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JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH . Vol. 18, N° 6Mention de date : 11/2021Paru le : 15/12/2021 |
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Ajouter le résultat dans votre panierPolyimide–polyester hybrid UV-curable powder coating / Hamideh M. Shokouhi Mehr in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : Polyimide–polyester hybrid UV-curable powder coating Type de document : texte imprimé Auteurs : Hamideh M. Shokouhi Mehr, Auteur ; Theodore J. Hammer, Auteur ; Mark D. Soucek, Auteur Année de publication : 2021 Article en page(s) : p. 1445-1459 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse thermique
Caractérisation
Formulation (Génie chimique)
Matériaux hybrides
Polyesters
Polyimides
Polymères -- Synthèse
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiques
Revêtements poudre
RhéologieRésumé : A new UV-curable maleimide-terminated polyimide was prepared and characterized using gel-permeation chromatography, infrared, and nuclear magnetic resonance spectroscopy. The polyimide was formulated with a commercially available UV-curable polyester resin via twin-screw extrusion to prepare a hybrid powder coating system. The hybrid powder coatings were cured by exposing the molten formulation to UV light. The films were studied by dynamic mechanical analysis (DMA), thermomechanical analysis, and differential scanning calorimetry. DMA highlighted the viscoelastic behavior of the films and showed that an increase in Tg was obtained with increasing polyimide content, as determined via the α-transition in the tanδ curve. Thermogravimetric analysis showed an improvement in the thermal stability of the polyester with the addition of the polyimide. Deformation resistance of the UV-cured films was investigated by SAOS and LAOS rheological methods to investigate the relative endurance of these coatings when subjected to different strains. The viscoelastic properties of the hybrid system were most improved when 16% weight percent of polyimide was added into the system. Note de contenu : - EXPERIMENTAL : Material - Synthesis of maleimide-terminated polyimide (PI) - Instrumentation and characterization - Processing parameters and formulations - Powder aplication and curing - Wide-angle X-ray scattering - Atomic Force Microscopy (AFM)
- RESULTS AND DISCUSSION : POlymer synthesis and characterization - Thermal analysis
- Table 1 : FTIR absorption assignment of UVECOAT, PI, and PI–PE-1 post-UV-cure
- Table 2 : Summary of the UV-curable formulations (by weight %) that were used in this study
- Table 3 to 5 : Summary of thermal properties of UV-curable formulations
- Table 6 : Summary of the viscoelastic properties of the UV-curable formulations
- Table 7 : Summary of the molecular weight and polydispersity data of the UV-cured samples
- Table 8 : Represents the summary of coating properties of PI-PEs with different ratios of polyimideDOI : https://doi.org/10.1007/s11998-021-00470-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00470-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36801
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible UV-curable polyurethane inorganic-organic hybrid coatings / Tong Xu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : UV-curable polyurethane inorganic-organic hybrid coatings Type de document : texte imprimé Auteurs : Tong Xu, Auteur ; Irina J. Zvonkina, Auteur ; Mark D. Soucek, Auteur Année de publication : 2021 Article en page(s) : p. 1461-1479 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aminopropyltriethoxysilane
Composés organiques -- Synthèse
Diisocyanate d'isophorone
Diluants
Formulation (Génie chimique)
Matériaux hybrides
Matériaux hybrides -- Propriétés mécaniques
Oligomères
Polyméthacrylate d'hydroxyéthyle
Polyuréthanes
Revêtements -- Propriétés mécaniques
Sol-gel, Procédé
TétraéthoxysilaneIndex. décimale : 667.9 Revêtements et enduits Résumé : A UV-curable inorganic/organic hybrid coating was prepared from a methacrylated urethane oligomer, a reactive diluent, tetraethyl orthosilicate (TEOS) oligomers, and a free radical photoinitiator. The reactive diluent was synthesized using IPDI, HEMA, and aminopropyltetraethoxysilane (APTES), resulting in both inorganic and organic reactive groups. The photocuring kinetics was investigated using photo-DSC and real-time FTIR spectroscopy. The effect of the reactive diluent and TEOS oligomers concentration was investigated using impact resistance, pencil hardness, and adhesion. Two glass transition temperatures were observed, indicating a substantial interfacial phase generated between the inorganic and organic domains. The reactive diluent-to-reactive oligomer ratio had a larger effect on the mechanical behavior of the system than the TEOS concentration did. Adhesion improves with increasing TEOS oligomer concentration or reactive diluent concentration until maxima, after which increasing concentration has an adverse effect on adhesion. Note de contenu : - MATERIALS : Synthesis of the reactive diluents - Synthesis of the acrylated urethane oligomers - Synthesis of TEOS oligomers - Coating formulation and application - Characterization of the film properties
- RESULTS AND DISCUSSION : The photocuring kinetics - Viscoelastic properties of the hybrid films - Tensile and general coatings properties
- Table 1 : Formulation of hybrid coatings with different contents of the reactive diluent
- Table 2 : Formulations of hybrid coatings with different contents of the TEOS oligomers
- Table 3 : Viscoelastic properties of the hybrid films as a function of the reactive diluent contents with 2.5 wt% of the TEOS oligomers
- Table 4 : Viscoelastic properties of hybrid films as a function of TEOS oligomers with the ratio of reactive diluents to acrylated urethane prepolymers: 25/75
- Table 5 : General coating properties of hybrid films as a function of reactive diluents with 2.5 wt% TEOS oligomers
- Table 6 : General coating properties of the hybrid films as a function of the TEOS oligomers, with the ratio of reactive diluents to urethane oligomers of 2.0 mol/molDOI : https://doi.org/10.1007/s11998-021-00473-1 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00473-1.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36802
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible Nanolatex technology 1 : synthesis and characterization of nanosize acrylic latexes and comparison to their conventional size counterparts / Ravi G. Joshi in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : Nanolatex technology 1 : synthesis and characterization of nanosize acrylic latexes and comparison to their conventional size counterparts Type de document : texte imprimé Auteurs : Ravi G. Joshi, Auteur ; Frank N. Jones, Auteur ; Theodore Provder, Auteur ; Weidian Shen, Auteur Année de publication : 2021 Article en page(s) : p. 1481-1500 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Coalescence (Sciences physiques)
