATINGS JOURNAL (ECJ) > N° 5 (05/2023) . - p. 48-49

Catégories :	Chimie industrielle -- Législation -- ChineSubstances dangereuses -- Législation -- Chine
Index. décimale :	667.9 Revêtements et enduits
Résumé :	For hazardous chemicals in China, their manufacturers and importers in China must register them with the National Registration Centre of Chemical (NRCC) prior to manufacture or importation.
Note de contenu :	- Hazardous chemical registration - One enterprise, one product, one QR code - Latest implementation status in China - Practical TIPS from CIRS
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Precise, automatic and targeted on the edge [texte imprimé] . - 2022 . - p. 12-14.Langues : Anglais (eng)in INTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 15, N° 2 (2022) . - p. 12-14

Catégories :	Bois -- RevêtementsLaque et laquagePeinture au pistoletPortes -- PeintureProduits chimiques -- Consommation -- RéductionRevêtements -- Application-dosage:Peinture -- Application-dosageRevêtements en phase aqueuseRevêtements organiquessolvants
Index. décimale :	667.9 Revêtements et enduits
Résumé :	For door edges with a wide variety of shapes, the lacquer is not applied with rollers, but by but by spray painting. In the process, some of the lacquer misses the mark, dirties the door leaf surface and has to be washed off with solvent. A supplier of supplier of interior doors, together with a machine builder, set out to find a more environmentally friendly environmentally friendly solution that would also save costs. The result : A reduction of cleaning solvent use by 15-20 tons per year.
Note de contenu :	- Looking for an environment-friendly solution - Jig system with tolerance of a tenth of a millimeter - New water-based coating tested first - Challenges when drafting the contract - Fig. 1 : Everyday work in door coating : A wide variety of different functional doors with versatile edge profiles - Fig. 2 : The spraying jig protects door leaves from coating material splatters
DOI :	https://doi.org/10.1007/s35724-022-0543-1
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Preparation and antiaging performance of urushiol-titanium polymer/a-zirconium phosphate composite coatings [texte imprimé] / Guocai Zheng, Auteur ; Pingfei Wu, Auteur ; Xiaoxiao Zheng, Auteur ; Fencai Lin, Auteur ; Qi Lin, Auteur ; Yanlian Xu, Auteur . - 2023 . - p. 535-543.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 535-543

Catégories :	AnticorrosionCaractérisationCompositesEssais accélérés (technologie)Phosphate de zirconiumPolymères organiques-inorganiquesRevêtements -- Propriétés mécaniquesRevêtements organiquesRevêtements protecteurs
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Anti-corrosion coatings often fail due to aging effects. Therefore, taking advantage of the positive effects of multilayer structure of a-zirconium phosphate (α-ZrP) on the anti-aging properties of coatings, organic–inorganic composite materials based on a-ZrP were synthesized. Firstly, a-ZrP was synthesized by a hydrofluoric acid precipitation method. Then, CT-ZrP was prepared by a-ZrP, pre-intercalated successively with cholamine and cetyltrimethylammonium bromide (CTAB). The synthesized CT-ZrP was then used for synthesizing urushiol-titanium polymer/ZrP composite coatings (M-ZrP) through intercalation. The results of XRD, TEM, and FTIR proved the successful intercalation of α-ZrP and the loss of layering M-ZrP composite coatings in the process of exfoliation. TG results showed that the thermal stability of M-ZrP3 (3 wt% CT-ZrP) was higher than that of urushiol-titanium polymer (UTP). After 1000 h of accelerated aging, 3 wt% of CT-ZrP could significantly improve the anti-aging property of the UTP coating, and the maximum rate of gloss loss was the lowest (5.9%).
Note de contenu :	- INTRODUCTION : Experimental - Preparation of a-ZrP - Preparation of CA-ZrP - Preparation of CT-ZrP - Preparation of M-ZrP - General characterization - Mechanical measurement - Accelerated aging test - RESULTS AND DISCUSSION : Morphological and structural analyses - Morphology of M-ZrP3 nanocomposite - Thermal stabilities of nanocomposite coatings - Antiaging performance of nanocomposite coatings - Mechanical properties of nanocomposite coatings - Table 1 : TGA data of UTP and M-ZrP3 - Table 2 : Elemental composition of M-ZrP3 coating before accelerated aging - Table 3 : Elemental composition of M-ZrP3 coating after accelerated aging - Table 4 : Mechanical properties of coatings
DOI :	https://doi.org/10.1007/s11998-022-00686-y
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00686-y.pdf?pdf=button
Format de la ressource électronique :	Pdf
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Preparation of PEO/polymer coatings on aluminum alloy with antifouling properties [texte imprimé] / Ulyana Kharchenko, Auteur ; I. Beleneva, Auteur ; V. Egorkin, Auteur ; I. Vyalyi, Auteur ; N. Izotov, Auteur ; A. T. Tsvetnikov, Auteur ; A. Karpenko, Auteur ; Chi V. Nguyen, Auteur . - 2023 . - p. 763-779.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 763-779

Catégories :	BactériesCaractérisationElectrochimieMétaux -- Revêtements protecteursMicrocapsulesPolyacryliquesPolyènesPolyène est le nom générique des composés organiques polyinsaturés qui possèdent au moins 2 doubles liaisons carbone-carbone et au moins 5 carbones.Polyéthylène glycolPolytétrafluoréthylèneProduits naturelsRevêtement autopolissantRevêtements -- Propriétés mécaniquesRevêtements antisalissuresRevêtements organiques
Index. décimale :	667.9 Revêtements et enduits
Résumé :	A study on the development of an effective composition of polymeric antifouling coating based on acrylic copolymer with microencapsulated extract of natural origin and superdispersed polytetrafluoroethylene was carried out. A Raman spectroscopy study of the bacterial extract composition showed that the main component was a polyene pigment with 5 conjugated bonds. Encapsulation of ethyl acetate extract of Pseudoalteromonas piscicida 2202 was carried out, two types of microcapsules containing the microbial extract were obtained, and their morphology and efficiency of antifouling action in the coating were studied. Comprehensive studies of antifouling, anticorrosion, and mechanical properties of the coatings allowed identification of the most effective composition providing long-term protection in combination with satisfactory mechanical properties. It is shown that the use of silica nanocapsules with microbial extract in the coating is more effective for enhanced antifouling and mechanical performance.
Note de contenu :	MATERIALS AND METHODS : Materials - PEO process - Preparation of bacterial extract - Raman spectroscopy of P. piscicida 2202 extract - Encapsulation of P. piscicida 2202 extract in silica nanocapsules and poly(urea–formaldehyde) microcapsules - Preparation of organic topcoat - Field tests - Electrochemical study - Mechanical properties measurements - Surface characterization - RESULTS AND DISCUSSION : Characterization of bacterial extract by Raman spectroscopy - Characterization of SiNCs and PUF-microcapsules - Field immersion - Electrochemical measurements - Mechanical performance of paints - Comparative evaluation of coatings - Table 1 : Table 1 Composition of prepared coatings
DOI :	https://doi.org/10.1007/s11998-022-00706-x
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00706-x.pdf?pdf=button% [...]
Format de la ressource électronique :	Pdf
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Preparation of polyurethane coating formulation based on dihydropyridine derivatives as an insecticide and antifungal additives for surface coating applications [texte imprimé] / Mohamed A. Awad, Auteur ; N. M. Saleh, Auteur ; M. M. Elsawy, Auteur ; Salem S. Salem, Auteur ; H. Abd El-Wahab, Auteur . - 2023 . - p. 521-533.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 521-533

