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Development of Ionic liquids for energy-saving type air conditioning system; origin of the moisture absorption capability of ionic liquids

Research Project

Project/Area Number 21K05159
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 34030:Green sustainable chemistry and environmental chemistry-related
Research InstitutionToyota Physical and Chemical Research Institute

Principal Investigator

ITOH TOSHIYUKI  公益財団法人豊田理化学研究所, フェロー事業部門, フェロー (50193503)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywordsイオン液体 / 調湿材 / 液式調湿空調機 / 調湿機構解明 / 小角X線散乱スペクトル / MDシミュレーション / 調湿機構 / 124-トリアゾリウム塩 / ジメチルリン酸アニオン / 吸湿性 / ナノ構造体 / トリアゾリウムイオン液体 / ピラゾリウムイオン液体 / 平衡水蒸気圧 / ジカチオン性第4級アンモニウムリン酸ジメチル / 金属腐食性 / 調湿性 / 水蒸気吸放出機構 / 空調機 / 省エネ
Outline of Research at the Start

省エネは創エネと同等の価値を持ち,省エネ空調機の開発は環境保全技術の観点からも重要な課題である。液式調湿空調機は現在主流のコンプレッサー型空調機に較べて80%以下の消費電力で運転できる省エネ性能に加えて,換気を行いつつ調湿空調を行うという特長を持つため,新型コロナウイルスなどの室内感染を防ぐために有効な空調機である。ところが,現行の液式調湿空調機は高価な製品で普及が進んでいなかった。本研究では液式調湿空調機の調湿材としてイオン液体に着目し,イオン液体水溶液の水蒸気吸放出機構を解明し,液式調湿空調機に適したイオン液体のデザイン指針を確立する。

Outline of Final Research Achievements

We have been deeply interested in their moisture absorption capability because this makes ILs possible candidates for desiccants for the liquid desiccant-type air conditioners (LDAC). To gain insights into the origin of ILs’ dehumidification capability (DC), we systematically synthesized various types of ILs by combining dimethylphosphonium anions with various types of alkyl group-substituted cations and found that the DC was vary with the alkyl substituent of the cations. Among tested ILs, the best IL afforded 14-times higher DC (mol) than that of the popular solid desiccants CaCl2. We conducted small- and wide-angle X-ray scattering (SWAXS) analysis of 8 types of 1,2,4-triazolium dimethylphosphate and established that water from air is absorbed mainly into polar regions of nanostructured ILs. MD simulation experiments suggest that the introduction of an appropriate alkyl side chain in the cationic moiety can be the key to the design of efficient desiccant ILs for LDAC

Academic Significance and Societal Importance of the Research Achievements

液式調湿空調機は現在主流のコンプレッサー型空調機に較べて80%以下の消費電力で運転できる省エネ性能に加えて換気を行いつつ運転ができる.ところが現行の液式調湿空調機は調湿材として塩化リチウム水溶液を使用しているために普及が進んでおらず,塩化リチウムに替わる調湿材を開発することが地政学的観点からも求められていた.本研究では液式調湿空調機の調湿材に適したイオン液体の開発を目指して研究を進め,塩化リチウムを凌駕する調湿機能を持つイオン液体を見いだし,さらに従来未解明であったイオン液体の調湿機能の起源がイオン液体が形成するナノ集合体の構造に起因することを明らかにした.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (24 results)

All 2023 2022 2021 Other

All Int'l Joint Research (2 results) Journal Article (9 results) (of which Int'l Joint Research: 1 results,  Open Access: 5 results,  Peer Reviewed: 8 results) Presentation (5 results) (of which Int'l Joint Research: 2 results) Book (4 results) Patent(Industrial Property Rights) (4 results)

  • [Int'l Joint Research] Professor Hyung J. Kim/Carnegie Mellon University(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Carnegie Mellon University(米国)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Synthesis of Oligoglucosamine Analogues Containing the <i>N</i>,<i>N</i>,<i>N</i>-Trimethyl-d-glucosaminyl Unit by Automated Electrochemical Assembly2023

    • Author(s)
      Rahman, Md A.; Takahashi, S.; Sasaki, N.; Itoh, T.; Ohnuma, T.; Nokami, T.
    • Journal Title

