以自合成的平均粒径为95.7 nm、粒径分布指数为0.047的聚苯乙烯乳胶粒为种子,采用种子乳液聚合方法制备出单分散的聚苯乙烯乳胶粒,探讨了控制胶粒粒径大小及分布的方法及制备条件.结果表明,在种子乳液聚合中,通过控制单体加入量和乳化剂的补加速度,可以得到单分散聚苯乙烯乳胶粒;当没有新的胶束生成且乳胶粒子没有发生聚结时,乳胶粒尺寸和分布有自身变窄的倾向,得到了平均粒径为261.6 nm、粒径分布指数为0.021的单分散乳胶粒.采用毛细管作用力驱动的微粒自组装技术进行单分散胶粒的组装,获得了二维有序聚苯乙烯胶体晶体,并用场发射扫描电子显微镜表征了其二维有序结构.
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