Catégories :	AntifongiquesCaractérisationDihydropyridineFormulation (Génie chimique)InsecticidesPolyuréthanesRevêtement de surfaceRevêtements -- Propriétés mécaniquesRevêtements -- Propriétés physiquesVernis -- AdditifsVernis bi-composant
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Pyridine derivatives are prepared and evaluated before being incorporated into polyurethane coating formulations to create antifungal and insecticidal coating compositions. Different analyses, including Fourier transform infrared (FTIR), mass, proton nuclear magnetic resonance (1HNMR), and carbon-13 nuclear magnetic resonance (13C NMR) spectra, were used to confirm the synthesized compounds. The material has been coated using a polyurethane coating mixture. Gloss, scratch resistance, flexibility, and adhesion are some of the coating attributes investigated; mechanical capabilities include impact resistance and shore hardness, and physicochemical properties such as chemical resistance of coated polyurethane (PU) samples are also investigated. PU coatings were applied to substrates to measure coating properties. The mechanical properties of the PU cast films were measured. The results of the experiments revealed that all PU coatings based on dihydropyridine derivatives had good scratch resistance which varied from > 1.5 to > 2 kg. While reducing gloss value varied from 65 to 85, there is no effect of the prepared compounds in the other mechanical test. These PU coatings have excellent chemical resistance except the alkali resistance as evidenced by their physicochemical properties. The observed antifungal and insecticide activities indicated that dry wood coated with PU based on dihydropyridine derivatives is promising for resistance to these insects and fungi, in comparison with the paint as blank. The results revealed that the inhibition zones diameter by compound 2 were 25.1 ± 0.69, 23.2 ± 0.94, 20.16 ± 0.62, 20 ± 0.80, and 18 ± 0.81 mm against A. terreus, A. niger, A. flavus, C. albicans, and A. fumigatus, respectively, whereas the inhibition zones (IZ) diameter by compound 3 were 22.56 ± 0.30, 21.03 ± 0.49, 21.03 ± 0.61, 21 ± 0.66, and 20 ± 0.78 mm versus A. niger, A. fumigatus A. flavus, C. albicans, and A. terreus, respectively. The ordering activity against insects increased as the dose concentration of the pyridine derivatives was increased.
Note de contenu :	- MATERIALS AND METHODS : Materials - Methods and technique - 6-Diamino-4-(2-bromophenyl)-2-oxo-1,2-dihydropyridine-3,5-dicarbonitrile (2) - 6-Amino-1-((2-bromobenzylidene)amino)-4-(4-hydroxy-3-methoxyphenyl)-2-oxo-1,2-dihydropyridine-3,5-dicarbonitrile (3) - Characterization of the prepared organic compound by spectral analysis - Application of the Insecticide-based PU (polyurethane) varnish and Control PU (polyurethane) varnish - Characterization techniques - Antifungal activity of pyridine derivatives (2 and 3) - Characterization of insects - Bioassay with paint - STATISTICAL ANALYSIS OF DATA - RESULTS AND DISCUSSION : Characterization of the prepared polyurethane varnish embedded with pyridine derivatives as antifungal and insecticide agents - Physical and mechanical characteristics of the coated films by PU (polyurethane) varnish embedded with the prepared additives - Antifungal activity - Adulticidal assay of the prepared pyridine derivatives - Table 1 : Formulation of two pack high gloss polyurethane varnish incorporated with dihydropyridine derivatives - Table 2 : Physical and mechanical characteristics of the coated films by PU varnish embedded with the prepared additives - Table 3 : Chemical resistance of pure PU varnish and PU incorporated with dihydropyridine derivatives - Table 4 : Insecticide activity of 2 and 3 against adult house fly Musca domestica and calculated LC50(LC90) after 72 h of mortalityTable 5 Insecticide activity of 2 and 3 incorporated with PU varnish against adult of house fly Musca domestica and calculate LC50(LC90) after 72 h of mortality
DOI :	https://doi.org/10.1007/s11998-022-00684-0
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00684-0.pdf?pdf=button% [...]
Format de la ressource électronique :	Pdf
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Protective finish for use in the arctic circle [texte imprimé] . - 2022 . - p. 8-11.Langues : Anglais (eng)in INTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 15, N° 2 (2022) . - p. 8-11

Catégories :	Ateliers de peinture industriellePrimaire (revêtement)Résistance aux conditions climatiquesRevêtements -- Appareils et matériels:Peinture -- Appareils et matérielsRevêtements -- Finition:Peinture -- FinitionRevêtements protecteurs
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Coating technology plays a special role in outdoor machines, some of which are used in the Artic Circle. A manufacturer of municipal equipment is therefore focusing on this area when modernizing its production. Products for material management have a key function here in terms of speed and quality of the coating process.
Note de contenu :	- Wide product range, diverse range of application - Expansion and modernisation of the surface coating - Mixing, pumping, spraying - Fig. 1 : Rasoc paint booth for topcoating with the multi-component metering units and the paint supply piston pumps - Fig. 2 : The primer coating is applied with air-assisted spray guns - Fig. 3 : Riscos paint booth for priming with the multi-component mixing systems and the paint supply piston pumps
DOI :	https://doi.org/10.1007/s35724-022-0544-0
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Pursue greener : Sustainable CNSL- based diluent for high-performance low-VOC protective coatings [texte imprimé] / Hong Xu, Auteur ; Joseph Mauck, Auteur ; James Zhao, Auteur . - 2023 . - p. 36-43.Bibliogr.Langues : Anglais (eng)in EUROPEAN COATINGS JOURNAL (ECJ) > N° 5 (05/2023) . - p. 36-43

