摇床法制备单分散多孔聚苯乙烯微球的研究

Preparation of Monodisperse Porous Polystyrene Microspheres By Shaker Method

采用摇床法,以聚乙烯吡咯烷酮为分散剂,水及无水乙醇为反应介质,偶氮二异丁腈为引发剂,通过分散聚合制备出单分散聚苯乙烯微球,并通过两步溶胀法制备出多孔聚合物微球。对影响微球粒径、单分散性及其形貌的因素进行研究,结果显示,采用简单的摇床法可以实现单分散聚苯乙烯微球的批量、可控制备;微球粒径可控制在2~3μm,并具有良好的单分散性和球形形貌结构;通过两步溶胀法制备的微球可观察到明显的孔隙结构。

In this paper,the shaker method,with polyvinylpyrrolidone as dispersant,water and absolute ethanol as reaction medium,azo diisobutyronitrile initiator,by dispersing polymerization to prepare monodisperse polystyrene microspheres,and through a two-step swelling method were used to prepare porous polymer microspheres.The factors affecting the particle size,monodispersity and morphology of microspheres were studied.The results show that the batch preparation of monodisperse polystyrene microspheres can be achieved by simple shaker method.The particle size of the microspheres can be controlled at 2~3μm,and the microspheres have good monodispersity and spherical morphology.Obvious pore structure was observed in the microspheres prepared by two-step swelling method.