基于PMMA-SiO2含染料离子凝胶薄膜光功能材料的制备和性能研究

Ionogels are a class of functional hybrid materials, which enable the development of solid devices combining the properties of the IL (e.g. ionic conductivity or thermal stability) and those of a host (e.g. transparency or mechanical stability). The exploration of new functional ionogels has been one of the major driving forces of its research. In our preliminary research, a series of magnetic and luminescent ionogels have been fabricated using PMMA as a support. On the basis of the preliminary work, we will develop highly soluble dye-ionic liquids based active components with a PMMA-SiO2 matrix that yields transparent, flexible, ion conducting and environmentally responsive thin film materials. The reversibly respond to changes in proton concentration in aqueous or no-aqueous solution will be tested. The structure-activity relationship of thin film will be revealed. The resulting material will be thus a prototype of soft functional materials that could be used in environmental sensing or in optical data storage.

离子凝胶材料集合了离子液体自身的化学、热稳定性和优良导电性以及固体材料的机械稳定性，是一类新型功能杂化材料。功能离子凝胶的开发已经成为该领域研究的热点。我们已经发展了系列基于PMMA的磁性和发光离子凝胶。在前期工作的基础上，本项目旨在以PMMA-SiO2杂化多孔材料作为固态基体，染料基离子液体为活性组分，制备具有一定硬度和柔性的透明、导电以及环境响应的离子凝胶薄膜材料。研究离子凝胶材料在水和非水溶液中的质子响应性能，研究薄膜材料的结构和性能的关系，为其在环境传感材料和光学数据存储的应用提供蓝本。

透明发光离子凝胶薄膜材料具有机械强度高、热稳定性好、高电导率等优点而备受人们关注。本项目充分利用PMMA-SiO2有机-无机杂化固态基体的灵活加工性、离子液体的导电性、染料和碳点的光学响应特性，组装了离子凝胶光功能薄膜材料。通过调节有机和无机组分，组合不同染料离子液体1-丁基-3-甲基咪唑对二甲氨基苯基偶氮苯磺酸盐（[Bmim][MO]）和1-丁基-3-甲基咪唑邻甲酚磺酰酞盐[Bmim][CR]），实现了具有优良机械性能、透明、形状记忆的离子凝胶传感材料的合成，其在较宽pH范围内可检测无机酸/碱或有机酸/碱环境中的酸碱浓度。我们还利用胶状可溶性碳量子点作为发光源，制备了有机硅修饰的发光碳量子点基离子凝胶材料，拓展了项目中提出的有机-无机杂化离子凝胶材料的应用范围。