大学化学 >> 2022, Vol. 37 >> Issue (5): 2203002.doi: 10.3866/PKU.DXHX202203002

所属专题： 第2届全国大学生化学实验创新设计竞赛

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自愈合离子凝胶的制备及传感测试

刘婧怡, 蒋雅萌, 冯伟, 郑凤(), 许新华()   

  • 收稿日期:2022-03-01 录用日期:2022-03-03 发布日期:2022-04-11
  • 通讯作者: 郑凤,许新华 E-mail:fzheng@tongji.edu.cn;xxh01@tongji.edu.cn
  • 作者简介:Email: xxh01@tongji.edu.cn (许新华)
    Email: fzheng@tongji.edu.cn (郑凤)

Preparation and Sensing Test of Self-Healing Ionic Gel

Jingyi Liu, Yameng Jiang, Wei Feng, Feng Zheng(), Xinhua Xu()   

  • Received:2022-03-01 Accepted:2022-03-03 Published:2022-04-11
  • Contact: Feng Zheng,Xinhua Xu E-mail:fzheng@tongji.edu.cn;xxh01@tongji.edu.cn

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摘要：

制备可自愈合离子凝胶及测试其应变和湿度感应，可用作本科新生的普通化学实验，经拓展内容后也适用于应用化学、高分子化学和材料科学与工程等相关专业本科生的综合实验。实验采用自由基聚合法将1-乙烯基-3-丁基咪唑四氟硼酸盐([VBIm][BF4])制备成交联聚合物凝胶(PIL)，1-丁基-3-甲基咪唑四氟硼酸盐([BMIm][BF4]，IL)充盈其中作为溶剂和添加剂。该PIL/IL离子凝胶中存在游离态的离子液体，具有良好的导电性，可对应变和湿度变化产生响应；同时，因具有较强离子键相互作用，该离子凝胶具有自愈合能力，可重复使用。

关键词: 离子凝胶, 自愈合, 应变传感, 湿度传感

Abstract:

Self-healing ionic gel was prepared and its strain and humidity sensing test were performed. It is designed as a laboratory experiment for general chemistry of first-year undergraduates. After content expanding, the experiment can also be used as a comprehensive experiment for the students majored in applied chemistry, polymer chemistry and materials science and engineering. The ionic gel was prepared by free radical polymerization of vinyl-3-butyl imidazolium tetrafluoroborate ([VBIm][BF4]) to form cross-linked polymer matrix (PIL). Whereas 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIm][BF4]) (IL) was behaved as solvent and additive to the PIL. Because of the existence of free ionic liquid IL molecules in the gel, the PIL/IL ionic gel had a good electrical conductivity, which caused an excellent response to the strain by force or the humidity in air. The gel was also self-healable due to the strong ionic bonding interaction.

Key words: Ionic gel, Self-healing, Strain sensing, Humidity sensing