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Deterioration Process of the Hybrid Films during Wear Test--Polyacrylate Emulsion Modified by Silica Particles
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作者 YANG Mingjun DENG Binbin YUAN Feifei 《Wuhan University Journal of Natural Sciences》 CAS CSCD 2017年第3期191-196,共6页
The hybrid materials are widely used in various fields for excellent performance. However, there are few researches studying their failure process. In order to prepare the hybrid materials with better performance, the... The hybrid materials are widely used in various fields for excellent performance. However, there are few researches studying their failure process. In order to prepare the hybrid materials with better performance, the failure process needs to be well studied. Two kinds of silica/polyacrylate films are successfully prepared to study the effect of organic-inorganic interaction on performance. The average diameter of silica particles is measured to be around 342 nm by scanning electron microscope(SEM). Wear test demonstrates the hybrid film, which is obtained by grafting polyacrylate onto silica particles, possesses more excellent properties than the one filled directly with silica particles. The stronger interaction between organic and inorganic components leads to a better distribution of inorganic particles within the polymer matrix. In this work, a model is presented to illustrate the deterioration process of the hybrid films, which allows us to further understand the hybrid materials. 展开更多
关键词 hybrid materials deterioration mechanism silica/polyacrylate films
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Pu(u)A/SiO_2杂化水分散液及成膜性能研究
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作者 宋春梅 喻志刚 +1 位作者 袁荞龙 王得宁 《材料科学与工艺》 EI CAS CSCD 北大核心 2005年第4期344-346,共3页
用异佛尔酮二异氰酸酯(IPDI)、聚酯二元醇、二羟甲基丙酸(DMPA)、乙二胺、二乙醇胺、甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)、甲基丙烯酸羟乙酯(HEMA)通过原位聚合方法合成了聚氨酯(脲)/聚丙烯酸酯水分散液,并且通过溶胶-凝胶方法合成了... 用异佛尔酮二异氰酸酯(IPDI)、聚酯二元醇、二羟甲基丙酸(DMPA)、乙二胺、二乙醇胺、甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)、甲基丙烯酸羟乙酯(HEMA)通过原位聚合方法合成了聚氨酯(脲)/聚丙烯酸酯水分散液,并且通过溶胶-凝胶方法合成了聚氨酯(脲)/聚丙烯酸酯/硅溶胶(PU(U)A/SiO2)杂化水分散液.杂化水分散液在pH值为7-11时的贮存稳定性大干1年;经高温、冻融试验后,无絮凝或沉淀出现, 与PU(U)A水分散液相同.杂化膜的摆杆硬度、粘附力、耐吸水性、耐溶剂性比无硅溶胶的膜性能好.PU(U) A/SiO2杂化水分散稀溶液成膜后的透射电镜(TEM)结果表明,粒径为8—10nm的硅溶胶(SiO2)包覆在粒径为50-200nm的PU(U)A粒子外围.ART—FTIR分析结果表明,杂化膜表面富含Si-O-Si官能团.AFM结果表明,与PU(U)A膜相比,杂化膜的硬区相畴尺寸变小. 展开更多
关键词 聚氨酯(脲)/聚丙烯酸酯 硅溶胶 杂化材料 水性涂料 膜性能
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