Formation de film
Latex
Microémulsions
Morphologie (matériaux)
Nanoparticules
Polyacryliques
Polymères -- Synthèse
Polymérisation en émulsion
Réticulation (polymérisation)
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : For this study, functional precoalescence (internally crosslinked) and postcoalescence (crosslinkable) conventional latexes were made using seeded semi-continuous emulsion polymerization. Nanosize polymer latexes with or without crosslinkable functional groups were made using a modified microemulsion copolymerization process. Films cast from conventional and nanosize latex were characterized using specific end use tests and fundamental properties using dynamic mechanical analysis, modulated differential scanning calorimetry, and atomic force microscopy. This study compares conventional and nanosize latex with respect to the effect of the type and level of crosslinking, particle size and distribution on latex film formation and morphology, and end use and fundamental properties. Nanosize latex films in general have superior gloss, solvent resistance, and adhesion but inferior water resistance. Stress–strain Young’s modulus showed an increase as a function of increasing crosslinker level in the nanosize latex films. Note de contenu : - EXPERIMENTAL : Preparation of nanoparticle latexes using improved modified microemulsion copolymerization - Materials - Preparation of conventional size precoalescence or postcoalescence crosslinked conventional latexes
- CHARACTERIZATION OF LATEXES : Latex properties - Film properties of conventional latexes and nanoparticle latexes - Thermal and mechanical properties of conventional latexes and nanoparticle latexes - Measurements with AFM of conventional latexes and nanoparticle latexes
- RESULTS AND DISCUSSIONS : Nanosize latex synthesis and characterization - Film formation by “precoalescence” and “postcoalescence” crosslinked latexes - Gel content results - End-use film properties - Fundamental mechanical properties - Stress–strain analysis of constituent nanosize latexes with precoalescence and postcoalescence crosslinking and comparisons with their conventional size counterparts - Dynamic mechanical properties
- Table 1 : Composition table for nanosize latexes (with or without functional group)
- Table 2 : Characteristics of conventional (with or without crosslinker) latexes
- Table 3 : Characteristics of nanosize (with or without crosslinker) latexes
- Table 4 : End-use properties of films cast from conventional latexes
- Table 5 : End-use properties of films cast from nanosize latexes AFM results
- Table 6 : Comparison of surface smoothness and gloss values of nanoparticle latexes and their conventional counter parts
- Table 7 : Results of stress–strain analysis of nanosize latexes
- Table 8 : Results of stress–strain analysis of conventional size latexes
- Table 9 : Comparison of DMA values with MDSC Tg values of conventionally size precoalescence or postcoalescence crosslinked latexes
- Table 10 : Comparison of DMA values with MDSC Tg values of nanosize precoalescence or postcoalescence crosslinked latexesDOI : https://doi.org/10.1007/s11998-021-00475-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00475-z.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36803
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible Consistent determination of the contrast ratio of white inks / Danny C. Rich in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : Consistent determination of the contrast ratio of white inks Type de document : texte imprimé Auteurs : Danny C. Rich, Auteur Année de publication : 2021 Article en page(s) : p. 1501-1509 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Blanc (couleur)
Encre
Mesures optiques
Opacité (optique)
Réflectance
Translucidité (optique)Index. décimale : 667.9 Revêtements et enduits Résumé : Translucency is a critical property of print on flexible packaging. It forms the basis for obtaining full color gamut, hiding the contents of a package and even creating the scanner readable digital codes for point of purchase tracking. The print industry has followed the paint and decorative coatings industry, the paper industry and the plastics industry in attempting to identify measurement methods that will accurately describe translucency or its opposite, opacity. Both of these properties are defined in terms of the contrast ratio, the ratio of the luminous reflectance of a coating placed over a black and a white substrate. In this paper, the theory of diffuse reflectance spectroscopy is used to define the measurements used to determine the contrast ratio. A brief experimental study illustrates the strong points and weak points of traditional contrast ratio measurements. A better model of contrast ratio determination is hypothesized, and an experiment is designed and reported that demonstrates both the validity of the hypothesis and a method for obtaining consistent estimates of the contrast ratio. Note de contenu : - Table 1 : Luminous reflectance (Y) and contrast ratios of the same white ink printed on different substrates and backed with different white and black backings
- Table 2 : Contrast ratio readings from three instrumentsDOI : https://doi.org/10.1007/s11998-021-00515-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00515-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36804
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible Assessment of sparkle and graininess in effect coatings using a high-resolution gonioreflectometer and psychophysical studies / Jiri Filip in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : Assessment of sparkle and graininess in effect coatings using a high-resolution gonioreflectometer and psychophysical studies Type de document : texte imprimé Auteurs : Jiri Filip, Auteur ; Radomir Vavra, Auteur ; Martina Kolafova, Auteur ; Frank J. Maile, Auteur Année de publication : 2021 Article en page(s) : p. 1511-1530 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Evaluation visuelle
Goniométrie
Granulation
Pigments à effets spéciaux
PsychophysiqueLa psychophysique est une branche de la psychologie expérimentale qui cherche à déterminer les relations quantitatives qui existent entre un stimulus physique et la perception qu'on en a. La psychophysique s'intéresse aux sens physiologiques tels que la vue, l'ouïe, le toucher (plus rarement l'odorat ou le goût) mais aussi à des sensations comme la perception du temps ou du mouvement.