Catégories :	AnticorrosionDiluantsEpoxydesFormulation (Génie chimique)Noix de cajou et constituantsPrimaire (revêtement)Résistance chimiqueRevêtements -- Propriétés mécaniquesRevêtements en phase aqueuse -- Additifs
Index. décimale :	667.9 Revêtements et enduits
Résumé :	A novel multi-functional epoxy diluent has been developed based on natural and non-food chain cashew nutshell liquid (CNSL) to help formulators create high-performance protective coatings with a lower carbon footprint. Performance testing revealed benefits in VOC reduction and greater flexibility as well as improved resistance.
Note de contenu :	- Experimental - Multi-functional diluents have lower impact on reactivity - Improved chemical resistance indicate broader application possibilities - Corrosion resistance retained with multi-functional diluents - Special application as a modifier in water-borne epoxy systems - Flexible systems with good tensile strength - New diluent reduces viscosity and offers added benefits - Table 1 : Technical data of diluents used in this study - Table 2 : Technical data of curing agents in this study - Table 3 : Formulation of pigmented epoxy primers with vairous diluents - Table 4 : Formulations of water-borne epoxy screed systems
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Réduire la reprise et la consommation de poudre [texte imprimé] . - 2020.Langues : Français (fre)in GALVANO ORGANO > N° 881 (03/2020)

Catégories :	Coût -- ContrôleEpaisseur -- MesureMesure -- InstrumentsMesures dimensionnelles sans contactProduits chimiques -- Consommation -- RéductionRevêtements poudre:Peinture poudreUltrasons
Index. décimale :	667.9 Revêtements et enduits
Résumé :	La mesure systématique de l'épaisseur des revêtements en poudre pour réduire au minimum leur épaississement est un moyen simple d'obtenir d'importants avantages environnementaux. Les appareils à ultrasons portatifs sont la solution idéale pour effectuer de telles mesures de revêtement sans contact.
Note de contenu :	- Mise à disposition d'appareils de mesure portatifs à ultrasons pendant 20 ans - Comparaison avec d'autres procédés de mesure - Mesures faciles, même sur des surfaces courbes - Peu d'inconvénients par rapport à la mesure ultrasonique de l'épaisseur du revêtement par poudre - Economiser la poudre et éviter les retravaillages et les pannes - Mesure de l'épaisseur du revêtement en poudre sur les panneaux de façade - PLUS GRAND POTENTIEL DE REDUCTION DES IMPACTS ENVIRONNEMENTAUX ET D'ECONOMIE D'ARGENT : Ces hypothèses étaient les suivantes - LES AVANTAGES DE LA MESURE SYSTEMATIQUE DES REVÊTEMENTS EN POUDRE : Economies de poudre - Prévention des anomalies - Un avantage important pour l'environnement - CONCLUSION : Réduire les coûts et protéger l'environnement - Fig. 1 : Les apapreils à ultrasons portatifs peuvent produire des mesures fiables même sur des surfaces courbes, comme ce cadre de vélo - Fig. 2 : Exemple de panneaux de façade revêtus de poudre sur la commune de Volketswil, en Suisse - Fig. 3 : Image d'un revêtement en poudre non durci prise au microscope. Si le revêtement recouvre la surface, l'aspect visuel du revêtement sera le même sur une large gamme d'épaisseurs - Fig. 4 : Consommation hebdomadaire de poudre - Tableau 1 : Consommation hebdomadaire de poudre avec et sans récupération - 775 kg de poudre utilisée, 525 kg sur le produit, 250 kg gaspillés
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Reliable adhesion on snow [texte imprimé] / Claude Hosotte, Auteur ; Ronny Ebling, Auteur ; Raphael Schaller, Auteur . - 2022 . - p. 22-26.Langues : Multilingue (mul)in ADHESION - ADHESIVES + SEALANTS > Vol. 19, N° 4/2022 (2022) . - p. 22-26

Catégories :	Adhésion métal/polymèreAluminiumL'aluminium est un élément chimique, de symbole Al et de numéro atomique 13. CÂ’est un métal pauvre, malléable, de couleur argent, qui est remarquable pour sa résistance à lÂ’oxydation13 et sa faible densité. C'est le métal le plus abondant de l'écorce terrestre et le troisième élément le plus abondant après l'oxygène et le silicium ; il représente en moyenne 8 % de la masse des matériaux de la surface solide de notre planète. L'aluminium est trop réactif pour exister à l'état natif dans le milieu naturel : on le trouve au contraire sous forme combinée dans plus de 270 minéraux différents, son minerai principal étant la bauxite, où il est présent sous forme dÂ’oxyde hydraté dont on extrait lÂ’alumine. Il peut aussi être extrait de la néphéline, de la leucite, de la sillimanite, de l'andalousite et de la muscovite. L'aluminium métallique est très oxydable, mais est immédiatement passivé par une fine couche d'alumine Al2O3 imperméable de quelques micromètres d'épaisseur qui protège la masse métallique de la corrosion. On parle de protection cinétique, par opposition à une protection thermodynamique, car lÂ’aluminium reste en tout état de cause très sensible à l'oxydation. Cette résistance à la corrosion et sa remarquable légèreté en ont fait un matériau très utilisé industriellement. L'aluminium est un produit industriel important, sous forme pure ou alliée, notamment dans l'aéronautique, les transports et la construction. Sa nature réactive en fait également un catalyseur et un additif dans l'industrie chimique ; il est ainsi utilisé pour accroître la puissance explosive du nitrate d'ammonium.Assemblages collésAssemblages multimatériauxColles:AdhésifsEpoxydesRevêtements multicouchesSkisStratifiés
Index. décimale :	668.3 Adhésifs et produits semblables
Résumé :	Skis should be robust against humidity and temperature fluctuations and have a long service life. Reliable adhesion in multi-material laminates can be achieved by employing high-performance multi-layer adhesive films. They significantly reduce the failure rate, thereby eliminating delamination between aluminum and the glass fiber-reinforced epoxy.
Note de contenu :	- Failures due to low adhesion - Methods from the automotive industry - Manufacturing of multi-material laminates - Table 1 : Overview of manufactured and tested multi-material laminates (ML). The layout and preparation of the laminates are identical. The pretreatment of the aluminum alters - Table 2 : Overview of the initial maximum and average peel resistances of the laminates. The start for peeling is located between the aluminum top chord and the epoxy - Table 3 : Overview of maximum and average peel resistances after the alternating climate cycle test (VW PV 1200). The starting position for peeling is located between the aluminum top chord and the glass epoxy
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Robot takes paints faster to series production [texte imprimé] . - 2022 . - p. 24-25.Langues : Anglais (eng)in INTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 15, N° 2 (2022) . - p. 24-25

