Development of Soft Material Using Ionic Liquids

在这项研究中，系统地探索了由聚合物和离子液体组成的创新软材料。为了获得有关软材料的基本信息，研究了聚合物在离子液体中的溶解度和相行为，揭示了除了库仑相互作用外，范德华、氢键和阳离子-PAI相互作用对决定因素的重要性。利用具有较高和/或较低临界溶液温度的嵌段组成的不同嵌段共聚物，实现了热致溶胶凝胶相变、纳米凝胶在水相和离子液体相之间的穿梭以及单体和胶束之间的光致相变。此外，以磺化聚酰亚胺为基质聚合物，制备了离子液体复合膜，并成功地用于环境耐久的离子致动器和非加湿中温燃料电池。

In this study, innovative soft materials consisting of polymers and ionic liquids have been systematically explored. In order to obtain fundamental information on the soft materials, solubility and phase behavior of polymers in ionic liquids were studied and revealed the importance of van der Waals, hydrogen bonding and cation-pai interactions in addition to Coulombic interaction for the decisive factors. By using different block copolymers consisting of the segments having upper critical and/or lower critical solution temperatures, thermally induced sol-gel transition, nano-gel shuttling between water phase and ionic liquid phase, and photo-induced phase transition between unimer and micelle were realized. Furthermore, by using sulfonated polymides as matrix polymer, composite membranes with ionic liquids were fabricated and were successfully demonstrated to be useful for environmentally durable ionic actuators and non-humidified intermediate temperature fuel cells.