基于咪唑盐的杂化阴离子交换膜的结构设计及性能研究

项目名称： 基于咪唑盐的杂化阴离子交换膜的结构设计及性能研究

项目编号： No.51303017

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 林本才

作者单位： 常州大学

项目金额： 25万元

中文摘要： 阴离子交换膜(AEM)是碱性直接甲醇燃料电池(AEMDMFCs)的核心部件，然而应用最多的季铵盐类阴离子交换膜存在高温耐碱性差、机械强度低及尺寸稳定性差等问题。在有机膜中引入无机材料可以提高其机械性能和尺寸稳定性，但是受到无机材料和聚合物间相容性的限制。针对这些问题，本申请项目将制备基于咪唑盐的有机-无机杂化阴离子交换膜。我们拟设计合成新型咪唑盐，通过分子模拟和实验验证相结合的手段研究咪唑盐分子结构与其耐碱性的关系，通过引入取代基团提高咪唑盐的耐碱性。将优选的咪唑盐进行功能化修饰，解决聚合物和无机材料相容性差的难题，通过溶胶-凝胶、掺杂法等制备基于咪唑盐的杂化阴离子交换膜，并系统研究杂化阴离子交换膜的各项性能。我们期望通过该课题的实施，为提高咪唑盐的耐碱性、提高无机材料和聚合物的相容性提供新的方法，为新型杂化阴离子交换膜的制备提供理论和实践基础。

中文关键词： 燃料电池；阴离子交换膜；耐碱性；咪唑盐；

英文摘要： The anion exchange membrane (AEM) is one of the key components of alkaline anion exchange membrane direct methanol fuel cells (AEMDMFCs). However, the most commonly used quaternary ammonium-based AEMs are generally sensitive towards β-hydrogen (Hofmann) elimination and direct nucleophilic substitution under high pH environment at elevated temperature. In addition, the fragile mechanical property and poor dimensional stability of the quaternary ammonium-based AEMs limit their practical application in AEMDMFCs applications. The performance of AEMs could be enhanced by incorporating inorganic materials. But, the inorganic materials used has low compatibility with the polymeric matrix. Hence, there is an urgent need for AEMDMFCs to explore new AEMs with good performance. Imidazolium-based organic-inorganic hybrid AEMs were prepared in this proposal. The influence of molecular structure on the alkaline stability of imidazolium salts will be systematically studied both by computer molecular simulation and experimental verification, and new structure of imidazolium salts with enhanced alkaline stability were designed and synthesized by the feedback. Imidazolium-based organic-inorganic hybrid AEMs were prepared via doping method or sol-gel method. The properties of the imidazolium-based AEMs, such as water uptake, swell

英文关键词： Fuel cell；Anion exchange membrane；Alkaline stability；Imidazolium salts；