Catégories :	Ateliers de peinture industrielleRevêtements -- Appareils et matériels:Peinture -- Appareils et matérielsRobots industrielsSMED, MéthodeLa méthode SMED a pour objet de réduire le temps d'un changement de série et de permettre ainsi de réduire la taille de lot minimale. Cette méthode de "changement rapide dÂ’outil" a été mise au point par Shigeo Shingo ; pour le compte de l'entreprise Toyota. SMED est l'abréviation de l'anglais japonais single-minute exchange of die(s), littéralement "changement de matrice(s) en une seule minute". Étant erronée, l'expression single-minute exchange a été corrigée en single-digit minute exchange, c'est-à-dire "changement en minutes à un seul chiffre", soit "de 1 à 9 minutes" ou encore "en moins de dix minutes". Si les temps de changement de série deviennent nuls, on peut alors envisager une fabrication à l'unité sans augmenter les coûts. Lors d'un changement de fabrication, la partie mise en train (l'amorce de la fabrication) peut représenter une part importante dans la fabrication ; et la partie mise en train n'est pas productive. Le but est de diminuer ce temps consacré au réglage, afin d'obtenir des changements d'outils rapides ou des réglages instantanés. On distingue deux types de réglage : réglages / temps internes : ils correspondent à des opérations qui se font machine arrêtée, donc hors production ; réglages / temps externes : ils correspondent à des opérations qui se font (ou peuvent se faire) machine en fonctionnement, donc en production. La méthode se déroule en quatre étapes : - Identification des réglages internes et externes - Séparation des réglages internes et des réglages externes - Transformation de réglages internes en réglages externes - Rationalisation de tous les aspects de l'opération de changement (Wikipedia)
Index. décimale :	667.9 Revêtements et enduits
Résumé :	While robots have become an integral part of many painting lines in the automotive industry, the development of paints and coatings still mostly relies on manuel processes. For the first time, a paint manufacturer has now implemented an industrial robot in its technical center to create a flexible test application that closely reflects its customers' processes. This allows validations to be significantly accelerated.
Note de contenu :	- Flexibility adaptable to different customer requirements - Validations significantly accelerated - Fig. 1 : The core element of the paint manufacturer's new test application is the paint robot equipped with different paint guns and a high-speed rotary atomizer - Fig. 2 : It allow the company to paint more complex 3D parts, which previously had to be painted manually, in an automated fashion - Fig. 3 : Thanks to a quick-change system, the various atomizers can be exchanged in no time. A controlled system for the supply of one- and two-component coatings is also available
DOI :	https://doi.org/10.1007/s35724-022-0541-3
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Role of adhesives in sustainable packaging [texte imprimé] / Dietrich Crail, Auteur . - 2023 . - p. 12-16.Langues : Multilingue (mul)in ADHESION - ADHESIVES + SEALANTS > Vol. 20, N° 1/2023 (2023) . - p. 12-16

Catégories :	Adhésifs -- EmballagesAliments -- EmballagesDurée de vie (Ingénierie)Emballages -- LégislationMatériaux -- Propriétés barrièresProduits commerciaux -- Etiquetage
Index. décimale :	668.3 Adhésifs et produits semblables
Résumé :	Adhesives are the hidden enabler of sustainable consumer packaging. Coming under scrutiny in Europe, as legislators and brands critically assess their packaging, adhesives are often viewed as a hinderance to circular economy aims. Yet, adhesives enable recycling, facilitate materials reuse and are integral to packaging that extends shelf-life, reducing food waste. As brands and governments work towares a more sustainable future, how should they view adhesives ?
Note de contenu :	- New packaging and packaging waste directive - Goals and regulations - Materiality assessments - Shift in packaging materials - Sustainability forces - Adhesives solutions for sustainable packaging - Beverage labelling - Pallet stabilization - Beverage multipacks - Ezsy to open e-commerce packaging - Water-based barrier coatings - Flexible packaging - Advancing manufacturing efficiency - Fossil-free technologies
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Slippery lubricant-infused intertwining superhydrophobic matrix: preparation and enhanced resistance against abiotic corrosion and microbiologically influenced corrosion [texte imprimé] / Yinsha Wei, Auteur ; Yizhen Yu, Auteur ; Yunxiang Wang, Auteur ; Yuekun Jing, Auteur ; Hongge Gao, Auteur ; Bingzhi Li, Auteur ; Shugang Hu, Auteur ; Ri Qiu, Auteur ; Yibo Ouyang, Auteur . - 2023 . - p. 647-660.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 647-660

Catégories :	Acier au carboneAnticorrosifsAnticorrosionCaractérisationChimie biomimétiqueCorrosionEssais de brouillard salinHydrophobieLubrifiantsMétaux -- Revêtements protecteursSiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).
Index. décimale :	667.9 Revêtements et enduits
Résumé :	The corrosion of carbon steel (CS) is a disastrous threat to artificial engineering in harsh environments, such as underground mines and seawater environments. Herein, we employed facile one-step electrodeposition to prepare a superhydrophobic intertwining structure on a CS surface in an effort to alleviate corrosion. Sophisticated characterization methods suggested that La tetradecanoate formed during the electrodeposition process via an electrochemical reduction reaction. Silicone lubricant acted as the insoluble phase and was infused into the superhydrophobic matrix to yield a biomimetic slippery lubricant-infused surface (LIS) due to the capillary effect from the superhydrophobic intertwining structure to the lubricant phase. Using natural seawater, salt spray and sulfate-reducing bacteria (SRB) suspension as the harsh media, LIS shows excellent corrosion resistance to the underlying metal compared with bare CS and the superhydrophobic surface covering CS because the oil phase acts as a barrier to inhibit the penetration of corrosive species. For the LIS sample after seawater immersion for 20 d, the Icorr was approximately 2 orders of magnitude smaller than that of the bare CS. In addition, after a 5.0 wt% salt spray test for 20 d, the |Z|0.01 Hz of the LIS surface was ca. 3 orders of magnitude larger than that of CS. Furthermore, when immersed in an extremely harsh SRB suspension for 15 d, the |Z|0.01 Hz of LIS was ca. 3 orders of magnitude larger than that of bare CS because LIS can dually prohibit the bioattachment of SRB and avoid the penetration of the highly corrosive metabolite. Thus, the LIS was proven to have prominent anticorrosion properties in harsh corrosive environments.
Note de contenu :	- Preparation of SHS and LIS onto CS - Morphology, composition and wettability characterization - Corrosion inhibition measurement in different environments - Evaluation of bio-attachment and corrosion inhibition of the coatings in sulfate-reducing bacteria (SRB) suspension - Table 1 : The electrochemical parameters of bare CS, SHS and LIS revealed by potentiodynamic polarization curves during immersion in seawater - Table 2 : The electrochemical parameters of CS and LIS were revealed by potentiodynamic polarization curves after exposure to 5.0 wt% salt spray for certain periods - Table 3 : The electrochemical parameters of CS and LIS were revealed by potentiodynamic polarization after being immersed in the SRB suspension for certain periods
DOI :	https://doi.org/10.1007/s11998-022-00698-8
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00698-8.pdf?pdf=button% [...]
Format de la ressource électronique :	Pdf
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Sol-gel-technology in praxis [texte imprimé] / Gerhard Jonschker, Auteur . - Hannover (P.O. Box 62 47, 30062, Germany) : Vincentz Network GmbH & Co., 2014 . - 224 p. : ill. ; 27 cm. - (European Coatings Library) .ISBN : 978-3-86630-886-2 : 139 EIndex - Bibliogr.Langues : Anglais (eng)

