Preparation of monodisperse polymer particles incorporating functional nanoparticles

介绍了一种有效的制备单分散聚合物粒子的方法，其中包括磁铁纳米粒子等功能纳米粒子。利用二乙胺中的硅烷偶联反应，同时作为溶剂和Lewis碱催化剂，用甲基丙烯氧丙基三甲氧基硅烷对磁性纳米粒子进行表面修饰，将甲基丙烯氧基连接到纳米磁性粒子上，提高了磁性纳米粒子与聚合物粒子的相容性。在弱电解质引发剂2，2‘-偶氮二[N-(2-羧乙基)-2-2-甲基丙酰胺](VA-057)的无皂乳液聚合体系中加入表面修饰后的纳米粒子，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.