      Electrochemistry

      Volume: 91 Issue: 11 Pages: 112013-112013

    • DOI

      10.5796/electrochemistry.23-67089

    • ISSN
      1344-3542, 2186-2451
    • Year and Date
      2023-11-28
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] ジカチオン性ならびに トリカチオン性リン酸ジメチルイオン液体の調湿機能2023

    • Author(s)
      伊藤敏幸
    • Journal Title

      豊田理化学研究所研究報告

      Volume: 76 Pages: 29-37

    • Related Report
      2023 Annual Research Report
    • Open Access
  • [Journal Article] Characterization of Information-Transmitting Materials Produced in Ionic Liquid-based Neuromorphic Electrochemical Devices for Physical Reservoir Computing2023

    • Author(s)
      Sato, D.; Shima, H.; Matsuo, T.; Yonezawa, M.; Kinoshita, K.; Kobayashi, M.; Naitoh, Y.; Akinaga, H.; Miyamoto, S.; Nokami, T.; Itoh, T.
    • Journal Title

      ACS Applied Materials & Interface

      Volume: 15 Issue: 42 Pages: 49712-49726

    • DOI

      10.1021/acsami.3c08638

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Electrochemical Synthesis of Protected Cyclic (1,3;1,6)-β-Glucan Dodecasaccharide2023

    • Author(s)
      Shibuya, A.; Ishisaka, Y.; Saito, A.; Kato, M.; Manmode, S.; Sasaki, N.; Itoh, T.; Nokami, T.
    • Journal Title

      Faraday Discus

      Volume: 247 Pages: 59-69

    • DOI

      10.1039/d3fd00045a

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Synthesis of selectively gem-difluorinated molecules; chiral gem-difluorocyclopropanes via chemo-enzymatic reaction and gem-difluorinated compounds via radical reaction2023

    • Author(s)
      Itoh, T.; Hayase, S.; Nokami, T.
    • Journal Title

      The Chemical Record

      Volume: 23 Issue: 9

    • DOI

      10.1002/tcr.202300028

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Enzymatic Reactions using Ionic Liquids for Green Sustainable Chemical Process; Stabilization and Activation of Lipases2023

    • Author(s)
      Itoh, T.
    • Journal Title

      The Chemical Record

      Volume: 23 Issue: 8

    • DOI

      10.1002/tcr.202200275

    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Temperature Driven Current-Voltage Characteristics of Ionic Liquid Type Intelligent Connection Device2022

    • Author(s)
      Kobayashi,M.; Orii, Y.; Shima, H.; Naitoh, Y.; Akinaga, H.; Sato, D.; Matsuo, M.; Kinoshita, K.; Nokami,T.; Itoh, T.
    • Journal Title

      IEEE J. Electron Devices Society

      Volume: 10 Pages: 893-897

    • DOI

      10.1109/jeds.2022.3199205

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Dynamic Nonlinear Behavior of Ionic Liquid-based Reservoir Computing Devices2022

    • Author(s)
      Matsuo, T.; Sato, D.; Koh, S-G.; Shima, H.; Naitoh, Y.; Akinaga, H.; Itoh, T.; Nokami, T.; Kobayashi, M.; Kinoshita1, K.
    • Journal Title

      ACS Applied Materials & Interfaces10

      Volume: 14 Issue: 32 Pages: 36890-36901

    • DOI

      10.1021/acsami.2c04167

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Dicationic Type Quaternary Ammonium Salts as Candidates of Desiccants for an Air-Conditioning System2021

    • Author(s)
      Itoh, T.; Hiramatsu, M.; Kamada, K.; Nokami, T.; Nakayama, H.; Yagi, K.; Yan, F.; Kim, H-J.
    • Journal Title

      ACS Sustainable Chem. Eng.

