| 溶剂型有机硅改性硅溶胶的合成与性能研究 |
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| 引用本文： | 何岩,郝博,李国军,黎春阳,赵秀娟. 溶剂型有机硅改性硅溶胶的合成与性能研究[J]. 有机硅材料, 2014, 0(3): 149-152 |
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| 作者姓名： | 何岩 郝博 李国军 黎春阳 赵秀娟 |
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| 作者单位： | [1]大连交通大学,辽宁大连116028; [2]长春轨道通客车股份有限公司,吉林长春130062 |
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| 基金项目： | 辽宁省计划项目（2011223009）和辽宁省高等学校优秀人才支持计划（LR2011010）资助项目. |
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| 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6 H、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℃。
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| 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 |
Synthesis and Properties of Solvent Silicone-modified Silica Sol |
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| Affiliation: | HE Yan, HAO Bo, LI Guo-jun, LI Chun-yang, ZHAO Xiu-juan ( 1. Dalian Jiaotong University, Dalian 116028, Liaoning; 2. Changchun Railway Vehicles Co. , Ltd. , Changchun 130062, Jilin) |
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| Abstract: | 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 ℃. |
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| Keywords: | alkaline silica sol methyltrimethoxysilane diphenyldimethoxysilane paint |
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