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The preparation of superhydrophobic photocatalytic fluorosilicone/SiO2–TiO2 coating and its self-cleaning performance / Lijun Zong in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 5 (09/2021)
[article]
Titre : The preparation of superhydrophobic photocatalytic fluorosilicone/SiO2–TiO2 coating and its self-cleaning performance Type de document : texte imprimé Auteurs : Lijun Zong, Auteur ; Yaping Wu, Auteur ; Xingeng Li, Auteur ; Bo Jiang, Auteur Année de publication : 2021 Article en page(s) : p. 1245-1259 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Dioxyde de silicium
Dioxyde de titane
Fluorosilicones
Hydrophobie
Photocatalyse
Revêtement auto-nettoyant
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : Nanographite-zinc particles in various ratios were synthesized by high energy ball milling and dispersed in epoxy based aero grade resins for studying their microwaves absorption in the lower frequency band of 2–9 GHz using a coaxial waveguide measurement system. Morphological characterizations of the synthesized particles showed that shuttle shaped zinc is well embedded on the exfoliated nanographite particles without any agglomeration. The higher interfacial polarization of both the graphite and zinc particles contributes to the excellent electrical conductivity and hence refers it as an ideal microwave absorber in defense applications. The paint with 20% (w/v) loading of nanographite-zinc (1:1 ratio) particles is proficient in providing microwave absorption of − 18.06 dB at 8.19 GHz with a coating thickness of 1.43 mm. Note de contenu : - EXPERIMENTAL SECTION : Materials - Sample preparation - Sample characterization
- RESULTS AND DISCUSSION : Effects of TiO2 addition amount on the wettability change - Effects of SiO2 addition amount on the wettability change - Photocatalytic degradation performances - Morphology characteristic analysis and the self-cleaning performance
- Table 1 : The surface roughness, microstructure, hydrophilic transition under UV, and photocatalytic performance of prepared coatings
- Table 2 : The pollution performance and hydrophobicity recovery of three typical coatings with different surface characteristicsDOI : https://doi.org/10.1007/s11998-021-00485-x En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00485-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36429
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Code-barres Cote Support Localisation Section Disponibilité 22991 - Périodique Bibliothèque principale Documentaires Disponible The race for improved weathering / Matt Andersson in EUROPEAN COATINGS JOURNAL (ECJ), N° 1 (01/2021)
[article]
Titre : The race for improved weathering : A UV analysis technique that speeds up product development Type de document : texte imprimé Auteurs : Matt Andersson, Auteur ; Karl Booth, Auteur Année de publication : 2021 Article en page(s) : p. 40-43 Langues : Anglais (eng) Catégories : Brillance (optique)
Caractérisation
Fourier, Spectroscopie infrarouge à transformée de
Indice carbonyle
Photo-oxydation
Photodétérioration
Rayonnement ultraviolet A
Réflexion totale atténuée
Résistance aux conditions climatiques
Revêtements -- Détérioration
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : New product development and major reformulation of high-durability exterior coatings are among the highest risk projects a coatings lab can undertake. This is due to the years-long exterior exposure time required to validate a new product's performance, in addition to the standard formulation and test cycle time of several months. Many attributes are associated with the assessment of a coating's weatherability, such as grain-crack resistance, adhesion and chalk. In the architecture semi-gloss to high-gloss space, an emphasis has rightly been placed on gloss retention as a distinguishing attribute between high performance and economy product classes. Note de contenu : - Gloss retention today
- Gloss retention and photodegradaton
- Our improved method : ATR-FTIR characterisation
- How we did it
- Correlating carbonyl index and cyclic UVA
- Accelerating development
- Fig. 1 : ATR-FTIR characterisation
- Fig. 2 : Assignment of onset of failure by photooxidation
- Fig. 3 : Carbonyl index at one week exposure vs onset of gloss failure
- Fig. 4a : δcarbonyl index measured after 24hrs cyclic UVA exposure
- Fig. 4b : Onset of failure of gloss retentionby cyclic UVA
- Fig. 5a : Carbonyl index after seven days exposure
- Fig. 4b : Onset of failure of gloss retention by cyclic UVA
- Fig. 5b : 168 h measurement of carbonyl index predicts relative performance of commercial HG polymers
- Table 1 : Infrared absorption wavelengths for relevant functionalitiesEn ligne : https://drive.google.com/file/d/1cti9HW3V9hdCZ-CucD5b287QTa2OkXg9/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35840
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Code-barres Cote Support Localisation Section Disponibilité 22760 - Périodique Bibliothèque principale Documentaires Disponible The reduction in ice adhesion using controlled topography superhydrophobic coatings / Yujie Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 2 (03/2023)
[article]
Titre : The reduction in ice adhesion using controlled topography superhydrophobic coatings Type de document : texte imprimé Auteurs : Yujie Wang, Auteur ; Jinde Zhang, Auteur ; Hanna Dodiuk, Auteur ; Samuel Kenig, Auteur ; Jo Ann Ratto, Auteur ; Carol Barry, Auteur ; Joey Mead, Auteur Année de publication : 2023 Article en page(s) : p. 469-483 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Caractérisation
Epoxydes
Fluoroalkylsilane
Hydrophobie
Interfaces solide-liquide
Liants
Mouillage (chimie des surfaces)
Nanoparticules
Revêtements organiques
SiliceLa 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.
