【摘要】 利用原子力显微镜(AFM)对聚丙烯酸纳米微凝胶的形态、结构进行了表征,单体浓度、交联剂与单体摩尔比对聚丙烯酸微凝胶的粒径都有一定影响,在实验条件下均可得到粒径为20~60 nm的微凝胶。加入夺氢型光引发剂BP-4进行二次聚合,可以得到大分子纳米凝胶引发剂,其粒径比一次聚合所得微凝胶增大10~20 nm;二次聚合时加入N-异丙基丙烯酰胺(NIPAM)可得到50~90 nm、表面包覆PNIPAM的纳米凝胶。更多还原

【Abstract】 The morphology of polyacrylic acid nanogels was characterized by atomic force microscopy and nanogels with particle size of 20～60?nm were observed under conditions studied.The monomer concentration and the cross-linker concentration had influences on the microstructure and particle size of polyacrylic acid nanogels.The nanogels with a reinitiating ability and its particle size bigger than before were obtained through further polymerization initiated by benzophenone derivant BP-4.Also,the PAA-g-PNIPAM nanogels with particle size of 50～90?nm were prepared by further graft polymerization.更多还原