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Characterization of colloidal particles formed in plastic coating solution at room temperature / Yasuhiro Matoba in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 5 (09/2020)
[article]
Titre : Characterization of colloidal particles formed in plastic coating solution at room temperature Type de document : texte imprimé Auteurs : Yasuhiro Matoba, Auteur ; Ryo Akao, Auteur ; Masaki Nakazawa, Auteur ; Hideyo Ando, Auteur ; Shigeru Tasaka, Auteur Année de publication : 2020 Article en page(s) : p. 1343–1349 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Caractérisation
Colloides
Lumière -- Diffusion
Méthyltriméthoxysilane
Revêtement en plastique
Spectrométrie infrarougeIndex. décimale : 667.9 Revêtements et enduits Résumé : The structure of solution of methyltrimethoxysilane (MTMS), which is used for hard coating for plastic materials through its sol–gel reactions, was investigated by light scattering, atomic force microscopy, infrared spectroscopy, and X-ray diffraction. Although hard films can be formed only after heating the MTMS solution and no significant increase in viscosity can be found at room temperature, colloidal particles were detected in the solution by light scattering immediately after adding the catalyst. Particles with a size comparable to that determined by light scattering were observed by atomic force microscopy. The change induced by the growth of the particles was measured for 4 weeks. The infrared spectroscopy and X-ray diffraction for the solutions changed gradually, which supports the formation and growth of the colloidal particles. These results indicate a very slow reaction of MTMS and structural change in the solution even at room temperature, which can affect successful coating of plastic materials using MTMS. DOI : https://doi.org/10.1007/s11998-020-00355-y En ligne : https://link.springer.com/content/pdf/10.1007/s11998-020-00355-y.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34577
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Code-barres Cote Support Localisation Section Disponibilité 22303 - Périodique Bibliothèque principale Documentaires Disponible A novel adsorption method to simulate the dirt pickup performance of organic coatings / Shuxue Zhou in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 1 (01/2018)
[article]
Titre : A novel adsorption method to simulate the dirt pickup performance of organic coatings Type de document : texte imprimé Auteurs : Shuxue Zhou, Auteur ; Yang Yang, Auteur ; Tao Wang, Auteur ; Hongyu Chen, Auteur ; James Bohling, Auteur ; Alvin M. Maurice, Auteur ; Limin Wu, Auteur Année de publication : 2018 Article en page(s) : p. 175-184 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adsorption
Cendres
Cendres de riz et constituants
Essais (technologie)
Méthyltriméthoxysilane
Résistance à la salissure
Revêtements organiquesIndex. décimale : 667.9 Revêtements et enduits Résumé : The evaluation of the dirt resistance of organic coatings according to traditional accelerated methods (e.g., the standard method GB/T 9780-2013 in China) usually provides results which deviate from their real-world performance in seriously polluted environments. As an alternative, a novel adsorption method with methyltrimethoxysilane-modified rice-straw ash as the artificial dirt standard was proposed in this paper. With this method, the ash was dispersed into the air in a testing chamber and then allowed to physically adsorb to the coating, which is believed to more accurately simulate the adsorption behavior of floating particulates outdoors. Two groups of latex coatings from Dow Chemical Company were employed to evaluate the adsorption method by monitoring the changes in color, whiteness, and reflectivity. In parallel, outdoor exposure testing of these coatings was conducted. The influences of charging method, of ash type, and panel position on the testing results were carefully investigated. Multicharging of ash (9 g × 3) and parallel panels at different positions in the testing chamber are designed for the generation of repeatable results. It was demonstrated that the adsorption method basically matched the outdoor exposure results and was more predictive of real-world results than GB/T 9780-2013. Note de contenu : - EXPERIMENTAL SECTION : Materials - Preparation of standard dirt - Testing apparatus and method - Outdoor exposure testing - Characterization
- RESULTS AND DISCUSSION : Preparation of standard dirt - Influence of the type of dirt - Influence of charging method of ash - Influence of testing panel position - Examination of the repeatibility of adsorption method - The feasibility of adsorption methodDOI : 10.1007/s11998-017-9971-0 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9971-0.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30110
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Code-barres Cote Support Localisation Section Disponibilité 19610 - Périodique Bibliothèque principale Documentaires Disponible Sodium silicate-assisted emulsification of methyltrimethoxysilane and formation of superhydrophobic coating thereof / Ying Wang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 4 (07/2015)
