摘要
采用PDMS-SiO2-TiO2体系，合成了适用于浸涂工艺的稳定涂液。以红外光谱分析了不同热处理温度下涂层的结构，研究了聚合物的含量和工艺条件对涂层耐碱性能的影响。结果表明：溶胶液可以在较长时间内保持稳定；当PDMS／（Ti＋Si）质量比为1：3、拉膜速度为60mm／min、热处理温度为250℃、溶胶溶液浓度为0．6mol／L时，涂层能抵抗60℃ 1mol／L NaOH侵蚀1天和在80℃饱和Ca（OH）2液中至少6天的加速侵蚀，显示出较好的耐碱性。
A stable sol suitable for dipping process was synthesized in the system of PDMS-SiO2-TiO2. The structure of coatings formed at different temperatures was detected by infrared spectra, and the effect of PDMS content and preparing parameters on alkaline resistance of coatings was studied. The results showed that the viscosity of sols can be almost unchanged during a long time, which is beneficial to dipping process. When the weight ratio of PDMS to （Ti ＋ Si） is 1： 3, the withdrawal speed is 60mm/min and the concentration of the sols is 0.6mol/L, such new hybrid coatings can efficiently prevent glass from a attack of 1mol/L NaOH at 60℃ for 1 day and a attack of concentrated Ca（OH）2 at 80℃ for 6 days, from which the good alkali durability of these coatings is confirmed.
基金
上海市科委基础研究重点项目（04JC14030）资助.