TopographieIndex. 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 surfacesDOI : 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 : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39292
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 2 (03/2023) . - p. 469-483[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 24056 - Périodique Bibliothèque principale Documentaires Disponible The reinforcing effect of crosslinkable waterborne polyurethane/polysiloxane composite emulsion by aqueous sol–gel method / Yan Wu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
[article]
Titre : The reinforcing effect of crosslinkable waterborne polyurethane/polysiloxane composite emulsion by aqueous sol–gel method Type de document : texte imprimé Auteurs : Yan Wu, Auteur ; Junbao Wu, Auteur ; Yunxia Feng, Auteur Année de publication : 2020 Article en page(s) : p. 243-253 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Angle de contact
Caractérisation
Composites à fibres de carbone -- Propriétés mécaniques
Diffractométrie de rayons X
Matériaux -- Renforcement
Micrographie
Polymères en émulsion
Polyuréthanes
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).
Sol-gel, Procédé
ThermogravimétrieIndex. décimale : 667.9 Revêtements et enduits Résumé : A highly branched polysiloxane (S2) was prepared by an aqueous sol–gel process and used as an underlying crosslinker to modify silanized waterborne polyurethane (WPUS), and a novel crosslinked waterborne polyurethane (WPU)/polysiloxane composite with low VOC features was obtained. The good dispersibility of polysiloxane (S2) was proved by both TEM and DLS analyses, implying that the polysiloxane had an excellent intermiscibility with the WPU. The larger silsesquioxane network in the composite was proved by XPS, which was generated from the condensation of the Si–OH groups of polysiloxane and WPUS. On the basis of tensile results, the content of polysiloxane had a significant impact on the mechanical properties. The reinforcing and toughening synergy effect was found in the composite with a low concentration of S2. According to micrographs of the fracture surface, the dominating toughening mechanism was dependent on microcracks, while the high concentration of polysiloxane turned into silica particles in the WPU matrix, resulting in force concentration and degradation of the mechanical properties. However, the Young’s modulus increased with the increasing content of S2. Additionally, the incorporation of the crosslinked silsesquioxane structure also improved the hydrophobic properties and thermal stability of the composite. Note de contenu : - EXPERIMENTAL : Materials - Preparation of highly branched polysiloxane (S2) in aqueous medium - Preparation of waterborne polyurethane/polysiloxane composite emulsion - Characterization
- RESULTS AND DISCUSSION : Characterization of highly branched polysiloxane - Dispersibility of aqueous polysiloxane - Siliceous structure - Mechanical properties - Micrographs of fracture surfaces - Dynamic mechanical properties - Microstructure during the film formation - XRD - Surface contact angle of composite - Thermogravimetric analysisDOI : 10.1007/s11998-019-00264-9 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-019-00264-9.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33742
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Code-barres Cote Support Localisation Section Disponibilité 21517 - Périodique Bibliothèque principale Documentaires Disponible The skin's microbiome : Establishing a quality seal for cosmetics & consumer expectations / M. Brandt in SOFW JOURNAL, Vol. 149, N° 6 (06/2023)
[article]
Titre : The skin's microbiome : Establishing a quality seal for cosmetics & consumer expectations Type de document : texte imprimé Auteurs : M. Brandt, Auteur ; K. Unbereit, Auteur ; Gunja Springmann, Auteur ; Stephan Bielfeldt, Auteur Année de publication : 2023 Article en page(s) : p. 30-35 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation
Certification
Consommateurs -- Préférences
Cosmétiques
Justification de l'allégation
Labels
Microbiome cutanéIndex. décimale : 668.5 Parfums et cosmétiques Résumé : Quality seals being precisely defined, transparent and validated could help consumers in their decision making. This applies particularly for new categories of cosmetics e.g. those related to the human skin microbiome
The knowledge on the human skin’s microbiome grows rapidly and a huge number of cosmetic products with ‘microbiome’ claims are now seen on the global market.