Catégories :	NanoparticulesNanotechnologieRevêtements:PeintureSol-gel, Procédé
Index. décimale :	667.9 Revêtements et enduits
Résumé :	THE MISSION : To understand how sol-gel-technology works in praxis and how to successfully apply it in laboratory, with just the right amount of theory — not to much and not too little. Simplifie in such a way that, in view of the pressure to deliver results in industrial and institutional research environments, it can be read quickly and the knowledge gained can be immediately translated into concrete solutions. THE AUDIENCE : Hands-on beginners who avant to develop a basic understanding of sol-gel and nano-technology by working through specific recipes on routine laboratory issues. Advanced fornnulators seeking a practical guide that will lead them straight to implementable solutions. THE VALUE : Finally, a book on the topic of sol gels that focuses on practical application. With 61 real-life examples drawn from patent literature and accompanying explanations and interpretations, you will gain a basic understanding of how sol-gel-technology works in praxis.
Note de contenu :	1. What is sol-gel and nanotechnology ? 2. Synthesis of nanomaterials 3. Properties and processing of nanoparticles 4. Application of nanoparticles in paints and coatings 5. Coating resins made by nanotechnology - the sol-gel process 6. Application, drying and densification 7. Health, safety and and environmental aspects of nanoparticles
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Solutions for sustainable aromatic hydrocarbon tackifiers [texte imprimé] / Matthias Steffen, Auteur . - 2023 . - p. 26-28.Langues : Multilingue (mul)in ADHESION - ADHESIVES + SEALANTS > Vol. 20, N° 1/2023 (2023) . - p. 26-28

Catégories :	BiomatériauxColles:AdhésifsComposés aromatiquesDéveloppement durableHydrocarburesProduits et matériaux recyclésTackifiant (adhésifs)
Index. décimale :	668.3 Adhésifs et produits semblables
Résumé :	Sustainability and climate protection are key issues for the adhesives industry and a driver of new developments and approaches. The development of products made directly from sustainable, bio-based or recycled raw materials is needed to make the chemical industry more sustainable. In the case of aromatic resins, sustainable products have been missing so far.
Note de contenu :	- ISCC PLUS certified hydrocarbon resins - Increasing sustainability through process innovation - Increased sustainability in the supply chain
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Surface modification techniques of magnesium-based alloys for implant applications [texte imprimé] / Vinod Kumar Mahto, Auteur ; Arvind Kumar Singh, Auteur ; Anup Malik, Auteur . - 2023 . - p. 433-455.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 433-455

Catégories :	BiomatériauxImplants médicauxMagnésium -- AlliagesMatériaux -- Propriétés mécaniquesTraîtements de surface
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Biodegradable materials like magnesium-based alloys are widely employed for making implants. Mg-based alloys show good biocompatibility, biodegradability, and mechanical properties similar to bone material unlike other commonly used implant materials, i.e., stainless steel, titanium, and Co–Cr alloy, which have negligible degradation rates and require revision surgery for the removal of the implant. Magnesium alloy-based implant has high degradation rates and avoids the need for a second surgery. But high degradation rates and poor mechanical properties in magnesium alloys also pose a challenge to their use as implant material. In the absence of controlled degradation, they can degrade completely before serving their intended purpose in the human body. Several surface modification techniques are used to control the degradation rates. Surface coating is one of the methods of surface modification. This paper discusses various types of surface coating techniques for magnesium-based alloys. This paper also discusses the future scope of surface technology of magnesium-based implant materials.
Note de contenu :	- TYPES OF MEDICAL IMPLANTS - BASIC REQUIREMENTS OF A SUITABLE IMPLANT MATERIAL - COMMONLY USED MATERIALS FOR IMPLANT APPLICATIONS - IMPORTANCE OF MAGNESIUM ALLOY FOR IMPLANT APPLICATIONS : Designation of magnesium alloys - Mechanical properties analysis of Mg with other metallic implants - Advantages and disadvantages of Mg alloys - Need of surface modification in magnesium-based implant materials - VARIOUS SURFACE MODIFICATION TECHNIQUES OF MAGNESIUM-BASED ALLOYS : Conversion coatings - Non-conversion coatings - CONCLUSIONS AND FUTURE SCOPE : Surface morphology - Corrosion rate - Materials used for coating - Mechanical behavior - Type of method used for coating - Table 1 : Important properties of implant material - Table 2 : Commonly used materials for implant applications - Table 3 : Abbreviation used for alphanumeric designation of various alloys of magnesium - Table 4 : Alphanumeric designation of magnesium alloys (example of AZ31B in parentheses) - Table 5 : Mechanical properties of implant materials - Table 6 : Advantages of Mg-based alloys - Table 7 : Disadvantages of Mg-based alloys - Table 8 : Various coating materials reviewed in this paper - Table 9 : Different coating processes, substrate materials, coating materials, related advantages, and disadvantages
DOI :	https://doi.org/10.1007/s11998-022-00716-9
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00716-9.pdf?pdf=button% [...]
Format de la ressource électronique :	Pdf
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Synthesis of PET-based urethane-modified alkyd resins from depolymerization intermediates of post-consumer PET bottles: coating properties and thermal behaviors [texte imprimé] / Cavusoglu Ferda Civan, Auteur ; Isil Acar, Auteur . - 2023 . - p. 741-761.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 741-761

