基于动态溶胀法制备中空聚合物微球  

Synthesis of hollow polymer microspheres by dynamic swelling method

作　　者：段涛[1] 张力[1] 聂冬梅[1,2] 杨波[1] 姬彦玲[1] 唐永建[1,2] 

机构地区：[1]西南科技大学极端条件物质特性实验室,四川绵阳621010 [2]中国工程物理研究院激光聚变中心,四川绵阳621900

出　　处：《强激光与粒子束》2012年第2期361-364,共4页High Power Laser and Particle Beams

基　　金：四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地开放基金项目(10zxfk33)

摘　　要：以表面带正电荷的μm级聚苯乙烯微球为种子,经过甲苯、二乙烯基苯溶胀,聚合与包覆等过程制备了直径约5μm的中空聚合物微球。研究了溶剂类型、溶剂用量对动态溶胀法制备的中空聚合物微球粒径、分布和结构的影响,讨论了中空聚合物微球的形成机理。结果表明:添加一定量甲苯、二甲苯等挥发性溶剂是动态溶胀法形成中空聚合物微球的前提;甲苯用量越多,溶胀后形成的中空结构越明显,孔径越大;选择低溶解性的二甲苯溶剂更有利于中空结构的形成。Hollow polymer microspheres about 5 μm in diameter were synthesized by dynamic swelling method using micron- sized polystyrene spheres with positive charges on surfaces as seeds. The synthesis process included swelling by organic solvents such as toluene and divinylbenzene, polymerizing and coating. The influences of variety and dosage of organic solvents on diameter, size distribution and hole structure of hollow microspheres were investigated, and the formation mechanism of hollow microspheres was discussed. It is indicated that some volatile organic solvents, such as toluene and dimethylbenzene, are crucial to hollow structure formation. Experimental results show that, more toluene leads to larger hollow structure after swelling, and dimethylbenzene is good for hollow structure formation, owing to its low solubility.

关 键 词：中空微球 动态溶胀法 分散聚合 核壳结构 形成机理 

分 类 号：TQ316[化学工程—高聚物工业]