Revêtements -- Texture
Surfaces -- Perception visuelleIndex. décimale : 667.9 Revêtements et enduits Résumé : The aim of this article is to propose a model to automatically predict visual judgement of sparkle and graininess of special effect pigments used in industrial coatings. Many applications in the paint and coatings, printing and plastics industry rely on multi-angle color measurements with the aim of properly characterizing the appearance, i.e., the color and texture of the manufactured surfaces. However, when it comes to surfaces containing effect pigments, these methods are in many cases insufficient and it is particularly texture characterization methods that are needed. There are two attributes related to texture that are commonly used: (1) diffuse coarseness or graininess and (2) sparkle or glint impression. In this paper, we analyzed visual perception of both texture attributes using two different psychophysical studies of 38 samples painted with effect coatings including different effect pigments and 31 test persons. Our previous work has shown a good agreement between a study using physical samples with one that uses high-resolution photographs of these sample surfaces. We have also compared the perceived (1) graininess and (2) sparkle with the performance of two commercial instruments that are capable of capturing both attributes. Results have shown a good correlation between the instruments’ readings and the psychophysical studies. Finally, we implemented computational models predicting these texture attributes that have a high correlation with the instrument readings as well as the psychophysical data. By linear scaling of the predicted data using instruments readings, one can use the proposed model for the prediction of graininess and both static and dynamic sparkle values. Note de contenu : - RELATED WORK : Visual assessment of effect coatings textures - Modeling and visualization of texture effects of effect coatings - Industrial characterization of texture
- TESTED COATINGS
- METHODOLOGY : experiment 1 - Real samples - Experiment 2 - Photographs of samples
- EXPERIMENTS : Psychophysical evaluation of real samples - Psychophysical evaluation of photographs - Discussion of limitations
- COMPARISON TO INDUSTRIAL DEVICES
- PREDICTION OF SPARKLE AND GRAININESS : Sparkle model - Graininess model
- IMPLICATION TO DYNAMIC SPARKLE MODEL
- Table 1 : Correlations of graininess and sparkle values between experiments using real samples and their photographs for viewing polar angle θv=45∘
- Table 2 : A list of the tested effect coating samples and their composition
- Table 3 : CIE Lab values of the tested coatings and results of their sparkle (S) and graininess (G) psychophysical assessment using real samples and their photographs/videoDOI : https://doi.org/10.1007/s11998-021-00518-5 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00518-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36805
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible Liquid film stability and contact line dynamics of emulsion liquid films in curtain coating process / A. Mohammad Karim in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : Liquid film stability and contact line dynamics of emulsion liquid films in curtain coating process Type de document : texte imprimé Auteurs : A. Mohammad Karim, Auteur ; Wieslaw J. Suszynski, Auteur ; Saswati Pujari, Auteur Année de publication : 2021 Article en page(s) : p. 1531-1541 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Liquides polyphasiques
Revêtement au rideauLe revêtement au rideau, également connu sous le nom de revêtement conforme ou de contour, est un processus industriel dans lequel un rideau de fluide lisse tombe comme une cascade sur la surface à revêtir. L’objet à revêtir est transporté sur une bande transporteuse et se déplace à une vitesse prédéterminée et contrôlée. Il traverse le rideau tombant de fluide où il acquiert un revêtement uniforme, dont l’épaisseur est déterminée par la quantité et la viscosité du fluide qui quitte le réservoir et la vitesse de la bande transporteuse. Tout excès de liquide est collecté dans une auge et est renvoyé dans le réservoir de coulée. Le liquide tombe dans un tamis mince sur l’objet à travers une fente réglable étroite dans la base du réservoir de coulée, et la surface supérieure de l’objet qui passe à travers le tamis est recouverte uniformément de fluide.
Revêtements en phase aqueuse:Peinture en phase aqueuseTags : 'Stabilité du film liquide' 'Amincissement par cisaillement' 'Liquide multiphase' 'Ligne de contact Index. décimale : 667.9 Revêtements et enduits Résumé : Previous studies reported that single-phase liquid curtains become more stable with increasing Ohnesorge number. Many liquid films used in the coating industry are types of emulsion samples. Despite this fact, the effect of multiphase liquids on the dynamics of the curtain breakup has not yet been considered. This study explores the stability of emulsion curtain coating via high-speed visualization. The critical condition at the onset of curtain breakup was determined by finding the flow rate below which the curtain broke. Curtain breakup was observed via a hole initiation within the curtain. The results reveal that curtain breakup dynamics is governed by the characteristic dynamic viscosity and the surface tension. The emulsion curtain stability, defined by Weber number, increases as Ohnesorge number rises, similar to the single-phase liquid (i.e., Newtonian and pure shear thinning) curtain stability. The critical web speed at which the contact line moves upstream of the curtain, a phenomenon called heel formation, and that at which air entrainment occurs, were determined for emulsion solutions at different flow rates. The results reveal that the surface tension increase delays the onset of air entrainment which could help to conduct faster curtain coating substrates with emulsion liquid films. Note de contenu : - MATERIALS AND METHODS : Experimental setup - Materials
- RESULTS AND DISCUSSION : Liquid velocity in the curtain - Visualization of the liquid curtain breakup - Growth dynamics of hole within the emulsion liquid film - Liquid curtain stability - Stability of the dynamic contact line
- Table : The physical properties of emulsion solutionsDOI : https://doi.org/10.1007/s11998-021-00520-x En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00520-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36806
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible Effect of humidity on curing of alkoxysilane-functionalized alkyd coatings / Brittany Pellegrene in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : Effect of humidity on curing of alkoxysilane-functionalized alkyd coatings Type de document : texte imprimé Auteurs : Brittany Pellegrene, Auteur ; Mark D. Soucek, Auteur Année de publication : 2021 Article en page(s) : p. 1543-1555 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Formation de film
Formulation (Génie chimique)
Humidité
Polyalkoxysiloxane
Polyalkydes
Polymères -- Synthèse
Revêtements -- Effets de l'humidité
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés thermiques
Rhéologie
Traction (mécanique)
Transition vitreuse
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : The effect of relative humidity on the curing of alkoxysilane functional alkyds and reactive diluents was evaluated. Alkoxysilane functional alkyds and tung oil-based reactive diluents were synthesized and used as additives in varying amounts in alkyd coatings. Looking at modified alkyd versus modified reactive diluent allows for the comparison of the humidity effect on high and low molecular weight alkoxysilane functional additives. The coatings were cured at 25 and 75% relative humidity and evaluated for drying time, coating and tensile properties, and gel content. It was found that at higher humidity, the alkoxysilane-containing samples improved properties significantly when compared to the control alkyd. Note de contenu : EXPERIMENTAL : Materials - Instrumentation - Alkyd resin synthesis (LLOA) - Alkoxysilane-modified alkyd resin synthesis (ASLOA) - Alkoxysilane-modified tung oil (ASTO) synthesis - Viscosity measurements - Formulations and film preparation - Coating properties - Tensile testing
- RESULTS : Synthesis and characterization - Film formation - Coatings properties - Tensile properties - Thermal properties - Gel content
- Table 1 : Formulations with ASLOA
- Table 2 : Formulations with ASTO
- Table 3 : Drying times of samples cured in different relative humidity conditions
- Table 4 : Coating properties of samples cured at 25 %RH
- Table 5 : Coating properties of samples cured at 75 %RH
- Table 6 : Glass transition temperature of the samples cured at varying relative humidityDOI : https://doi.org/10.1007/s11998-021-00494-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00494-w.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36807
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible The influence of methacrylic acid and urethane methacrylate on the film properties of hybrid urethane–acrylic latexes in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : The influence of methacrylic acid and urethane methacrylate on the film properties of hybrid urethane–acrylic latexes Type de document : texte imprimé Année de publication : 2021 Article en page(s) : p. 1557-1577 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Composés organiques -- Synthèse
Copolymère uréthane acrylique
Extrait sec
Formation de film
Formulation (Génie chimique)
Granulométrie
Méthacrylate d'uréthane
Méthacrylique, AcideL'histoire de l'acide méthacrylique commence en 1865, année où il est synthétisé pour la première fois à partir du méthacrylate d'éthyle.
