Development of highly tough gel containing ionic liquid using structure controlled polymer by precision polymerization

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H01691
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 27010:Transport phenomena and unit operations-related
• Research Institution: Kobe University
• Principal Investigator: Kamio Eiji 神戸大学, 工学研究科, 准教授 (30382237)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: ゲル / イオン液体 / 高強度ゲル / ダブルネットワーク / CO2分離膜

Outline of Final Research Achievements

The purpose of this study is to elucidate the toughening mechanism of inorganic/organic double network (DN) ion gels containing a large amount of an ionic liquid. In addition, based on the toughening mechanism, further increase of the toughness of the DN ion gel was performed. DN ion gels with a well-designed organic network synthesized by living radical polymerization were prepared and their mechanical properties were evaluated. In addition, based on the classical rubber elasticity theory, the toughening mechanism was theoretically investigated, and the role of the organic network of the inorganic/organic double-network on the toughening mechanism was clarified. Furthermore, a novel DN ion gel was fabricated, the DN ion-gel thin membrane was fabricated, and the highly selective and fast CO2 permeation performance was demonstrated.

Free Research Field

膜工学、分離工学、材料化学

Academic Significance and Societal Importance of the Research Achievements

無機ネットワークと有機ネットワークが絡まり合ったダブルネットワーク（DN）内にCO2を選択的に溶解するイオン液体を大量に含有する高強度DNイオンゲルについて、その高強度発現に寄与する有機ネットワークの構造と役割を、実験と古典的ゴム弾性理論に基づき解明した。DNイオンゲルの強度発現に関する原理原則の理解は、高イオン液体含有率のゲル薄膜の創製に繋がる学術的意義の大きい成果である。また、得られた知見に基づき創製された高速且つ高選択的CO2分離が可能なイオンゲル薄膜は、地球温暖化の抑制に貢献可能なCO2分離材料であり、社会的意義が大きい成果である。