      Volume: 9 Issue: 43 Pages: 14502-14514

    • DOI

      10.1021/acssuschemeng.1c04971

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Design of Ionic Liquids as desiccants for green sustainable liquid desiccant air-conditioning system (OP08-5)2023

    • Author(s)
      ○Toshiyuki Itoh, Toshiki Nokami, Hyung J. Kim
    • Organizer
      9th Congress on Ionic Liquids (COIL 9),Lyon France
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 1,2,4-トリアゾリウムイオン液体の吸湿機構の解明 (2BO-01)2023

    • Author(s)
      ○伊藤敏幸,野上敏材,Hyung J. Kim
    • Organizer
      第13回イオン液体討論会, 新潟
    • Related Report
      2023 Annual Research Report
  • [Presentation] 1,2,4-トリアゾリウム塩イオン液体の吸湿機構 (OC-31)2023

    • Author(s)
      ○伊藤敏幸,野上敏材,Hyung J. Kim
    • Organizer
      第50回有機典型元素化学討論会,大宮
    • Related Report
      2023 Annual Research Report
  • [Presentation] Design of Ionic Liquids as candidates of desiccants for green sustainable air-conditioning system2022

    • Author(s)
      Toshiyuki Itoh
    • Organizer
      28th EUCHEM conference on Molten Salts & Ionic Liquids
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 環境調和型空調機用のための調湿材イオン液体のデザイン2022

    • Author(s)
      伊藤敏幸, 野上敏材,Hyung J. Kim
    • Organizer
      第12回イオン液体討論会
    • Related Report
      2022 Research-status Report
  • [Book] Encyclopedia of Ionic Liquids, Section 8 (Ionic Liquids in Biomass and Biomolecules), Ed. S-J. Zhang, Section Editors: T. Itoh and J. Sun2023

    • Author(s)
      T. Itoh
    • Total Pages
      12
    • Publisher
      Springer/Nature Singapore Pte Ltd.
    • ISBN
      9789813342200
    • Related Report
      2023 Annual Research Report
  • [Book] "Biocatalysis in Green Solvents",P. Lozano Ed.2022

    • Author(s)
      Itoh, T.; Takagi Y.
    • Total Pages
      562
    • Publisher
      Academic Press (Elsevier)
    • ISBN
      9780323913065
    • Related Report
      2022 Research-status Report
  • [Book] 「新材料・新素材シリーズ,イオン液体の実用展開へ向けた最新動向」監修:大内幸雄2022

    • Author(s)
      伊藤敏幸,野上敏材
    • Total Pages
      321
    • Publisher
      CMC出版
    • ISBN
      9784781316741
    • Related Report
      2022 Research-status Report
  • [Book] 化学の要点シリーズ37, イオン液体,日本化学会編集2021

    • Author(s)
      西川恵子・伊藤敏幸・大野弘幸
    • Total Pages
      154
    • Publisher
      共立出版
    • ISBN
      9784320044784
    • Related Report
      2021 Research-status Report
  • [Patent(Industrial Property Rights)] 調湿材および装置2022

    • Inventor(s)
      伊藤敏幸,井上 僚,安藤達弥,池上周司
    • Industrial Property Rights Holder
      公益財団法人豊田理化学研究所,ダイキン工業株式会社
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2022-129089
    • Filing Date
      2022
    • Related Report
      2022 Research-status Report
  • [Patent(Industrial Property Rights)] 調湿材および装置2022

    • Inventor(s)
      伊藤敏幸,井上 僚,安藤達弥,池上周司
    • Industrial Property Rights Holder
      公益財団法人豊田理化学研究所,ダイキン工業株式会社
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2022-101625
    • Filing Date
      2022
    • Related Report
      2022 Research-status Report
  • [Patent(Industrial Property Rights)] 調湿材および装置2022

    • Inventor(s)
      伊藤敏幸,井上 僚,安藤達弥,池上周司
    • Industrial Property Rights Holder
      公益財団法人豊田理化学研究所,ダイキン工業株式会社
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2022-006519
    • Filing Date
      2022
    • Related Report
      2022 Research-status Report
  • [Patent(Industrial Property Rights)] 調湿材および装置2022

    • Inventor(s)
      伊藤敏幸,井上僚,安藤達弥,池上周司
    • Industrial Property Rights Holder
      伊藤敏幸,井上僚,安藤達弥,池上周司
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2022-006519
    • Filing Date
      2022
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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