Catégories :	Alkyde modifié uréthaneBouteilles en matières plastiques -- RecyclageDépolymérisationFourier, Spectroscopie infrarouge à transformée deMatières plastiques -- DéchetsPolyéthylène téréphtalatePolymères -- SynthèseRésistance chimiqueRevêtement de surfaceRevêtements (produits chimiques)Revêtements -- Propriétés physiquesRevêtements -- Propriétés thermiquesRevêtements organiquesThermogravimétrie
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Urethane-modified alkyd resins were synthesized using the depolymerization intermediates obtained from simultaneous hydrolysis–glycolysis reactions of post-consumer poly(ethylene terephthalate) (PET) bottles with dipropylene glycol (DPG) and water. For this aim, first, the synthesis of a four-component reference alkyd resin having an oil content of 50% was synthesized by using tall oil fatty acid (TOFA), trimethylolpropane (TMP), phthalic anhydride (PA), and dipropylene glycol (DPG). The PET-based alkyd resins were also synthesized using different amounts and types of purified and fractionated depolymerization intermediates (water-insoluble fraction, WIF, and water-soluble and crystallizable fraction, WSCF) under the same reaction conditions. For the synthesis of PET-based alkyd resins, the depolymerization intermediates were used partially or completely instead of dibasic acid and/or diol components in alkyd resin formulations. In order to determine the optimum modification ratio for urethane-modified alkyd resin synthesis, the reference alkyd resin was reacted with toluene diisocyanate (TDI) at different molar ratios (NCO/OH: 1/1, 1/2, and 1/3), and the optimum NCO/OH ratio was determined as 1/1, according to the surface coating properties. And, then, all PET-based urethane-modified alkyd resins were prepared by the modification reactions of the PET-based alkyd resins with TDI at an optimum ratio. At the end of the study, it was observed that the use of waste PET intermediates (WIF or WSCF) did not cause any negative effects on physical/chemical surface coating and thermal properties ; on the contrary, some properties were obtained as superior than that of the reference resin. In conclusion, it seems possible to use PET-based urethane-modified alkyd resin could be used as a cheap, environmentally friendly, and relatively economic binder component in synthetic paint formulations. In the synthesis of urethane-modified alkyd resin, using a certain amount of waste PET intermediate instead of dibasic acid and/or diol component will reduce raw material costs and also benefit the environment by re-evaluation of recycled PET. Thus, it could be both possible to recycle of post-consumer PET bottles, which are a valuable waste, and to provide cheap raw materials without compromising its features for paint formulations. These results are remarkable in terms of sustainability and waste management besides are also important for the economy and paint industry.
Note de contenu :	- MATERIALS AND METHODS : Materials - Instruments - Methods - FTIR analyses - Surface coating properties - Thermal analyses - RESULTS AND DISCUSSION : FTIR analysis results - Surface coating tests results - TGA analysis results - Table 1 : Depolymerization reactions conditions and properties of the depolymerization intermediates - Table 2 : Symbols and compositions of the four-component alkyd resins used in the synthesis of the urethane-modified alkyd (UA) resins - Table 3 : Symbols, components, and modification ratios of the urethane-modified alkyd (UA) resins - Table 4 : Drying stages and physical surface coating properties of the reference urethane-modified alkyd (UA) resins - Table 5 : Chemical surface coating properties of the reference urethane-modified alkyd (UA) resins - Table 6 : Drying time test results of the urethane-modified alkyd (UA) resins - Table 7 : Physical surface coating properties of the urethane-modified alkyd (UA) resins - Table 8 : Alkali resistance test results of the urethane-modified alkyd (UA) resins - Table 9 : Acid resistance, salt-water resistance, and environmental resistance test results of the urethane-modified alkyd (UA) resins - Table 10 : Water resistance test results of the urethane-modified alkyd (UA) resins - Table 11: Solvent resistance test results of the urethane-modified alkyd (UA) resins - Table 12 : The temperatures required for reaching certain weight losses (%)
DOI :	https://doi.org/10.1007/s11998-022-00705-y
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00705-y.pdf?pdf=button% [...]
Format de la ressource électronique :	Pdf
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The footprints of printing inks : Inks and coatings contribute significantly to the carbon footprint of a print product [texte imprimé] / Michael Has, Auteur . - 2023 . - p. 28-31.Bibliogr.Langues : Anglais (eng)in EUROPEAN COATINGS JOURNAL (ECJ) > N° 5 (05/2023) . - p. 28-31

Catégories :	Bilan des émissions de gaz à effets de serreEco-conceptionEncre d'imprimerie
Index. décimale :	667.9 Revêtements et enduits
Résumé :	We look at the carbon footprint (CF) of print products and the contribution of ink versus substrate. The ink’ s CF is, amongst other factors, a function of the coverage (COV) of the printed product. A basic analysis shows that ink and substrate contributions to the printed product CF are possibly of equal magnitude. Data available in literature were used for the quantitative analysis. The relevance of the resulting data and means for ecodesign are discussed.
Note de contenu :	- Methods and equations - Carbon footprint calculation - Discussion - A practical example - Existing print applications - Ecodesign - Table 1 : Parameter for an example-application to calculate an assumed break-even point at which the CF of ink and paper are equal in sheet-fed offset - Table 2 : Market data on print products [9]. * Note that, in packaging, high coverages are often used, but printing on both sides of a substrate is rare
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The reduction in ice adhesion using controlled topography superhydrophobic coatings [texte imprimé] / Yujie Wang, Auteur ; Jinde Zhang, Auteur ; Hanna Dodiuk, Auteur ; Samuel Kenig, Auteur ; Jo Ann Ratto, Auteur ; Carol Barry, Auteur ; Joey Mead, Auteur . - 2023 . - p. 469-483.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 469-483

Catégories :	AdhésionCaractérisationEpoxydesFluoroalkylsilaneHydrophobieInterfaces solide-liquideLiantsMouillage (chimie des surfaces)NanoparticulesRevêtements organiquesSiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux. La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...). Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.Topographie
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Since ice formation on surfaces at subzero temperatures leads to accidents, increased equipment maintenance costs, and reduced performance, multiple strategies, including superhydrophobic surfaces and coatings, have been explored as means to reduce ice adhesion to solid surfaces. Previous work has correlated the effect of topography of regularly patterned superhydrophobic surfaces with ice adhesion. This work, however, investigated the effect of filtered topography on ice adhesion for random superhydrophobic surfaces. The ice adhesion behavior of superhydrophobic composite coatings, prepared from a mixture of silica nanoparticles and polymer binder and sprayed on glass slides, was determined using a shear strength measurement. The ice adhesion significantly decreased with an increase in particle content up to 40 wt.%, after which the ice adhesion became nearly constant. The present study focuses on the use of a novel filtering method for coating topography evaluation which isolated the asperities contributing to the interface from the roughness profile in the superhydrophobic coating. It showed that the ice adhesion correlated with the filtered asperity height and spacing for these random hydrophobic surfaces. Higher particle contents led to larger asperity distances, smaller solid fractions, and lower ice adhesion. The results and conclusions are based on a static ice adhesion test using still water. In this work, it is demonstrated that ice adhesion can be predicted based on the solid–water–air interface, a correlation that could guide future superhydrophobic coating fabrication to create surfaces with greater reduction in ice adhesion.
Note de contenu :	- Materials - Preparation of SHP coatings - Surface wetting characterization - Visualization of solid-water interface - Ice shear adhesion strength measurement - Topography characterization - Table 1 : Composition of SHP coatings with different particle contents - Table 2 : Measured topographical parameters of defined asperities and particle content - Table 3 : Definition of design parameters in this work - Table 4 : Design parameters for the SHP surfaces
DOI :	https://doi.org/10.1007/s11998-022-00682-2
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00682-2.pdf?pdf=button% [...]
Format de la ressource électronique :	Pdf
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Trace components by fingerprint every second [texte imprimé] / Alexander Förste, Auteur ; Tobias Schmid-Schirling, Auteur ; Thomas Koerber, Auteur . - 2022 . - p 44-47.Langues : Anglais (eng)in INTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 15, N° 2 (2022) . - p 44-47