[article]
Titre : Sodium silicate-assisted emulsification of methyltrimethoxysilane and formation of superhydrophobic coating thereof Type de document : texte imprimé Auteurs : Ying Wang, Auteur ; Sheng Yang, Auteur ; Jin Fang, Auteur ; Baiyu Li, Auteur Année de publication : 2015 Article en page(s) : p. 801-805 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Emulsions
Hydrophobie
Méthyltriméthoxysilane
Polyméthylsilsesquioxane
Revêtements
Silicate de sodiumIndex. décimale : 667.9 Revêtements et enduits Résumé : Polymethylsilsesquioxane (PMSQ) is highly heat and weather resistant and is excellent as a coating material. In the present work, the precursor for PMSQ, methyltrimethoxysilane (MTMS), was emulsified in aqueous medium with the aid of sodium silicate. It was found that at a proper concentration and ratio of MTMS to sodium silicate, the precursor MTMS could be emulsified to form an emulsion. After drying the coated emulsion on a substrate in air at room temperature, a superhydrophobic coating with water contact angle of 153° was obtained. Scanning electronic microscopy characterization indicates that the coating consists mainly of interconnected sub-100 nm particles from emulsion droplets. During drying, PMSQ formed in the emulsion droplet penetrated the outer surface of the emulsified particle, imparting hydrophobicity and nanoscale roughness to the surface. These roughness and hydrophobic properties resulted in superhydrophobicity of the coating. The process is simple and has potential for large area fabrication of superhydrophobic surfaces. DOI : 10.1007/s11998-015-9671-6 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9671-6.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24415
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Code-barres Cote Support Localisation Section Disponibilité 17366 - Périodique Bibliothèque principale Documentaires Disponible The preparation and characterization of abrasion-resistant coatings on polycarbonate / Yu-Hong Chen in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 10, N° 1 (01/2013)
[article]
Titre : The preparation and characterization of abrasion-resistant coatings on polycarbonate Type de document : texte imprimé Auteurs : Yu-Hong Chen, Auteur ; Li-Xiang Liu, Auteur ; Mao-Sheng Zhan, Auteur Année de publication : 2013 Article en page(s) : p. 79-86 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion
Caractérisation
Dureté (matériaux)
Méthyltriméthoxysilane
Polycarbonates
Résistance à l'abrasion
Revêtements
Sol-gel, ProcédéIndex. décimale : 667.9 Revêtements et enduits Résumé : A series of abrasion-resistant coatings based on methyltrimethoxysilane (MTMS), tetraethoxysilane (TEOS), and methacyloxypropyltrimethoxysilane (MEMO) were synthesized via a sol–gel method and applied to polycarbonate (PC) substrate. Through a comparison with an uncoated PC substrate, hardness, adhesion, and abrasion resistance of coated PC substrates were investigated. Fourier transform infrared (FTIR) spectra of these coatings before and after being cured indicated that the crosslinked structure of Si–O–Si was formed via the hydrolysis–condensation reactions of alkoxy silane. The optical test results showed that coated PC substrates possessed higher transmittance and lower haze than uncoated PC substrates. The hardness and adhesion data demonstrated that PC substrates coated with the hybrid coatings (MTMS/TEOS/MEMO coatings) possessed the greatest hardness and optimal adhesion. After 500 wear cycles, the PC substrate with MTMS/TEOS/MEMO coatings showed some grooves and wear tracks without any spallation or delamination, and there was a decrease of only 1.0–1.3% in transmittance and an increase of only 5.68–7.44% in haze. Whereas uncoated PC substrate and substrates with MTMS and MTMS/TEOS (molar ratio is 1.5:1) coatings exhibited a decrease of 3.3, 3.9, and 2.4% in transmittance and an increase of 30.19, 17.42, and 12.35% in haze, respectively. Note de contenu : - EXPERIMENTAL : Materials - Preparation of coating solutions - Preparation of coatings on PC substrates - Characterization
- RESULTS AND DISCUSSION : The properties of MTMS/TEOS coatings (The chemical structure - The optical properties - The hardness and adhesion - The abrasion resistance) - The properties of MTMS/TEOS/MEMO coatings (The optical properties - The hardness and adhesion - The abrasion resistance - Morphological observations of M and MTM-1.0 before and after being worn)DOI : 10.1007/s11998-012-9430-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9430-x.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17475
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Code-barres Cote Support Localisation Section Disponibilité 14636 - Périodique Bibliothèque principale Documentaires Disponible 15124 - Périodique Bibliothèque principale Documentaires Disponible