双功能离子液晶电解质的设计合成及电致变色应用

Electrochromic materials have aroused great interest for the application in technologies such as display and smart windows. Rapid response speed and high stability are two important performance indexes urging the extensive application for the electrochromic conjugated polymers. In this project, a series of main-chain and suspended chain ionic liquid crystal electrolytes based on pyridine-EDOT units are designed and synthesized. Such materials contain both the electrochemical feature of ionic liquid and micro-ordered structure of liquid crystal, which can provide transport pathways for doping ions (or electron) and possess the ability of keeping charge balance, which are favor of the fast switching time of electrochromic materials and devices. On the basis of these, the structures of ionic liquid crystals are optimized, and the electrochromic devices based on them are constructed and studied, the effects of aggregation state of electrolyte, charge transmission rate and interfacial microstructure of the devices on the electrochromic performance will be investigated in details, which will lay a theoretical and practical foundation for the preparation of electrochromic materials and devices with rapid response speed and long time stability.

电致变色材料因在显示器、智能窗等领域具有良好的应用前景而吸引了研究者们极大的兴趣。制备出具有快传输、高稳定的电解质材料和器件是推进其商业化应用的关键所在。本项目拟设计合成一系列以吡啶-EDOT衍生物为基元的主链和支链型离子液晶电解质。该类电解质材料将离子液体的电化学特性和液晶的微观有序结构整合起来，既能为掺杂离子或电子提供传输通道，又兼具电荷存储的能力，有利于实现器件的快速响应。在此基础上，通过优选离子液晶电解质来构建电致变色器件。探究电解质有序聚集态结构、电荷传输速率、器件界面微结构与电致变色性能之间的内在关联，为快速响应，高循环稳定性聚合物基电致变色器件的制备提供理论和实验基础。

多色快速响应型电致变色材料及器件在显示器、电子纸、智能窗及军事伪装等领域具有潜在的应用前景。本项目围绕多功能离子液晶电解质的合成及电致变色器件的组装为主要研究内容开展相关工作，取得进展主要包括：（1）设计合成了基于吡啶噻吩衍生物双功能电解质，探索了不同活性官能基团、溶剂和支持电解质对电化学性能及变色性能的影响，制备了相应的器件，对器件的变色性能进行了研究。（2）设计合成了六种基于咔唑、三苯胺和噻吩衍生物的共轭微孔聚合物薄膜，探讨了聚合物薄膜微观形貌结构与快速响应性质之间的内在关联。（3）制备了黑色显示的共聚物薄膜，研究了共聚条件对黑色显示的影响，为全色显示电致变色器件的开发提供基础。本项目在多功能电解质及高性能聚合物变色材料的设计、合成方面积累了些许的实验数据，有望为多色快速响应型电致变色器件的设计制备提供一定的理论和材料基础。