Developing a credible and valid quality seal for supporting approved claims on skin microbiome is challenging.
Here we propose standards for a quality seal for cosmetic products claiming to be ‘microbiome friendly’.
We assume that such a claim can be made if: there is no significant change in microbial diversity as measured by e.g. the Shannon Index and there is also no significant dissimilarity between untreated and treated skin as measured by main component analysis (e.g. Unifrac distances); Also, it should be controlled that there is no strong increase or decrease in the abundance of single microbe genera. Further, evaluation of the skin in terms of clinical safety, skin pH and barrier integrity should also be performed.Note de contenu : - Consumer expectations
- Skin microbiome uniqueness
- Skin microbiome - The bad, good, and ugly
- Characterisation of the skin microbiome - Parameters and indices
- Establishing a quality microbiome seal
- Making cosmetic claims - Compliance and validationEn ligne : https://drive.google.com/file/d/1zcyDlKoUeQJnFaVgFs7Hxn6d22h4urIl/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39588
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Code-barres Cote Support Localisation Section Disponibilité 24111 - Périodique Bibliothèque principale Documentaires Disponible The study of the possibility of silicon dioxide coatings modified by (3-aminopropyl)triethoxysilane as protective materials for stone / Dan Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 2 (03/2020)
PermalinkThe synthesis, characterisation and molecular structure of a new hetarylazoindole dye studied by X-ray diffraction, spectral analysis and density functional theory calculation / Ebru Aktan in COLORATION TECHNOLOGY, Vol. 128, N° 5 (2012)
PermalinkThe tanning performance of dialdehyde cellulose prepared by electrochemical oxidation system / Hui Chen in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 6 (11-12/2019)
PermalinkThe thermal and non-thermal effects of microwave in the chrome tanning process / Jinwei Zhang in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 104, N° 2 (03-04/2020)
PermalinkThe use of Monte Carlo simulation to evaluate the optical properties of polyester fabric treated with titanium dioxide nanopigments / Laleh Asadi in COLORATION TECHNOLOGY, Vol. 139, N° 1 (02/2023)
PermalinkThe use of poly(styrene-co-chloromethyl styrene) in the modification of triglyceride oils / Tugba Hayri-Senel in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 5 (09/2022)
PermalinkThe use of profilometry to characterise the leather surface / Prosper Mhute in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 101, N° 1 (01-02/2017)
PermalinkThe water vapour permeability of leather finished by thermally responsive polyurethane / Haojun Fan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 89, N° 3 (05-06/2005)
PermalinkThermal analysis and modification of C/C ablative composites for high-temperature insulation applications / Hamed A. Al-Falahi in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 33, N° 6 (12/2023)
PermalinkThermal characterization and pyrolysis of waste leather treated with CoCl2 and MnCl2 / E. Bañón in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 2 (02/2021)
PermalinkThermal characterization of solvent-free epoxy coatings by rheology and kinetics combined / Weih Q. Lee in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 1 (01/2020)
PermalinkThermal sensitive agents for making stimuli responsive leathers / Jaya Prakash Alla in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXV, N° 12 (12/2020)
PermalinkThermal spray - An innovative tool / Nitisha Mangesh Sidam in PAINTINDIA, Vol. LXVII, N° 10 (10/2017)
PermalinkThermal stability of cyanate ester modified silicone rubber as matrix of heat-resistant composite coatings / Qing Wen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 6 (11/2023)
PermalinkThermal, tensile, electrical, dynamic mechanical thermal and rheological properties of polyvinylidene fluoride and fluoroelastomer composites filled with carbon black / M. D. Moezzi in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 1 (03/2019)
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