Preparation of monodisperse polymer particles incorporating functional nanoparticles

提出了一种制备磁性纳米粒子等功能性纳米粒子的单分散聚合物粒子的有效方法。以二乙胺为溶剂和路易斯碱为催化剂，通过硅烷偶联反应，用甲基丙烯酰氧基丙基三甲氧基硅烷对磁性纳米粒子进行表面改性，使磁性纳米粒子表面带有甲基丙烯酰氧基基团，从而改善磁性纳米粒子与聚合物粒子的相容性。将表面改性的纳米粒子加入到以弱电解质引发剂2，2 '-偶氮二[N-（2-羧乙基）-2-2-甲基丙脒]（VA-057）为引发剂的无皂乳液聚合体系中，可以制备出亚微米级的复合粒子。

An efficient method to prepare monodisperse polymer particles incorporating functional nanoparticles such as magnetite nanoparticles was addressed. Using silane coupling reaction in diethylamine, which acts as both solvent and Lewis-basic catalyst, the surface of magnetite nanoparticles was modified by methacryloxypropyltrimethoxysilane to attach methacryloxy groups on the nanoparticles, and to improve their compatibility with polymer particles. Addition of the surface-modified nanoparticles into the polymerization system using soap-free emulsion polymerization with a weak electrolyte initiator, 2, 2'-azobis [N-(2carboxyethyl)-2-2-methylpropionamidine] (VA-057), was able to fabricate the submicron-sized composite particles.