文献类型：期刊文献

中文题名：超细聚甲基硅氧烷微球的制备

英文题名：Synthesis of the Polymethylsiloxane Microspheres in Micron Size

作者：魏鹏[1];辛忠[1];陆馨[1]

机构：[1]华东理工大学化工学院联合化学反应工程研究所国家重点反应工程实验室,上海200237

年份：2005

卷号：18

期号：4

起止页码：682

中文期刊名：功能高分子学报

外文期刊名：Journal of Functional Polymers

收录：CSTPCD;;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：上海市纳米科技与产业发展促进中心资助课题(0352nm078)

语种：中文

中文关键词：超细聚硅氧烷微球;甲基三甲氧基硅烷;水解

外文关键词：super fine polysiloxane microspheres; MTMS （methyltrimethoxysilane） ; hydrolysis

摘要：采用水解-缩聚两步法以甲基三甲氧基硅烷(MTMS)为原料制备微米级聚甲基硅氧烷微球,粒径为1～15μm,粒径分布较窄;就反应体系pH值、油水比等条件对微球粒径大小、形态及其分布的影响进行了研究.结果表明,较优的反应条件为:在水解过程应控制pH=4.0～6.0之间,投料油水比(MTMS与水的摩尔比)应小于1/4,缩聚过程控制pH=7.0～9.0之间;随着油水比的增大以及缩聚反应中pH值的降低,微球的粒径增大,分布变宽.
Polysiloxane microspheres were prepared by the sol-gel polymerization method from methyltrimethoxysilane （MTMS）. The particle size is from 1μm to 15μm and the size distribution is narrow （C. V. ）. Effects of the reaction parameters, such as pH value and the ratio of oil to water on particle size, shape and distribution were investigated. The results indicate that the preferred preparation conditions are pH value in 4.0-6.0, ratio of O/W 〈1/4 in hydrolysis reaction and pH value in 7.0-9.0 for condensation reaction. With the increasing of O/W ratio and the decreasing of pH value in condensation reaction, the particle size is increase and the size distribution broadens.