A novel acrylate-PDMS composite latex with controlled phase compatibility prepared by emulsion polymerization / Weili Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 14, N° 6 (11/2017)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 14, N° 6 (11/2017) . - p. 1259-1269 Titre : A novel acrylate-PDMS composite latex with controlled phase compatibility prepared by emulsion polymerization Type de document : texte imprimé Auteurs : Weili Li, Auteur ; Wenjun Shen, Auteur ; Wei Yao, Auteur ; Jijun Tang, Auteur ; Jie Xu, Auteur ; Lei Jin, Auteur ; Jide Zhang, Auteur ; Zexiao Xu, Auteur Année de publication : 2017 Article en page(s) : p. 1259-1269 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosifs Anticorrosion Caractérisation Copolymère silicone acrylate Hydrophobie Latex Polymérisation en émulsion Stabilité thermique Index. décimale : 667.9 Revêtements et enduits Résumé : In this paper, a series of acrylate-polydimethylsiloxane (PDMS) composite latexes was prepared and studied systematically to find the factors that affect their performances. At first, the modified PDMS was synthesized to react with acrylate monomers and participate in free radical polymerization. Then, the modified PDMS was blended with acrylate monomers, and the acrylate-PDMS composite latexes with different formulas were obtained by emulsion polymerization. Because the blending monomers were constrained in the micelle, the two components were interconnected with each other by a covalent bond and the phase compatibility between the two components could be controlled well. Chemical constitution and the morphology of acrylate-PDMS composite latexes were confirmed by using FTIR spectroscopy, TEM, and SEM measurements, respectively. Thermophysics and heat resistance of the dried coatings based on acrylate-PDMS composite latexes were studied using DSC and TGA tests, respectively. Anticorrosion properties of the cured coatings based on acrylate-PDMS composite latexes were confirmed by potentiodynamic polarization test. With low surface tension, good toughness, excellent weather-proof properties, and good high and low temperature stability, the modified PDMS component can improve the performance of the traditional acrylate latex-based waterborne resin effectively, and the prepared acrylate-PDMS composite latexes can be used in heavy-duty anticorrosion applications. Note de contenu : - EXPERIMENT : Materials - Preparation of modified PDMS - Preparation of acrylate-PDMS composite latex - Coating procedure - Characterization - RESULTS AND DISCUSSION : FTIR measurement - Morphology measurements - Study on the influence of acrylate component on the properties of acrylate-PDMS composite latexes - Study on the influence of the modified PDMS on acrylate-PDMS composite latexes DOI : 10.1007/s11998-017-9923-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9923-8.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29626 [article]

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Study on a novel composite coating based on PDMS doped with modified graphene oxide / Jijun Tang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 2 (03/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 2 (03/2018) . - p. 375-383 Titre : Study on a novel composite coating based on PDMS doped with modified graphene oxide Type de document : texte imprimé Auteurs : Jijun Tang, Auteur ; Wei Yao, Auteur ; Weili Li, Auteur ; Jie Xu, Auteur ; Lei Jin, Auteur ; Jide Zhang, Auteur ; Zexiao Xu, Auteur Année de publication : 2018 Article en page(s) : p. 375-383 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Anticorrosion Composites Dispersions et suspensions Essais de résilience Oxyde de graphène Polydiméthylsiloxane Le polydiméthylsiloxane —[O-Si(CH3)2]n—, ou poly(diméthylsiloxane) selon la nomenclature systématique, communément appelé PDMS ou diméthicone, est un polymère organominéral de la famille des siloxanes souvent présent dans les shampoings. On l'y ajoute pour augmenter le volume des cheveux mais il peut également aller boucher les pores du cuir chevelu et rendre les cheveux gras. C'est une des raisons pour lesquelles se laver les cheveux tous les jours est très déconseillé avec un shampooing contenant des silicones. Il existe également de l'amodiméthicone, qui est un dérivé du diméthicone. Le polydiméthylsiloxane est un additif alimentaire (E900), utilisé comme antimoussant dans les boissons (Coca-Cola BlāK). La chaîne de poly(diméthylsiloxane) forme également la structure de base des huiles et des caoutchoucs silicones. Réaction de couplage Réticulants Revêtements Revêtements -- Propriétés mécaniques:Peinture -- Propriétés mécaniques Revêtements:Peinture Silanes Sol-gel, Procédé Tétraéthoxysilane Thermocinétique Index. décimale : 667.9 Revêtements et enduits Résumé : The low surface activity of graphene oxide (GO) stemming from its large conjugated electronic structure can easily affect the dispersion behavior of GO-based polymer matrices. This significantly undermines the properties of the resulting composite materials. Therefore, in order to increase the GO surface activity for use in polymer-based composites, GO was modified using silane coupling agent which was then doped into polydimethylsiloxane (PDMS) polymer to prepare novel paints by sol–gel reaction strategy. The subsequent novel composite coatings based on PDMS/modified GO (mGO) were finally cured with tetraethoxysilane as the hardening agent in the presence of dibutyltin dilaurate catalyst. The effect of doping mGO into PDMS polymer was systematically studied using infrared spectroscopy, micro-Raman spectroscopy, TEM, SEM, XRD, TGA, mechanical test, thermal conductivity test, and the erosion resistance test. It was concluded that the phase compatibility between GO and PDMS was enhanced due to the new interconnecting chemical bonds brought about by the mGO in the composite. Note de contenu : - EXPERIMENTAL : Materials - Preparations of graphene oxide and chlorination of graphene oxide - Preparation of composite coatings - Characterization - RESULTS AND DISCUSSION : Materials characterization - Morphological analysis - Thermal stability property - Mechanical properties - Thermal conductivity - Anticorrosion property DOI : 10.1007/s11998-017-9991-9 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9991-9.pdf Format de la ressource électronique : pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30296 [article]

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