高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (11): 2136-2140.

• 研究论文 • 上一篇    下一篇

孔径可调的介孔SiO2自支持薄膜的溶剂挥发诱导自组装合成与表征

俞义轩, 刘建, 南海明, 刘茜, 蔡强, 李恒德   

  1. 清华大学材料科学与工程系, 北京 100084
  • 收稿日期:2010-03-24 出版日期:2010-11-10 发布日期:2010-11-10
  • 通讯作者: 蔡强, 男, 博士, 副研究员, 主要从事自组装化学研究. E-mail: caiqiang@mail.tsinghua.edu.cn
  • 基金资助:

    国家“八六三”计划项目(批准号: 041403311)资助.

Synthesis and Characteristic of Pore Size-tailored Self-supporting Mesoporous Film via Solvent Evaporation Induced Self-assembly

YU Yi-Xuan, LIU Jian, NAN Hai-Ming, LIU Xi, CAI Qiang*, LI Heng-De   

  1. Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
  • Received:2010-03-24 Online:2010-11-10 Published:2010-11-10
  • Contact: CAI Qiang. E-mail: caiqiang@mail.tsinghua.edu.cn
  • Supported by:

    国家“八六三”计划项目(批准号: 041403311)资助.

摘要: 以十六烷基三甲基溴化铵(CTAB)为模板剂, 正硅酸乙酯为硅源, 在弱酸性条件下利用溶剂挥发诱导自组装(EISA)合成出具有介孔结构的二氧化硅薄膜. 通过控制EISA过程中溶剂挥发的环境, 可在1.4~3.1 nm的范围内调节介孔结构的孔径. 实验表明, 较快的溶剂挥发速率有助于较大孔径的介孔结构生成. 用该方法合成的介孔薄膜具有蠕虫状孔道结构和良好的孔径均一性. 在外观上, 该薄膜具有均匀、透明和无缺陷等特点, 可以自支撑, 并且具有一定的韧性.

关键词: 介孔薄膜, 溶剂挥发诱导自组装, 孔径调节

Abstract: Mesoporous silica films with pore diameters of 1.7—3.1 nm were synthesized through evaporation induced self-assembly using CTAB as surfactant and TEOS as Si source in weak acid media. The films were flexible, self-supporting and centimeter-sized with wormhole-like channel systems. By controlling the solvent remove process, the pore size of films could be tailored without negative influence on the pore size uniformity. A fast volatilization speed would lead to a large pore size, while a slow volatilization speed would result in a small pore size.

Key words: Mesoporous film, Solvent evaporation induced self-assembly, Pore size tailoring