Abstract:

Transparent hydrophobic methyltrimethoxysilane(MTMS)/Si-sol/hydroxypropyl acrylate coatings was prepared in order to improve the hydrophobicity of glass surface.Effects of the hydrolysis temperature of MTMS, the pH value of hydrolization solution, the reaction time of MTMS with Si-sol, and the MTMS content on the hydrophobicity of the coatings were discussed respectively.The type and amount of functional groups on the coating’s surface as well as the microstructure were characterized by Fourier transform infrared spectroscopy(FTIR)and atomic force microscope.The coatings with the best hydrophobicity was found when prepared with the following conditions: the MTMS was hydrolyzed in 40℃, pH=3, and the volume ratio of the hydrolyzed MTMS and Si-sol was 0.1, the reaction time was 2 h and the reaction temperature was 60℃.

Key words:

甲基三甲氧基硅烷, 硅溶胶, 涂膜, 憎水性

摘要：

制备了用于增强玻璃表面憎水性的甲基三甲氧基硅烷（MTMS）/硅溶胶/丙烯酸羟丙酯透明薄膜。讨论了MTMS的水解温度、pH值、MTMS与硅溶胶的反应时间、MTMS用量与薄膜憎水性的关系。采用红外光谱和原子力显微镜表征了涂膜表面的官能团种类、数量和微观结构。研究表明，将MTMS在40℃、pH=3的条件下水解，再与酸性硅溶胶的体积比（r）为0.1，在60℃下反应2 h，所得的产物制备的涂膜的憎水性最好，水接触角可达127°。

关键词:

甲基三甲氧基硅烷, 硅溶胶, 涂膜, 憎水性