甲基丙烯酸丁酯在纳米TiO2表面的原位接枝  

Surface Modification of Nano-TiO_2 by in-situ Grafting Polymerization of Butyl Methacrylate

作　　者：张蕾[1] 赵中原[1] 金燕利 李绮[1] 

机构地区：[1]辽宁大学化学院,沈阳110036 [2]海军装备部驻沈阳军事代表局,沈阳

出　　处：《应用化学》2009年第5期547-550,共4页Chinese Journal of Applied Chemistry

基　　金：辽宁省教育厅科学技术研究(20060363和2007T053)资助项目

摘　　要：利用分子自组装技术,在纳米TiO2粒子表面上组装带不饱和基团C C的有机单分子层,并进行原位引发甲基丙烯酸丁酯(BMA)单体聚合反应,在纳米TiO2表面形成化学键合的聚合物层。讨论了不同反应条件对接枝率的影响,结果表明,单体BMA与甲苯体积比为5∶6,引发剂质量分数为0.5%,纳米粉用量为0.125 mol/L,反应温度为90℃,聚合时间为180 m in,接枝率达13.9%。用FTIR技术表征了接枝聚合物的结构,用TG和UV-V is测试了改性后纳米TiO2粒子的热失重率和分散稳定性。结果表明,改性后的纳米TiO2在THF中有良好的分散性(分散稳定性指数D为94%)。Silane coupling agent was used to introduce polymeric groups containing C=C onto the surface of nano-TiO2 particles by self-assembly technique. Then in-situ grafting polymerization was carried out between the functionalized particles and butyl methacrylate monomer to modify the surface of nano-TiO2. The effects of different reaction conditions on the grafting degree were studied, and the optimal conditions for the experiment were 5：6 the ratio of toluene to butyl methacrylate （BMA）, 0. 5% initiator, 0. 125 mol/L of the modified nano-TiO2, 3 h reaction time, and 90 % reaction temperature, and the grafting degree was 13.9%. FTIR,TG and UV-Vis results showed that new organic chains were introduced onto the surface of nano-TiO2, and the dispersion stability of the nano-TiO2 in organic phase was obviously improved.

关 键 词：纳米TIO2 硅烷偶联剂 甲基丙烯酸丁酯 接枝聚合 

分 类 号：O632[理学—高分子化学]