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中文摘要：
以乙烯基三乙氧基硅烷(VTES)为先驱体,无水乙醇(EtOH)作溶剂,采用Sol-Gel酸碱两步法常压制备疏水SiO2气凝胶材料。使用X射线衍射仪、傅立叶红外光谱仪对SiO2气凝胶的结构进行表征,并通过视频光学接触角测定仪测出气凝胶对水的接触角范围为115°～150°,呈现好的疏水性能。同时研究表明,不同EtOH/VTES摩尔比以及不同酸、碱催化剂浓度对气凝胶的体积收缩率、体密度有较大影响。试验所获得的样品体密度大致分布在0.13～0.43g/cm3范围,体积收缩率分布在20%～70%之间。
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