铝颜料的聚丙烯酸酯与SiO_2双重包覆改性  

Modification of Aluminum Pigments via Encapsulation with Polyacrylate and Silicon Dioxide

作　　者：高爱环[1] 皮丕辉[1] 路阳[1] 文秀芳[1] 程江[1] 杨卓如[1] 

机构地区：[1]华南理工大学化学与化工学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2010年第2期1-5,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(20976059);广东省自然科学基金资助项目(07006528)

摘　　要：为增强铝颜料的耐腐蚀性及与树脂的相容性,先后以溶胶-凝胶法和原位聚合法在铝颜料表面包覆SiO2和聚丙烯酸酯(PA),分析了SiO2和PA包覆铝颜料的机理,运用傅里叶变换红外光谱(FT-IR)、光电子能谱(XPS)和环境扫描电镜(ESEM)等表征了铝颜料的表面形貌和结构,并考察了原位聚合条件对包覆后铝颜料涂膜性能的影响.研究结果表明:单体用量为0.7g、聚合温度为85℃、聚合时间为4～5h时,制备的双重包覆铝颜料在树脂中的分散性和附着力明显增强,涂层具有良好的外观、光泽度和耐酸性.In order to enhance the corrosion resistance and resin consistence of aluminum pigments, SiO2 and polyacrylate were used to encapsulate the pigments by means of the sol-gel method and the in-situ polymerization, respectively. Then, the mechanism of encapsulation was analyzed, and the surface morphology and structure of the encapsulated pigments were characterized by means of FT-IR, XPS and ESEM. Moreover, the influences of encap- sulating conditions on the properties of the coating films containing encapsulated aluminum pigments were investigated. The results show that, with a monomer dosage of 0. 7 g, the aluminum pigments encapsulated at 85 ℃ for 4 - 5 h is of significantly-improved dispersibility and adhesion, which enables the coating film to possess good appearance, high glossiness, and strong acid resistance.

关 键 词：铝颜料 聚丙烯酸酯 二氧化硅 原位聚合 包覆 附着力 

分 类 号：TQ624[化学工程—精细化工]