自组装法制备SiO_2-PMBAAm-PAM复合微球及其水化膨胀性能研究  

Preparation of SiO2-PMBAAm-PAM composite materials by self-assembly method and study of the hydration expansion properties

作　　者：曹孟菁[1] 朱维耀[1] 蔡强[2] 刘天奇[2] 韩宏彦[1] 张雪龄[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]清华大学材料科学与工程学院,北京100084

出　　处：《功能材料》2015年第11期11011-11016,共6页Journal of Functional Materials

基　　金：国家自然基金资助项目(11372033;50934003);教育部基金资助项目(FRF-MP-B12006B)

摘　　要：首先在stber方法的基础上制备出了尺寸均一的单分散的SiO2微球。在乙腈溶剂中,采用NN’-亚甲基双丙烯酰胺(MBAAm)和丙烯酰胺(AM)作为聚合物单体,通过自组装技术成功制备出了较规则球形且粒径分布集中的SiO2-PMBAAm-PAM核壳结构聚合物复合微球,并对其制备条件进行了系统优化。将优化制备出的复合微球进行了水化膨胀性能测试。测试结果表明,随着矿化度增大,复合微球的膨胀倍率减小;随着pH值增大,复合微球的膨胀倍率呈现先增大后减小的趋势,且在中性环境中膨胀性能最好。Monodisperse silica-PMBAAm-PAM core-shell composite materials with silica as core and PMBAAm-PAM as shell were prepared by self-assembly method,in which the silica core with diameter of 310 nm was synthesized in the first stage according to stber method.The PMBAAm-PAM shell was then encapsulated over the silica core by distillation-precipitation polymerizationof MBAAm and AM in neat acetonitrile with AIBN as initiator.The optimal shell thickness of the core-shell composite particle was controlled via altering the mass ratio of MBAA monomer to AM monomer and the mass of MBAAM and AM during the polymerization.At last,the optimal shell thickness of the core-shell composite particle was studied by Hydration expansion properties.

关 键 词：SiO2-PMBAAm-PAM 壳核结构 水化膨胀 自组装 

分 类 号：TE39[石油与天然气工程—油气田开发工程]