Catégories :	Analyse des défaillances (fiabilité)Lecteurs optiquesMicrostructuresProduction -- ContrôleSurfaces (technologie)Traçabilité
Index. décimale :	658.56 Contrôle de la production. Contrôle de la qualité, emballage
Résumé :	In order to improve production processes, it is important to identify the potential root cause of failures and to trace those. Production data that can be assigned to individual components are the key to this. Together with a research institute, an automotive supplier has equipped a pilot production line for diesel injectors with marker-free tracking technology.
Note de contenu :	- Surface microstructure as fingerprints - Tracking of smell components only possible without marking - Robustness, data processing and speed - 99.95 % of the components reliably identified - Fig. 1 : Component identification on the basis of the surface structure : The components are registered at the matching machine with the help of the track & trace fingerprint reading system - Fig. 2 : Optics and illumination of the track & trace fingerprint reading system are adapted to the application. The system uses standard components of industrial image processing - Fig. 3 : CRI2 Solenoid Valve Injector with a round armature component in the middle. Track & Trace Fingerprint takes six fingerprints of the pose surface for identification - Fig. 4 : Image of the same component for fingerprint registratin and identification in the assembly line. In the high-resolution camera image, the microstructure ant ehd multitude of matches of the reflective surface become visible. The blue and green markings indicate the result of image pre-processing for software positioning of the armature - Fig. 5 : Image of the same component for fingerprint registration and identification in the assembly line. In this image, some matching microstructures can be seen. The other image section in each case shows stronge differences. The component was nevertheless reliably identified
DOI :	https://doi.org/10.1007/s35724-022-0545-z
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A tunable controlled-release urea fertilizer coated with a biodegradable polyurethane-nanoclay composite layer [texte imprimé] / Kannika Sitthisuwannakul, Auteur ; Kanittha Kamonchaivanich, Auteur ; Thanakorn Wirunmongkol, Auteur ; Pennapa Muthitamongkol, Auteur ; Wiyong Kangwansupamonkon, Auteur . - 2023 . - p. 635-646.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 635-646

Catégories :	Angle de contactArgileBiodégradationCaractérisationCoefficient de diffusionUn coefficient de diffusion est une grandeur caractéristique du phénomène de diffusion de la matière. Le coefficient de diffusion mesure le rapport entre le flux molaire dû à la diffusion moléculaire, et le gradient de concentration de l'espèce chimique considérée (ou, plus généralement, de la variable d'effort entraînant cette diffusion), comme formulé par la loi de Fick. Engrais organiquesNanoparticulesPolyuréthanesRevêtements -- Propriétés chimiquesRevêtements -- Propriétés mécaniquesRevêtements -- Propriétés physiquesRevêtements organiquesSystème de libération contrôlée (technologie)Urée
Index. décimale :	667.9 Revêtements et enduits
Résumé :	To minimize a loss of urea to the environment and also control a release activity, a tunable and controlled-release urea fertilizer (TCRF) was created. Composite coating layers of the TCRF were synthesized using a composite of nanoclay (B27), and a linseed oil-modified polyurethane resin (BURNOCK® UL65). The concentration of B27 nanoclay was varied from 0, 3, 5 and 10 wt% and called TCRF, TCRF-3, TCRF-5 and TCRF-10, respectively. Firstly, nanocomposite free-standing films (NFs) with 0, 0.5, 1, 3, 5 and 10 wt% of B27 were synthesized and tested to demonstrate the mechanical properties of the coating layer. When the B27 clay content increased, the YoungÂ’s modulus and yield strength were increased. On the other hand, the elongation at break was decreased. NFs were also characterized by XRD and TEM, which showed a partial exfoliated nanocomposite character. The water contact angle measurement showed that all NFs had hydrophobicity properties (87°–90° contact angle). Moreover, the microorganism degradability test showed that the NFs degraded at 37 ± 2°C and 58 ± 2°C in manure, a common agriculture media. The study on coated urea fertilizers found that the thickness of all TCRFs layers is around 52–54 μm. The nitrogen release profiles of the TCRF at 60°C in water as a predictive analytic model were investigated using an elemental analyzer that is a pathway analysis method to understand the release profiles of the TCRFs. All release profiles fitted well with the sigmoidal model, which was suitable for a common plant growth. The profiles gave diffusion coefficients (D) in the range of 49–69 μm2 h−1 and presented an inverse trend to the yield strength of the NFs. The investigation demonstrated that B27 played an important role in tuning the strength of the coating layers that affected the urea release to the plants and the environment.
Note de contenu :	- MATERIALS AND METHODS : Chemicals - Nanocomposite free-standing films (NFS) preparation - Biodegradability analysis of the NF - Tunable controlled-release urea fertilizer (TCRF) preparation - Characterizations - Nitrogen release test and kinetic study of TCRF - RESULTS AND DISCUSSION : Swelling performance and the characteristics of the nanoclays - Chemical and physical properties of the NF - Biodegradable ability - Nitrogen release mechanism - Table 1 : Mechanical properties and contact angles of NF nanocomposite films - Table 2 : The percentages of biodegradation via the conversion yield of carbon in the sample to carbon dioxide according to the ASTM 5338–98 test method - Table 3 : Kinetic parameters and diffusion coefficients of various types of TCRF
DOI :	https://doi.org/10.1007/s11998-022-00688-w
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00688-w.pdf?pdf=button
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Vanillin as low-temperature isocyanate-blocking agent and its use in one-component aqueous coatings [texte imprimé] / Philipp Knospe, Auteur ; René Reichmann, Auteur ; Jochen S. Gutmann, Auteur ; Michael Dornbusch, Auteur . - 2023 . - p. 501-520.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 501-520