L'acide méthacrylique est très réactif avec les groupes carboxyles, vinyles et esters.
Poids moléculaires
Revêtements -- Propriétés mécaniques
Revêtements -- Propriétés thermiques
Revêtements organiques
Transition vitreuse
ViscoélasticitéIndex. décimale : 667.9 Revêtements et enduits Résumé : A non-isocyanate pathway was used to synthesize a urethane methacrylate monomer, 2-((methylcarbamoyl)oxy)ethyl methacrylate (MEM) and methacrylic acid (MAA). The MEM and MAA mixture was copolymerized with MMA and BA in a semicontinuous monomer-starved process to prepare latexes via emulsion polymerization. Varying amounts of MEM and MAA monomers were introduced to the latex, and their effect on the thermal properties, film formation, viscoelastic, mechanical and morphological properties was examined. The upper limit functionality concentration was evaluated based on the latex stability. Incorporation of MEM and MAA in latexes enhanced film formation properties displayed by lowering MFFT. MEM and MAA functionalized latexes exhibited enhanced Young’s modulus, tensile strength and hardness compared to the control latex without any MEM and MAA. Note de contenu : - EXPERIMENTAL : Materials - Instrumentation - Synthesis of monomers and latexes - Synthesis of latexes - Latex characterization
- RESULTS : Characterization of MEM+MAA - Latex conversion, particle size and molecular weight - Thermal properties and film formation - Viscoelastic properties - Mechanical properties - Morphological properties—TEM - Morphological properties—AFM - Coatings properties
- Table 1 Latex formulations for 0, 2, 5 and 10 mol% MEM+MAA
- Table 2 Solids content, overall conversion, particle size and Mw− results of MEM+MAA latexes
- Table 3 Glass transition temperature, minimum film formation temperature, and their difference for MEM+MAA latexes
- Table 4 Viscoelastic properties of MEM+MAA latexes as a function of increasing functionality of MEM+MAA
- Table 5 Roughness data for 0, 2, 5 and 10 mol% MEM+MAA latex
- Table 6 Coatings tests results for MEM+MAA latexes as a function of increased functionality from 0 to 10 mol%DOI : https://doi.org/10.1007/s11998-021-00497-7 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00497-7.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36808
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible Polymerizable allyl anionic and nonionic emulsifier: synthesis and properties of its emulsion for architectural coating / Ye Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : Polymerizable allyl anionic and nonionic emulsifier: synthesis and properties of its emulsion for architectural coating Type de document : texte imprimé Auteurs : Ye Wang, Auteur ; Yi-en Yuan, Auteur ; Xu-min Zheng, Auteur ; Hao-jia Su, Auteur ; Yong-xin Ji, Auteur Année de publication : 2021 Article en page(s) : p. 1579-1590 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Colorimétrie
Emulsifiants
Mouillabilité
Polyacryliques
Polymérisation en émulsion
Revêtements en bâtiment:Peinture en bâtiment
Revêtements en phase aqueuse -- Additifs
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : In this manuscript, the polymerizable emulsifiers AEC13-P10 and AEASC13-P10 were synthesized and successfully used to prepare acrylic emulsion for architectural coating through emulsion polymerization. The critical micelle concentration, emulsifying performance, emulsifying power, wettability, and other properties of emulsifiers with different polyether chain lengths, alkyl chain lengths, and emulsions were carefully investigated. The result discloses that AESAC13-P10 features superior performance among these emulsifiers. The color performance and water resistance of the paint prepared with AEASC13-P10 were obviously better than nonreactive emulsifier E-1310SA. Note de contenu : - EXPERIMENTAL SECTION : Materials - Synthesis of polymerizable emulsifiers - Synthesis of emulsions for architectural coating - Characterization of emulsion
- RESULTS AND DISCUSSION : Characterization of the performance of emulsifiers bearing different carbon chain lengths - Characterization of the performance of emulsifiers bearing different polyether chain lengths - Characterization of emulsion for architectural coating with AESAC13-P10
- Table 1 : Photographs of plates coated by color paste containing paints prepared with AESAC13-P10 and E-1310SA
- Table 2 : The color difference of plates coated with paints prepared with AESAC13-P10 and E-1310SADOI : https://doi.org/10.1007/s11998-021-00509-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00509-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36809
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible Synthesis of UV-curable polyesters with lateral double bonds by ring-opening polymerization and their properties / Yumei Zhou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : Synthesis of UV-curable polyesters with lateral double bonds by ring-opening polymerization and their properties Type de document : texte imprimé Auteurs : Yumei Zhou, Auteur ; Shujie Ming, Auteur ; Liuyan Tang, Auteur ; Jinqing Qu, Auteur Année de publication : 2021 Article en page(s) : p. 1591-1601 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anhydrides
Caractérisation
Catalyseurs
Copolymère vinyle ester
Copolymérisation
Epoxydes
Monomères
Oligomères
Photoréticulation
Polyesters
Revêtements -- Séchage sous rayonnement ultraviolet
Revêtements organiques
Stabilité thermique
