文献类型：期刊文献

中文题名：甲基丙烯酸甲酯对纳米SiO_2的表面接枝聚合改性研究

英文题名：Surface grafting modification of nano-SiO_2 by polymerization of methylmethacrylate

作者：王伟山[1];易红玲[1];郑柏存[1,2];傅乐峰[2]

机构：[1]华东理工大学体育新材料研发中心,上海200237;[2]上海三瑞化学有限公司,上海200237

年份：2009

卷号：37

期号：9

起止页码：83

中文期刊名：化工新型材料

外文期刊名：New Chemical Materials

收录：北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：纳米SiO2;硅烷偶联剂;甲基丙烯酸甲酯;表面接枝

外文关键词：nano-silica, silane coupling agent, methylmethacrylate, surface grafting

摘要：将经过硅烷化处理的偶联剂-γMPS接枝到纳米SiO2表面,然后在引发剂AIBN的作用下引发单体MMA发生自由基聚合包覆。利用FTIR、TG、CA(接触角)以及TEM等手段分别表征了改性工艺条件对粒子改性前后化学组成结构、接枝率、表面亲水性以及形貌等的影响。系统研究了单体用量、引发剂用量以及反应时间对SiO2/γ-MPS/PM-MA纳米复合粒子接枝改性效果的影响。结果表明,经过PMMA接枝包覆制得了高接枝率的复合粒子,并大大改善了纳米粒子的分散性。
The silane coupling agent after silanation treatment was used to introduce polymerizable groups onto the surface of nano-SiO2, and then the particles were encapsulated with free radical polymerization of methylmethacrylate initiated by AIBN. The influence of modification conditions on the chemical composition structure, grafting efficiency, surface hydrophilicity and morphology was characterized by FTIR, TG, CA and TEM. The influence of initiator amount, mono- mer amount and reaction time on the modification of SiO2/γ-MPS/PMMA nano composite particle was investigated systematically. The results confirmed that after grafting composite particles with high grafting efficiency were obtained, and the dispersion of nano-particles were greatly improved.