Catégories :	Agents de blocagesAnalyse thermomécanique dynamiqueDéblocageDispersions et suspensionsDurée de vie (Ingénierie)Formulation (Génie chimique)Liants en phase aqueusePolyisocyanatesRevêtements en phase aqueuseTrimèresEn chimie, un trimère est un objet moléculaire ou une structure composée de l'association de 3 éléments de base semblables entre eux. C'est un composé chimique issu de la réaction entre trois molécules identiques (appelées monomères). La réaction chimique qui produit des trimères est appelée trimérisation.Vanilline
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Mainly because of the high sensitivity of the isocyanate group to atmospheric moisture, it is blocked with a blocking agent for many applications and thus kept as inert as possible at room temperature (Zhang et al. in Langmuir ACS J Surf Colloids 37:12705, 2021, Meier-Westhues in Polyurethane: Lacke, Kleb-und Dichtstoffe, Vincentz Network, Hannover, p 36, 2007). When exposed to temperature, the protective group unblocks, and the isocyanate group reacts with the reactant that was previously present together with the blocked isocyanate (Meier-Westhues in Polyurethane: Lacke, Kleb- und Dichtstoffe, Vincentz Network, Hannover, p 36, 2007, Goldschmidt and Streitberger in BASF handbook on basics of coating technology, Vincentz Network, Hannover, pp 96–99, 2007). Many of the substances which are used today as blocking agents have toxicological concerns or unblock at high temperatures, which limits their application areas (Guillem Parra et al. in Blocked isocyanate polyurethane compositions using a new blocking agent, method of manufacture and uses thereof: European patent application, 2019, https://data.epo.org/publication-server/document?iDocId=6506253&iFormat=0). In this work, vanillin is presented as an effective deblocking agent at low temperatures and is compared with similar structures. The process of deblocking from an hexamethylene diisocyanate trimer (HDI-trimer) is followed by means of IR-spectroscopic measurements at different temperatures and thermogravimetric analysis. Temperature-dependent oscillation measurements using a rheometer are suitable for measuring onset temperatures and for qualitatively tracking the unblocking process. The combination of the results is used to draw conclusions about the existing deblocking mechanism. The comparatively low deblocking temperature of vanillin enables the formulation of an HDI-trimer modified with sulfonate groups and blocked with vanillin, which is dispersed in the aqueous phase and then reacted with OH-functional binders. Deblocking and subsequent reaction with the binder are followed by means of IR spectroscopy, and the mechanical properties of the coating films are examined. Vanillin is therefore suitable as a toxicologically harmless blocking agent for isocyanates and enables the production of crosslinkers for one-component water-based coatings (Arya et al. Adv Tradit Med (ADTM) 21:1, 2021).
Note de contenu :	- Raw materials - Analytical methods - Synthesis of the compounds : 4-(Hydroxymethyl)benzaldehyde - Vanillin-Na-4-HBS-trimer - Application testing - Table 1 : Mean values of deblocking temperatures from selected blocking agents - Table 2 : Formulations for the reaction between vanillin-Na-4-HBS-trimer and different water-based binders - Table 3 : Coating properties of reaction of vanillin-Na-4-HBS-trimer with different water-based binders
DOI :	https://doi.org/10.1007/s11998-022-00696-w
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00696-w.pdf?pdf=button% [...]
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Water-based system to prevent the yellowing of opaque coatings on knotted pine wood [texte imprimé] / Rodrigo Coniglio, Auteur ; Wolfgang Gaschler, Auteur ; Leonardo Clavijo, Auteur . - 2023 . - p. 781-788.Bibliogr.Langues : Américain (ame)in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 781-788

Catégories :	Bois -- Revêtements protecteursDécolorationEssais accélérés (technologie)LiantsMesureOpacité (optique)Primaire (revêtement)Résistance au jaunissementRevêtements -- Finition
Index. décimale :	667.9 Revêtements et enduits
Résumé :	Water-based opaque coatings used on pine wood show undesired discolorations related to the presence of knots which have an outstanding high concentration of extractives. These compounds, of both polar and nonpolar nature, migrate through the polymeric structure resulting in a yellow–brown spot over the knot. A water-based coating system comprising a polar primer and a nonpolar topcoat proved to have remarkable performance preventing the migration of the extractives and the discoloration of the painted surface. The knot bleeding resistance was tested following EN 927–7. The color of the coating over the knot was measured using CIELab coordinates, and the resulting color difference in comparison with the surrounding paint was in all cases less than the accepted limit for discoloration of opaque coatings. The need to have the combined system to successfully block the whole spectrum of extractives was proved by the evaluation of the individual coatings as well as the utilization of polar dispersions as topcoats. The system presented in this work constitutes a solution to the discoloration of water-based coatings over knotted pine wood.
Note de contenu :	- MATERIALS AND METHODS : Wood material - Coatings - Coating procedure - Artificial weathering procedure - Discoloration measurement - RESULTS AND DISCUSSION : Performance of a nonpolar binder - Performance of a polar binder - Performance of a system of a polar primer and nonpolar topcoat - Performance of a system of a polar primer and polar topcoats - Table 1 : Hansch parameter for the binders used in this work - Table 2 : Exposure parameters according to EN ISO 4892–2:2006 - Table 3 : Discoloration results of the staining test on 20 boards painted with the binder A - Table 4 : Maximum discoloration measured for boards painted with the binder B as pigmented coating - Table 5 : Discoloration results of the staining test on 20 boards painted with the binder A as primer and the binder B as topcoat - Table 6 : Detail of the systems used to test the performance of a polar primer and polar topcoat - Table 7 : Maximum discoloration measured for boards painted with the systems with polar primer and polar topcoats
DOI :	https://doi.org/10.1007/s11998-022-00723-w
En ligne :	https://link.springer.com/content/pdf/10.1007/s11998-022-00723-w.pdf?pdf=button% [...]
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With polysiloxane-epoxy copolymers towards flexible electronics [texte imprimé] / Jaclyn Balthasar, Auteur ; Torsten Lubenow, Auteur ; Andreas Funck, Auteur ; Stephan Sprenger, Auteur . - 2022 . - p. 18-21.Bibliogr.Langues : Multilingue (mul)in ADHESION - ADHESIVES + SEALANTS > Vol. 19, N° 4/2022 (2022) . - p. 18-21

Catégories :	Adhésifs dans les équipements électriques/électroniquesAminesUne amine est un composé organique dérivé de l'ammoniac dont certains hydrogènes ont été remplacés par un groupement carboné. Si l'un des carbones liés à l'atome d'azote fait partie d'un groupement carbonyle, la molécule appartient à la famille des amides. Découvertes en 1849, par Wurtz les amines furent initialement appelées alcaloïdes artificiels. On parle d'amine primaire, secondaire ou tertiaire selon que l'on a un, deux ou trois hydrogènes substitués. Par exemple, la triméthylamine est une amine tertiaire, de formule N(CH3)3. Typiquement, les amines sont obtenues par alkylation d'amines de rang inférieur. En alkylant l'ammoniac, on obtient des amines primaires, qui peuvent être alkylées en amines secondaires puis amines tertiaires. L'alkylation de ces dernières permet d'obtenir des sels d'ammonium quaternaire. D'autre méthodes existent : 1. Les amines primaires peuvent être obtenues par réduction d'un groupement azoture, 2. Les amines peuvent aussi être obtenues par la réduction d'un amide, à l'aide d'un hydrure, 3. L'amination réductrice permet l'obtention d'amines substituées à partir de composés carbonylés (aldéhydes ou cétones), 4. Les amines primaires peuvent être obtenues par la réaction de Gabriel.Copolymère silicone époxyRéticulants
Index. décimale :	668.3 Adhésifs et produits semblables
Résumé :	Epoxy resins are traditionally used in electronic applications as adhesives, potting systems and substrate materials. New possibilities are opened up by the inclusion of polysiloxane-epoxy copolymers in the epoxy resin formulations. With them, the resin systems can be controlled almost infinitely from hard to highly flexible materials.
Note de contenu :	- Addition level polysiloxane epoxy copolymer in the epoxy resin - Excellent adhesion to various substrates - Materials and tests - Extremely high reliability - Fig. 1 : Flexible printed dicruit board (FCCL) with damage - Fig. 2 : Control of material properties via the proportion of copolymer in the epoxy resin - Fig. 3 : Schematic structure of polysiloxane-epoxy block copolymers - Fig. 4 : Erichsen cross-cut test of an amine-cured silicone-epoxy copolymer on copper-cladded FR4 base material - Table 1 : Change in mechanical properties of an amine-cured pure polysiloxane-epoxy copolymer in the 85/85 test
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