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微结构与表面修饰对二氧化硅多孔薄膜疏水性能的影响

许莉丽 ,  李晓光 ,  倪星元 ,  沈军

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引用本文: 许莉丽, 李晓光, 倪星元, 沈军. 微结构与表面修饰对二氧化硅多孔薄膜疏水性能的影响[J]. 无机化学学报, 2013, 29(3): 449-454. doi: 10.3969/j.issn.1001-4861.2013.00.089 shu
Citation:  XU Li-Li, LI Xiao-Guang, NI Xing-Yuan, SHEN Jun. Micro-Structure and Surface Modification of Porous Silica Coating and Their Effects on Hydrophobicity[J]. Chinese Journal of Inorganic Chemistry, 2013, 29(3): 449-454. doi: 10.3969/j.issn.1001-4861.2013.00.089 shu

微结构与表面修饰对二氧化硅多孔薄膜疏水性能的影响

  • 基金项目:

    国家自然科学基金(No.11074189) (No.11074189)

    上海市科委纳米专项(No.11nm0501600)资助项目。 (No.11nm0501600)

摘要: 通过引入聚乙二醇(PEG)改性传统二氧化硅(SiO2)溶胶,得到了粒径分布较宽且粒径可控的溶胶。比较了六甲基二硅氮烷(HMDS)溶胶内修饰和薄膜表面修饰以及溶胶粒径对SiO2薄膜疏水性能的影响。采用动态光散射粒度仪定量测试了二氧化硅溶胶老化过程中粒度的变化,用原子力显微镜、接触角测试仪、红外光谱仪、紫外-可见-近红外分光光度计分别对薄膜的表面形貌、表观静态接触角、薄膜成分及透光率等进行了测量。结果表明:PEG的添加可有效增大溶胶粒度从而增大薄膜的粗糙度,提高薄膜的疏水性。表面修饰效果受修饰方式和SiO2粒径影响,粒径较小时有利于溶胶内修饰,粒径较大时有利于对薄膜修饰。经过表面修饰剂(HMDS)的气氛处理得到了接触角为152°的超疏水薄膜,而且相比溶胶内修饰可以减小薄膜透光率的损失。

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  • 收稿日期:  2012-09-14
  • 网络出版日期:  2012-11-13
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