反相微乳液模板原位聚合制备纳米氯化银/聚甲基丙烯酸甲酯及其结构表征  

Reverse Microemulsion Template Polymerization in Site and Structure Characterization of Nano AgCl/PMMA Composites

作　　者：奚强[1] 赵春芳[1] 李蕾[1] 李亮[1] 赵雷[2] 程时远[2] 

机构地区：[1]武汉化工学院制药系,武汉430074 [2]湖北大学化学与材料学院,武汉430063

出　　处：《Chinese Journal of Chemical Physics》2003年第2期135-140,共6页化学物理学报（英文）

摘　　要：用甲基丙烯酸甲酯 (MMA)作油相 ,反相胶束微乳液作为模板 ,制备了纳米氯化银 (AgCl)粒子 ,再进行原位聚合制备了纳米氯化银 /聚甲基丙烯酸甲酯 (AgCl/PMMA)复合材料 .透射电镜 (TEM )分析表明 ,纳米AgCl的尺寸为 2 0～ 80nm .扫描电镜 (SEM )测试表明纳米AgCl粒子均匀地存在于PMMA基材中 .红外分析证明 ,胶束中水和表面活性剂AOT的羰基在MMA聚合后微观环境发生变化 ,纳米粒子同聚合物之间有吸附行为 .动态力学 (DMTA)分析复合材料 ,发现纳米AgCl粒子与聚合物之间存在强烈相互作用 ,形成了中间相层 (interphaselayer) ,改变了聚合物的动态力学性能 .The AgCl/PMMA nano-composite was prepared by polymerization of MMA in site through reverse micro-emulsion as template, in which the methyl methacrylate(MMA) was designated as oily phase instead of non-reactive functional group solvents. The advantage of this method is that nanocomposite are prepared without the process of modification of nano-particles with organic substances and dispersing them in the matrix. TEM shows that the particle size of nano-AgCl is 20 similar to 80 nm, and the scanning electron microscope (SEM) shows that nano-AgCl is dispersed in the PMMA. FTIR spectrum reveals that the micro-environment of H2O and carboxyl group has changed after the polymerization of MMA, which indicates that the interaction of nano-particle with polymer exists. DMTA spectrum results show that there is strong interaction of nano-particles with polymer chains, which restricts the mobility of polymer chains and forms an interphase layer. Ripening process affects the interaction of polymer with nano-particles. At the higher temperature ripening process, the interphase layer is overlapped and forms a continuous phase. DMTA reveals that the aqueous phase layer around the nano-particles does not apparently affect the interaction of polymer with the nano-particles and the nano-particles acts as a cross-linker in the nanocomposite.

关 键 词：聚甲基丙烯酸甲酯 氯化银 结构表征 反相微乳液 模板原位聚合 纳米复合材料 

分 类 号：TQ316.3[化学工程—高聚物工业]