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首页> 外文期刊>RSC Advances >Preparation of sponge-like porous SiO2 antireflective coatings with excellent environment-resistance by an acid-catalysed sol–gel method
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Preparation of sponge-like porous SiO2 antireflective coatings with excellent environment-resistance by an acid-catalysed sol–gel method

机译：酸催化溶胶-凝胶法制备耐环境性优良的海绵状多孔SiO 2 抗反射涂层

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摘要

Silica coatings with high-transmittance and good environment-resistance properties were prepared by an acid-catalyzed sol–gel method without template. Hexamethyldisilazane (HMDS) was added into an acid-catalyzed silica sol which acted not only as the catalyst but also as a blocking agent. The effect of different contents of HMDS has been investigated. The sponge-like silica coating was obtained when the weight ratio of HMDS to SiO2 was higher than 90%. The addition of HMDS enabled these silica antireflective coatings to possess excellent hydrophobicity properties. When the weight ratio of HMDS to SiO2 was 100%, the silica coating exhibited transmittance as high as 99.64% at a given wavelength and static water contact angle of 143.0°. After 48 hours of environment aging testing at 40%, 60% and 80% RH, these coatings showed a minute decrease upon maximum transmittance, from 99.64% to 99.56%, 99.49% and 99.38%, respectively. The sponge-like HMDS-containing coatings exhibited easy-to-clean properties, which would have great potential application in laser systems.
机译：通过无模板的酸催化溶胶-凝胶法制备了具有高透射率和良好的耐环境性能的二氧化硅涂料。将六甲基二硅氮烷（HMDS）添加到酸催化的硅溶胶中，该溶胶不仅起催化剂的作用，而且起保护剂的作用。已经研究了不同含量的HMDS的作用。当HMDS与SiO 2 的重量比大于90％时，得到海绵状二氧化硅涂层。 HMDS的添加使这些二氧化硅抗反射涂层具有优异的疏水性。当HMDS与SiO 2 的重量比为100％时，在给定波长和静态水接触角为143.0°的情况下，二氧化硅涂层的透射率高达99.64％。在40％，60％和80％RH下进行48小时的环境老化测试后，这些涂层的最大透射率出现微小的下降，分别从99.64％降至99.56％，99.49％和99.38％。含海绵状HMDS的涂料具有易于清洁的特性，在激光系统中具有巨大的潜在应用前景。

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