ViscositéIndex. décimale : 667.9 Revêtements et enduits Résumé : UV-curable coatings have been receiving more and more attention for their high performance and environmentally friendly advantages, which meet the “5 E” requirements of coating development. Vinyl oligomer is the main factor affecting the performance of UV-curable coating, but it is difficult to meet the requirements of high-end UV curing technology due to its high viscosity, low vinyl functionality, and high cost. Herein, polyesters with lateral double bonds were prepared by ring-opening polymerization of acid anhydride and glycidyl methacrylate. The epoxy compound without vinyl groups was used to participate in the polymerization reaction to adjust the viscosity and vinyl functionality of the resin. Furthermore, the molecular structure and molecular weight of the polyesters were characterized by FTIR, 1H NMR, and GPC. The effects of the categories and proportions of acid anhydride and glycidyl ether on the viscosity and hardness of the coating films were studied. The results indicated that the use of acid anhydrides containing phenyl rigid groups could significantly increase the hardness of the paint film, and the long-chain tertiary glycidyl carbonate (E10P) had the best viscosity reduction effect. When the molar ratio of acid anhydride, GMA and E10P was 4:1:3, the viscosity of the prepared vinyl polyester was low to 2755 mPa·s. In this case, the hardness of the paint film was as high as H, and it also exhibited excellent water resistance and alcohol resistance. Note de contenu : - EXPERIMENTAL : Materials - Preparation of UV-curable polyesters with lateral double bonds - Characterization
- RESULTS AND DISCUSSION : Influencing factors of polyester performances - Structural characterization of the polyesters - Analysis of photocuring behavior of the polyesters - Thermal stability of the polyesters - Film properties of the polyesters
- Table 1 : Effect of glycidyl methacrylate content on the properties of the polyesters
- Table 2 : Effect of anhydride type on the properties of the polyesters
- Table 3 : Effect of different epoxy monomers on the properties of the polyesters
- Table 4 : Copolymerization of PA and epoxides
- Table 5 : Selection of different ring-opening catalysts
- Table 6 : GPC results of the polyesters
- Table 7 : The film properties of the polyesterDOI : https://doi.org/10.1007/s11998-021-00513-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00513-w.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36818
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible Simplification of interior latex paint using biopolymer to replace rheological additives and calcium carbonate extender / Lei Jong in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : Simplification of interior latex paint using biopolymer to replace rheological additives and calcium carbonate extender Type de document : texte imprimé Auteurs : Lei Jong, Auteur Année de publication : 2021 Article en page(s) : p. 1603-1612 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biopolymères
Blanc (couleur)
Caractérisation
Dureté (matériaux)
Epaississants
Formulation (Génie chimique)
Granulométrie
Latex
Opacifiants
Opacité (optique)
Produits chimiques -- Suppression ou remplacement
Protéines végétales
Revêtements -- Additifs:Peinture -- Additifs
Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques
Soja et constituants
Transition vitreuseIndex. décimale : 667.9 Revêtements et enduits Résumé : An interior latex paint was simplified by using soy protein (SP) to replace hydroxyl ethyl cellulose (HEC) thickener, rheological modifier, and calcium carbonate. The rheological and solid-state properties of the latex paints were investigated. The SP paint had similar viscosity characteristics as that of the HEC paint for practical applications. Strain sweep experiments show that the SP paint has less antisettling characteristic compared to the HEC paint. The dispersion structure of the SP paint is less flexible than that of the HEC paint, but has similar strength at large strain. The values of storage moduli at very low frequency indicate both the HEC and SP paints have a long-term stability. The SP paint had a slower recovery rate after high shear compared to the HEC paint, indicating that the SP paint will have better leveling, but slightly more sagging during application. The dried SP paint had a greater storage modulus than the HEC paint under ambient temperature. The SP paint also had a higher glass transition temperature, indicating a greater ability of protein to immobilize polymer latex. The magnitude of G′ shows that the SP paint is more rigid than the HEC paint. The hardness test shows that the SP paint had a greater hardness than the HEC paint. Note de contenu : - METHODS : Materials - Preparation of latex paint - Particle size, opacity, and films thickness - Rheology - Characterizations of dried latex paints
- RESULTS AND DISCUSSION : Rheological behavior of the latex paints - Strain- and frequency-dependent modulus - Recovery behaviors - Dynamic mechanical properties of dried latex paints - Opacity of dry paint films
- Table 1 : A white latex paint formulation
- Table 2 : Storage modulus, glass transition temperature, and hardness of the latex paints
- Table 3 : Opacity, whiteness, and coverage of the latex paintsDOI : https://doi.org/10.1007/s11998-021-00514-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00514-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36819
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible New biodegradable film produced from cocoa shell nanofibrils containing bioactive compounds / Ozana Almeida Leissa in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : New biodegradable film produced from cocoa shell nanofibrils containing bioactive compounds Type de document : texte imprimé Auteurs : Ozana Almeida Leissa, Auteur ; Iasnaia Maria de Carvalho Tavares, Auteur ; Lucas Oliveira Souza, Auteur ; Lucas Galhardo Pimenta Tienne, Auteur ; Matheus Cordazzo Dias, Auteur ; Gustavo Henrique Denzin Tonoli, Auteur ; Eduardo Valério de Barros Vilas Boas, Auteur ; Selma Gomes Ferreira Leite, Auteur ; Melissa Limoeiro Estrada Gutarra, Auteur ; Muhammad Bilal, Auteur ; Marcelo Franco, Auteur Année de publication : 2021 Article en page(s) : p. 1613-1624 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Antioxydants
Biopolymères
Cacaoyer et constituants
Caractérisation
CelluloseLa cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules.
