Phase separation microscopic structures of ionic liquid+ionic liquid mixtures

• Project/Area Number: 18K14039
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 27010:Transport phenomena and unit operations-related
• Research Institution: Muroran Institute of Technology
• Principal Investigator: Shimomura Takuya 室蘭工業大学, 大学院工学研究科, 助教 (90639478)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2020: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: イオン液体+イオン液体混合物 / 相分離挙動 / 相分離 / 小角中性子散乱

Outline of Final Research Achievements

Effects of cation structure and common anion on phase separation of ionic liquid + ionic liquid (IL+IL) mixtures with a common anion were investigated. All of the IL+IL mixtures with a common anion investigated cause phase separation by cooling. The phase separation temperatures of IL+IL mixtures were higher as the difference of hydrophobicity of two cations are larger. On the other hand, the phase separation temperatures of the mixtures drastically increased with increasing the hydrophilicity of a common anion.

Academic Significance and Societal Importance of the Research Achievements

分子性液体+分子性液体混合物や、分子性液体+イオン液体混合物の相分離挙動については数多くの報告例があるが、イオン液体+イオン液体混合物の相分離挙動についてはほとんど報告例がなかった。本研究課題で得られた成果から、ほとんど基礎的知見がなかったイオン液体+イオン液体混合物の相分離挙動に関する貴重な情報を得ることができた。

Research Products

• [Presentation] Transport properties of imidazolium-based ionic liquid+2-propanol mixtures (2019)
  • Author(s): T. Shimomura, Y. Kohno, M. Kanakubo
  • Organizer: Asian Pacific Confederation of Chemical Engineering congress (APCChE2019)
  • Int'l Joint Research
• [Presentation] イオン液体+イオン液体混合物の相分離挙動におよぼすカチオン構造の効果 (2019)
  • Author(s): 村山大雅、下村拓也
  • Organizer: 第42回溶液化学シンポジウム
• [Presentation] イミダゾリウム系イオン液体＋アセトニトリル溶液中におけるカチオン－アニオン間相互作用 (2019)
  • Author(s): 三橋遼、下村拓也
  • Organizer: 第42回溶液化学シンポジウム
• [Presentation] 相分離を起こすイミダゾリウム系イオン液体+ホスホニウム系イオン液体混合物のイオン間相互作用 (2019)
  • Author(s): 末木洸、下村拓也
  • Organizer: 第42回溶液化学シンポジウム
• [Presentation] 共通アニオンをもつイオン液体+イオン液体混合物の相分離挙動におよぼすカチオン構造の効果 (2019)
  • Author(s): 村山大雅、下村拓也
  • Organizer: 第10回イオン液体討論会
• [Presentation] イミダゾリウム系イオン液体のカチオン－アニオン相互作用におよぼすアセトニトリルの効果 (2019)
  • Author(s): 三橋遼、下村拓也
  • Organizer: 第10回イオン液体討論会
• [Presentation] 相分離を起こすイオン液体+イオン液体混合物のイオン間相互作用 (2019)
  • Author(s): 末木洸、下村拓也
  • Organizer: 第10回イオン液体討論会
• [Presentation] イオン液体混合物の物理化学的性質 (2019)
  • Author(s): 下村拓也
  • Organizer: 化学工学会第84年会
  • Invited
• [Presentation] Effects of the alkyl-chain length of cation on phase behavior of ionic liquid + ionic liquid mixtures with a common anion (2018)
  • Author(s): T. Shimomura, M. Sugiyama, M. Kurebayashi
  • Organizer: 35th International Conference on Solution Chemistry
  • Int'l Joint Research
• [Presentation] 臨界点近傍におけるイミダゾリウム系イオン液体+2-propanol溶液の物理化学的性質と自己拡散係数 (2018)
  • Author(s): 下村拓也、河野雄樹、金久保光央
  • Organizer: 化学工学会第50回秋季大会
• [Presentation] Physicochemical properties and self-diffusion coefficients of imidazolium-based ionic liquid+2-propanol mixtures (2018)
  • Author(s): T. Shimomura, Y. Kohno, M. Kanakubo
  • Organizer: Joint Conference of EMLG/JMLG Meeting 2018 and 41st Symposium on Solution Chemistry of Japan
  • Int'l Joint Research
• [Presentation] Effects of the alkyl chain lengths of alcohol on phase behavior of imidazolium-based ionic liquid + alcohol solutions (2018)
  • Author(s): M. Usui, T. Shimomura
  • Organizer: Joint Conference of EMLG/JMLG Meeting 2018 and 41st Symposium on Solution Chemistry of Japan
  • Int'l Joint Research