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采用溶胶-凝胶技术,通过酸/酸二步法控制实验条件,由于表面活性剂具有特殊的表面活性性能,实验中采用表面活性剂十六烷基三甲基溴化氨(CTAB)为模板剂,正硅酸乙酯为硅源,甲基三乙氧基硅烷为有机硅烷,以及二次去离子水,盐酸为催化剂等原料制备SiO2-MTES(摩尔比1:1.15)前驱体溶胶.通过简单提拉迅速蒸发溶剂等方法制备二氧化硅-甲基三乙氧基硅烷的有机-无机复合薄膜,测得的红外透射光谱表明所制备的薄膜由于掺入甲基基团而疏水,接触角测试值约125度,其结果进一步支持这一结论.未加MTES的薄膜折射率为1.18,膜厚305nm.加入MTES后薄膜折射率为1.22,膜厚为289.6nm.透射光谱和机械性能测试结果表明所制备的疏水型纳米SiO2-MTES复合薄膜同时还具有良好的光学性能和机械性能.

参考文献

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