溶剂型有机硅改性硅溶胶的合成与性能研究  

Synthesis and Properties of Solvent Silicone-modified Silica Sol

作　　者：何岩[1] 郝博[2] 李国军[1] 黎春阳[1] 赵秀娟[1] 

机构地区：[1]大连交通大学,辽宁大连116028 [2]长春轨道客车股份有限公司,吉林长春130062

出　　处：《有机硅材料》2014年第3期149-152,共4页Silicone Material

基　　金：辽宁省计划项目(2011223009);辽宁省高等学校优秀人才支持计划(LR2011010)资助项目

摘　　要：以碱性硅溶胶、甲基三甲氧基硅烷和二苯基二甲氧基硅烷为主要原料，二乙二醇丁醚为溶剂，通过水解-缩聚反应，制得溶剂型有机硅改性硅溶胶。研究了硅溶胶的pH值、中和用酸的种类、 R／Si值以及有机硅单体总质量对有机硅改性硅溶胶性能的影响。结果表明，最佳工艺为：用HNO3调节硅溶胶的pH值至4.3～4.5之间、 R／Si值为1.25～1.30、有机硅单体的总质量110～120 g （硅溶胶的质量为100 g），在此条件下得到的有机硅改性硅溶胶外观为胶体，成膜性好，其膜的硬度大于6H、附着力为1级。红外光谱分析表明，有机硅很好地包裹在二氧化硅表面； TG-DSC结果表明，有机硅改性硅溶胶的耐热温度达500℃。A solvent silicone-modified silica sol was synthesized with alkaline silica sol , methyltrimethox-ysilane and diphenyldimethoxysilane as the raw materials , diethylene glycol butyl ether as the solvent by hy-drolysis/condensation .The influence of pH value of silica sol , types of neutralizing acids , R/Si value and the total amount of silicone monomer on the properties of the silicone-modified silica sol was studied .Results show that the optimal preparation is keeping pH value of HNO 3 between 4.3~4.5 , R/Si value of 1.25~1.30 and the weight ratio of silicone monomer and silica sol at 1.1~1.2∶1.0 .The obtained silica sol is colloidal , and affords good film with pencil hardness 〉6H, and adhesion of class 1.IR analysis suggests that nano-meter SiO2 was coated by silicone .The analysis of TG-DSC indicates that the obtained samples exhibit good heat resistance up to 500 ℃.

关 键 词：碱性 硅溶胶 甲基三甲氧基硅烷 二苯基二甲氧基硅烷 涂料 

分 类 号：TQ264.1[化学工程—有机化工]