Couches minces
Couches minces -- Propriétés mécaniques
Couches minces -- Propriétés thermiques
Microfibres
Morphologie (matériaux)
Nanoparticules
Perméabilité
Solubilité
Statistique
Vapeur d'eauIndex. décimale : 667.9 Revêtements et enduits Résumé : Cellulosic nanofibrils from cocoa shells were used in this study to produce biodegradable films from a residue naturally rich in bioactive compounds, while reserving these compounds. The nanofibrils were obtained by mechanical defibrillation without chemical or enzymatic pretreatment. The nanofibril gel was evaluated in biodegradable films, for the first time, with the addition of glycerol as a plasticizer in the proportions of 0, 1, 3, 5, and 7% (w/w). The morphological characteristics, thermal analysis, mechanical properties (rupture tensile, maximum rupture elongation, and Young’s modulus), water vapor permeability, and water solubility of the films were investigated. In addition, the residue was analyzed and compared to the films by the FTIR technique to prove the maintenance of functional groups characteristic of antioxidant activity. The use of 3% and 5% glycerol as a plasticizer showed the best mechanical characteristics—reduced water vapor permeation and increased degradation in water. The pure nanofibril film demonstrated greater thermal stability. It was possible to identify the maintenance of aromatic groups and phenols in the residue from all cocoa shell nanofibril films. This study contributes to the future application of cocoa shell nanofibers in the production of edible films, coatings, and packaging materials. It recommends their application in cocoa and chocolate products due to the compatibility of smell and color. Note de contenu : - MATERIALS AND METHODS : Raw material - Preparation of cocoa shell nanofibrils - Production of cocoa shell nanofibril films (CSNF) - Film characterization - Statistical analysis
- RESULTS AND DISCUSSION : Characterization of cocoa shell nanofibrils - Appearance and morphology cocoa shell nanofibril films (CSNF) - Chemical composition of the cocoa shell (CS) and cocoa shell nanofibril films (CSNF) - Structure of the CSNF - Thermal performance of films - Mechanical properties - Water vapor permeability - Solubility in water
- Table 1 : Water vapor permeability and mechanical properties of nanofibrils filmsDOI : https://doi.org/10.1007/s11998-021-00519-4-w En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00519-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36820
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible Halloysite nanotubes-based nanocomposites for the hydrophobization of hydraulic mortar / Maria Rita Caruso in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : Halloysite nanotubes-based nanocomposites for the hydrophobization of hydraulic mortar Type de document : texte imprimé Auteurs : Maria Rita Caruso, Auteur ; Bartolomeo Megna, Auteur ; Lorenzo Lisuzzo, Auteur ; Giuseppe Cavallaro, Auteur ; Stefana Milioto, Auteur ; Giuseppe Lazzara, Auteur Année de publication : 2021 Article en page(s) : p. 1625-1634 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biopolymères
CelluloseLa cellulose est un glucide constitué d'une chaîne linéaire de molécules de D-Glucose (entre 200 et 14 000) et principal constituant des végétaux et en particulier de la paroi de leurs cellules.
Cires
Colorimétrie
Couches minces
HalloysiteL'halloysite-7Å est une espèce minérale du groupe des silicates sous-groupe des phyllosilicates de formule Al2Si2O5(OH)4 avec des traces de : Ti ; Ca ; Na ; K ; Fe ; Cr ; Mg ; Ni ; Cu. Ses principaux constituants, outre l'oxygène, sont l’aluminium (20,90 %), le silicium (21,76 %), et l’hydrogène (1,56 %).
Matériaux cimentaires -- Revêtements protecteurs
Matériaux hybrides
Mortier
Mouillabilité
Nanotubes
Particules (matières)
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : The treatment of stone surfaces for their protection from ageing caused by natural and anthropogenic effects is an open issue in materials development for Cultural Heritage. We thought interesting to verify the suitability of a modified cellulose biofilm filled with halloysite nanotubes as wax compatibilizers to design a protecting layer. A hydraulic mortar was selected as a stone prototype. To improve the physico-chemical properties of the covering layer, wax microparticles have been incorporated to control transport, consolidation and wettability features. In particular, different application protocols have been studied, namely brushing and spraying, to assess whether the proposed procedures can be scaled up. Colorimetric analysis has been carried out to evidence the applicability in terms of color alteration after the treatment. Water adhesion was investigated by measuring the contact angle values as a function of time to obtain information on spreading and adsorption phenomena. These physico-chemical properties have been correlated to the microstructure evidenced by both electron and optical microscopies. Note de contenu : - EXPERIMENTAL SECTION : Materials - Methods - Stone sample materials - Application on stone surface
- RESULTS AND DISCUSSION : Preparation and morphological properties of the protective coating - Colorimetric analysis and wettability
- Table 1 : Color Parameters a
- Table 2 : Fitting parameters from water contact angle dataDOI : https://doi.org/10.1007/s11998-021-00522-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00522-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36821
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible A review of plasma-based superhydrophobic textiles: theoretical definitions, fabrication, and recent developments / Esmaeil Eslami in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : A review of plasma-based superhydrophobic textiles: theoretical definitions, fabrication, and recent developments Type de document : texte imprimé Auteurs : Esmaeil Eslami, Auteur ; Reza Jafari, Auteur ; Gelareh Momen, Auteur Année de publication : 2021 Article en page(s) : p. 1635-1658 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Durée de vie (Ingénierie)
Hydrophobie
Mouillabilité
Technique des plasmas
Textiles et tissus
Traîtements de surfaceIndex. décimale : 667.9 Revêtements et enduits Résumé : In this review, we present a comprehensive survey of techniques used to fabricate superhydrophobic—extreme nonwetting—textiles by plasma systems. First, we provide a brief introduction to superhydrophobic surfaces, plasma sources, and plasma surface processing. We then assess the plasma-based techniques capable of producing the required rough surface micronanotextures of superhydrophobic surfaces. The implications of tailoring the specific surface chemistry and texture will be discussed, and finally, we summarize future challenges and issues to be addressed for ensuring a better understanding and use of superhydrophobic fabrics. Note de contenu : - Superhydrophobic surfaces
- Plasma sources
- Progress in developing superhydrophobic textiles using plasma technology
- Plasma pretreatment and post-treatment process
- Plasma functionalization (grafting)
- Plasma polymerized coating
- Challenges on durability and stability of superhydrophobic textiles
- Table 1 : Plasma treatment versus traditional wet processing techniques
- Table 2 : Evaluation of mechanical or chemical stability of plasma treated fabricsDOI : https://doi.org/10.1007/s11998-021-00523-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00523-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36822
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible Synthesis, analysis, and application of lactide-based polyester as coating with improved mechanical and rheological behavior / Rushikesh S. Chanpurkar in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : Synthesis, analysis, and application of lactide-based polyester as coating with improved mechanical and rheological behavior Type de document : texte imprimé Auteurs : Rushikesh S. Chanpurkar, Auteur ; Gajanan P. Lakhawat, Auteur ; Ruta D. Khonde, Auteur Année de publication : 2021 Article en page(s) : p. 1659-1668 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Anticorrosifs
Anticorrosion
Biomatériaux
Caractérisation
Essais de brouillard salin
LactideLe lactide est le diester cyclique de l’acide lactique et le monomère qui permet de synthétiser le PLA (Poly Lactique Acide) par polymérisation d’ouverture de cycle (ROP).
