Improved adhesion of PMSQ hard coatings on polymer substrates / Yu-Chih Kao in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 6 (11/2011)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 6 (11/2011) . - p. 779-783 Titre : Improved adhesion of PMSQ hard coatings on polymer substrates Type de document : texte imprimé Auteurs : Yu-Chih Kao, Auteur ; Chau-Nan Hong, Auteur Année de publication : 2011 Article en page(s) : p. 779-783 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Adhésion Dureté (matériaux) Hydroxylation Polyméthacrylate de méthyle Le poly(méthacrylate de méthyle) (souvent abrégé en PMMA, de l'anglais Poly(methyl methacrylate)) est un polymère thermoplastique transparent obtenu par polyaddition dont le monomère est le méthacrylate de méthyle (MMA). Ce polymère est plus connu sous son premier nom commercial de Plexiglas (nom déposé), même si le leader global du PMMA est Altuglas International9 du groupe Arkema, sous le nom commercial Altuglas. Il est également vendu sous les noms commerciaux Lucite, Crystalite, Perspex ou Nudec. Polyméthylsilsesquioxane Revêtements:Peinture Triméthyléthoxysilane Index. décimale : 667.9 Revêtements et enduits Résumé : Various surface treatment methods were investigated to improve the adhesion of abrasion-resistant polymethylsilsesquioxane (PMSQ) coatings on the optical resins. The adhesion of PMSQ films was improved on polymethylmethacrylate (PMMA), polycarbonate (PC), and PC/acrylonitrile butadiene styrene (ABS) by pretreating their surface with O2 plasma or chromic acid followed by surface grafting with trimethyl ethoxysilane (TMES). After the O2 plasma and the subsequent TMES treatments, the adhesion of PMSQ coating on PMMA substrate was significantly enhanced by the reduction of the percentage of peeling area from ~100% to <1% in cross cut tests. After the chromic acid and the subsequent TMES treatments of PC and PC/ABS substrates, the adhesion of PMSQ coatings was also significantly enhanced by reducing the percentages of peeling areas from nearly 100% to 50% and <1%, respectively, for PC and PC/ABS. The PMSQ coating might increase the hardness of the polymer by two to three levels. DOI : 10.1007/s11998-011-9367-5 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9367-5.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12605 [article]

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Polymethylsilsesquioxane powder prepared by morphology-controlled growth and its composite with waterborne latex for superhydrophobic coating fabrication / Baiyu Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 5 (09/2019)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 5 (09/2019) . - p. 1283-1294 Titre : Polymethylsilsesquioxane powder prepared by morphology-controlled growth and its composite with waterborne latex for superhydrophobic coating fabrication Type de document : texte imprimé Auteurs : Baiyu Li, Auteur ; Chunxiao Zhang, Auteur ; Fei Jing, Auteur ; Xiang Li, Auteur ; Naipu He, Auteur ; Zaiman Liu, Auteur Année de publication : 2019 Article en page(s) : p. 1283-1294 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Hydrophobie Latex Polyméthylsilsesquioxane Revêtements en phase aqueuse Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : The incompatibility of superhydrophobic particles with waterborne latexes impedes the direct mixing of them to make mixtures for superhydrophobic coatings fabrication. Polymethylsilsesquioxane (PMSQ) prepared by methyltrialkoxysilane precursors can change from hydrophilic to hydrophobic with the increased degree of condensation. This property makes PMSQ suitable for compounding with waterborne latexes for highly hydrophobic coatings fabrication. The present work presents a method for the morphology control of PMSQ to make highly porous PMSQ particles with micro-/nano-roughness on the surface. A gel of PMSQ was first prepared in aqueous medium and broken into small pieces by a high speed homogenizer; additional acid-catalyzed hydrolyzate of methyltrimethoxysilane was added to this dispersion of broken particles. The following base-catalyzed regrowth of PMSQ on the preformed gel skeleton gave highly porous PMSQ powder suitable for compounding with waterborne latexes. The composite of PMSQ wet powder and a styrene-acrylate waterborne latex gave a superhydrophobic coating after drying in ambient condition, of which the water contact angle reaches 153.1° and sliding angle is low to 28.7°. Note de contenu : - EXPERIMENTAL : Materials - Preparation of PMSQ gel - Base-catalyzed regrowth in the environmnet of preformed gel small pieces - Preparation of composite coatings of PMSQ powder and waterborne latex - Characterization - RESULTS AND DISCUSSION : Gel formation - Base-catalyzed regrowth of PMSQ in the preformed gel dispersion - Composite coatings of PMSQ wet powder and waterborne latex DOI : 10.1007/s11998-019-00204-7 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00204-7.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33011 [article]

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Sensory analysis of cosmetic powders in emulsions / François Bouton in PERSONAL CARE EUROPE, Vol. 11, N° 2 (04/2017)  

[article]  inPERSONAL CARE EUROPE > Vol. 11, N° 2 (04/2017) . - p. 51-53 Titre : Sensory analysis of cosmetic powders in emulsions Type de document : texte imprimé Auteurs : François Bouton, Auteur ; Manon Moussour, Auteur ; Marc Lavarde, Auteur ; Anne-Marie Pensé-Lhéritier, Auteur Année de publication : 2017 Article en page(s) : p. 51-53 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse sensorielle Emulsions -- Emploi en cosmétologie Polyméthylsilsesquioxane Poudres -- Emploi en cosmétologie Index. décimale : 668.5 Parfums et cosmétiques Résumé : A protocol of sensory evaluation is developed to characterise pure cosmetic powders and their impact on emulsions. A collective effort using a qualified group of people was necessary to develop the lexicon and definitions. The group of panellists is able to characterise products and provide sensory profiles that are relevant to assess sensory profiles for a collection of attributes about appearance, pick-up, application and after-feel phases. In this study, we worked on Mirasil Micropearl 40, a white pure polymethylsilsesquioxane resin with a specifil distribution of pacticle sizes. We also have shown that the addition of Mirasil Micropearl 40 (at 5.5% of concentration) into the emulsion increases significantly the cushion effect and the smoothness without affecting the slipperiness and the speadability. Note de contenu : - Method of sensory profile - TABLES : 1. Raw materials for protocol development and sensory evaluation - 2. Raw materials for evaluation - 3. Sensory attributes and references in products (powders and emulsions with powders) - FIGURE : Radar of Mirasil Micropearl 40 powder and emulsion with and without Mirasil Micropearl 40 (5,5% w/w) obtained by quantitative sensory profil method En ligne : https://drive.google.com/file/d/1vM5rsmxplaXXuARePKNBH6sKRyv0V-c5/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28337 [article]

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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]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 4 (07/2015) . - p. 801-805 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 sodium Index. 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 : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24415 [article]

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