Issu de l’acide lactique (ou acide 2-hydroxypropanoïque) et produit par fermentation du saccharose ou du glucose, le lactide est d’origine naturelle et renouvelable. Ce produit s’inscrit parfaitement dans le cadre du développement de la chimie verte. Le lactide, étant issu de l’acide lactique qui possède 2 formes stéréo-isomériques (acide lactique L(+) et acide lactique D(-)),existe sous 3 formes stéréo-isomériques : la forme L-lactide, la forme D-lactide et la forme Méso-lactide.
Métaux -- Revêtements protecteurs
Polycondensation
Polyesters
Polymères -- Synthèse
Revêtements -- Propriétés mécaniques
Revêtements organiques
RhéologieIndex. décimale : 667.9 Revêtements et enduits Résumé : Lactide-based polyester resin was synthesized from diethylene glycol and phthalic anhydride with 20, 30, and 40% lactide compositions. The lactide was prepared from lactic acid and the polyester resin was functionalized with carbon–carbon crosslinking by polycondensation reaction. The purpose of this investigation was to enhance the properties such as thermal, mechanical, and rheological behavior of polyester resin synthesized using lactide. The resin was also characterized for acid values, hydroxyl values, and bio-based content. The bio-based content varied from 76 to 92% for variable composition of lactide in the resin. Acid value confirmed the formation of polyester resin and the hydroxyl value indicated the occurrence of crosslinking. The flow viscosity is an important characteristic of resins that are intended to be used as matrix in composite applications, and it was measured at different stress levels at varied temperatures. The performance of a mild steel specimen coated with the synthesized polyester was evaluated for mechanical properties such as tensile strength, impact resistance, flexibility, scratch resistance, and adhesion test. It revealed that lactide-based polyester resin had better mechanical, rheological, and anticorrosive properties than simple polyester resins. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of lactide - Preparation of lactide-based polyester
- CHARACTERISATION : FTIR analysis - Acid value - Hydroxyl value - Bio-based content - Viscosity measurement - Mechanical analysis
- RESULTS AND DISCUSSION : FTIR analysis - Acid value and hydroxyl value - Bio-based content - Rheological analysis - Mechanical analysis - Adhesion strength - Salt spray test
- Table 1 : Rheological properties of lactide-based polyester
- Table 2 : Mechanical properties of lactide-based coatingDOI : https://doi.org/10.1007/s11998-021-00525-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00525-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36823
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible Integration of antifouling and foul-release moieties for optimizing the performance of PEG-silicone coatings / Jiankun Hu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : Integration of antifouling and foul-release moieties for optimizing the performance of PEG-silicone coatings Type de document : texte imprimé Auteurs : Jiankun Hu, Auteur ; Haichun Zhang, Auteur ; Baoku Sun, Auteur ; Ading Lu, Auteur ; Guolun Zhong, Auteur ; Zhengfei Chen, Auteur Année de publication : 2021 Article en page(s) : p. 1669-1677 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Angle de contact
Antimicrobiens
Caractérisation
Essais (technologie)
Gonflement (physique)
Polyéthylène glycol
Réseaux polymères
Revêtements antisalissures
Rugosité
SiliconesLes 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 : Antifouling coatings are critical in preventing the surface of sea vessels being heavily fouled by bio-organisms. In this work, we attached biocidal moieties (Isobornyl methacrylate, IBOMA) to the side chains of the polyacrylic polymer to form the antifouling polymer (AFP). Then, the hydrophilic polysiloxane (HP) was prepared through the polyaddition of polyethylene glycol (PEG) and alkoxysilane onto the main chain of the hydrogen silicone oil. Finally, the hydrophilic fouling release coatings (FRCs) were formed by the reaction or winding of antifouling polymer and HP polymer with an interpenetrating polymer network (IPN) method (IPN-FRCs). The effects of the content of AFP and HP on the adhesion, surface roughness, and antifouling performance of the applied coatings on substrate are thoroughly studied and revealed in details through different analytic techniques. The IPN-FRCs exhibit high adhesion strength to the substrate, and the surface roughness is greatly reduced when submerged in seawater. Furthermore, the IPN-FRCs have high performance against seawater bio-organisms, such as barnacles, during both in-lab and marine field tests when right polymer ratios were chosen. Thus, the novel FRCs may have great potential to be applied for marine vessels in line with their low-cost in raw materials and high performance of the final products. Note de contenu : - EXPERIMENTAL : Materials - Preparation of antifouling coat - IPN-FRCs characterization - Marine field tests
- RESULTS AND DISCUSSION : FTIR analysis - Swelling rate analysis - Contact angle measurement - Adhesion force of the coatings - Surface roughness - Fluorescence microscopy analysis for algae inhibition performance - Marine field test - Antifouling mechanism
- Table 1 : Compositions of IPN-FRCsDOI : https://doi.org/10.1007/s11998-021-00526-5 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00526-5.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36824
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible Synthesis of silicone-acrylic-modified high-ortho novolac resin with enhanced thermal resistance and surface coating properties / Serkan Emik in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : Synthesis of silicone-acrylic-modified high-ortho novolac resin with enhanced thermal resistance and surface coating properties Type de document : texte imprimé Auteurs : Serkan Emik, Auteur ; Tülin Banu Iyim, Auteur ; Saadet özgümüs, Auteur Année de publication : 2021 Article en page(s) : p. 1679-1690 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse thermique
Caractérisation
Polymères -- Synthèse
Résistance à l'humidité:Résistance à l'eau
Revêtements -- Propriétés chimiques
Revêtements -- Propriétés physiques
Revêtements -- Propriétés thermiques
Revêtements organiques
SiliconesLes 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).
VinyltriméthoxysilaneIndex. décimale : 667.9 Revêtements et enduits Résumé : In the present study, vinyltrimethoxysilane was used to modify high-ortho novolac resin (NR) to obtain a vinyl silicone-modified phenolic oligomer (Si-mod NR). Subsequently, this oligomer is polymerized with methyl methacrylate. The mid-products (NR and Si-mod NR) and synthesized silicone-modified phenolic/acrylic resin (Ac/Si-mod NR) were characterized by Fourier transform infrared spectroscopy, and thermal properties were investigated by using thermal gravimetric analysis and differential scanning calorimetry techniques. In addition, the surface coating properties, including drying, hardness, adhesion, impact resistance, gloss, acid, alkaline, water, and solvent resistance of the films prepared from these products, were comparatively investigated. The results showed that the modification reactions yield a novel resin (Ac/Si-mod NR), which can be easily used as a surface coating material with high thermal resistance, flexibility, and excellent film properties. Note de contenu : - EXPERIMENTAL : Material and instruments - Synthesis of high-ortho novolac resin (NR) - Synthesis of silane and vinyl-modified novolac intermediate (Si-mod NR) - Polymerization of Si-mod NR intermediate with the acrylic monomer (Ac/Si-mod NR) - Film preparation - Characterization of surface coating properties
- RESULTS AND DISCUSSION : Synthesis and characterization studies - Film properties of the products -
- Table 1 : The list of surface coating test standards
- Table 2 : Specific weight loss temperatures and the char yields of the products
- Table 3 : Film properties of the products (drying, adhesion, hardness, impact resistance, and gloss)
- Table 4 : Water resistance properties of the films
- Table 5 : Alkaline resistance properties of the films
- Table 6 : Acid resistance properties of the films
- Table 7 Solvent resistance properties of the filmsDOI : https://doi.org/10.1007/s11998-021-00527-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00527-4.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36825
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Code-barres Cote Support Localisation Section Disponibilité 23146 - Périodique Bibliothèque principale Documentaires Disponible Influence of iron and nickel on the microwave absorption and other functional properties of nanographite-based nanocomposite paints / Anjali Prakash in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
[article]
Titre : Influence of iron and nickel on the microwave absorption and other functional properties of nanographite-based nanocomposite paints Type de document : texte imprimé Auteurs : Anjali Prakash, Auteur ; Avanish K. Srivastava, Auteur ; Mritunjay Kumar Pandey, Auteur ; Ramamoorthy Nagarajan, Auteur ; Amitava Bhattacharyya, Auteur Année de publication : 2021 Article en page(s) : p. 1691-1698 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Absorption
Analyse morphologique
Analyse structurale (ingénierie)
Epoxydes
Fer
Granulométrie
Graphite
Matériaux hybrides
Micro-ondes
Nanoparticules
NickelLe nickel est un élément chimique, de symbole Ni et de numéro atomique 28.
Le nickel est un métal blanc argenté qui possède un éclat poli. Il fait partie du groupe du fer. C'est un métal ductile (malléable). On le trouve sous forme combinée au soufre dans la millérite, à l'arsenic dans la nickéline.
Grâce à sa résistance à l'oxydation et à la corrosion, il est utilisé dans les pièces de monnaie, pour le plaquage du fer, du cuivre, du laiton, dans certaines combinaisons chimiques et dans certains alliages. Il est ferromagnétique, et est fréquemment accompagné de cobalt. Il est particulièrement apprécié pour les alliages qu'il forme.
Résistance aux conditions climatiques
Revêtements organiques
Revêtements:Peinture
Rhéologie
Taille des particulesIndex. décimale : 667.9 Revêtements et enduits Résumé : In the present study, we address the combined response of iron (Fe) and nickel (Ni) metal powders on the microwave absorption properties of nanographite (NG) particles in the 8–18 GHz frequency band. NG was synthesized from graphite via high-energy planetary ball mill (wet milling). Similarly, hybrid Fe-Ni-NG particles in two individual (25:25:50 and 37.5:37.5:25) ratios were synthesized and characterized for studying their structural and morphological properties. Further, the samples were dispersed in epoxy-based aero-grade paints to analyze their particle size and rheological properties. Thus, produced nanocomposite paints were coated on aluminum sheets for analyzing their functional properties including impedance measurement and microwaves absorbency measurements. The hybrid nanoparticle coatings exhibited a reflection loss of − 21 dB for 25:25:50 (Fe-Ni-NG) sample at 18 GHz and nearly − 18 dB for 37.5:37.5:25 (Fe-Ni-NG) sample for a wider frequency range from 14 to 18 GHz with a coating thickness of 1.8 mm. These advanced nanoparticles can be used for the development of flexible coatings in various defense applications including stealth aircrafts and low observable technologies in the future. Note de contenu : - Morphological and structural analysis
- Particle size distribution and rheological behavior
- Weathering and anti-aging properties
- Electrical impedance and electromagnetic reflection lossDOI : https://doi.org/10.1007/s11998-021-00531-8 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00531-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36826
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