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Analysis of transport properties of radiation-grafted cation and anion exchange membranes and their application to reverse electrodialysis

Research Project

Project/Area Number 16K06839
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Properties in chemical engineering process/Transfer operation/Unit operation
Research InstitutionNational Institutes for Quantum and Radiological Science and Technology

Principal Investigator

Sawada Shin-ichi  国立研究開発法人量子科学技術研究開発機構, 高崎量子応用研究所 先端機能材料研究部, 主幹研究員(定常) (70414571)

Co-Investigator(Kenkyū-buntansha) 前川 康成  国立研究開発法人量子科学技術研究開発機構, 高崎量子応用研究所, 副所長(定常) (30354939)
Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords逆電気透析発電 / 放射線グラフト法 / カチオン交換膜 / アニオン交換膜 / 膜抵抗 / 放射線グラフト重合 / イオン伝導 / 水透過 / 陽イオン交換膜 / 陰イオン交換膜
Outline of Final Research Achievements

I developed the cation exchange membranes (CEMs) and anion exchange membranes (AEMs) by a radiation grafting method and then applied them for reverse electrodialysis (RED). CEMs were prepared by grafting of styrene into ethylene-co-tetrafluoroethylene (ETFE) base films and subsequent sulfonation. AEMs were prepared by grafting of chloromethylstyrene into ETFE films and subsequent quaternization. The resistance of the prepared CEMs and AEMs dramatically decreased with increasing the ion exchange capacity (IEC). The minimum resistance of the CEM and AEM was considerably lower than those of the commercial CEM and AEM. Five pairs of the grafted CEMs and AEMs were used for the RED. The high- and low-concentration sodium chloride solutions were supplied to the RED cell. The output power density was significantly higher than the cell employing the commercial CEMs and AEMs. It was demonstrated that the radiation-grafted CEMs and AEMs were suitable for RED application.

Academic Significance and Societal Importance of the Research Achievements

逆電気透析発電は、海水と淡水から電気を生産する極めてクリーンな再生可能エネルギーである。これまで、RED発電の出力を上げるため、電気抵抗の低いカチオン交換膜(CEM)とアニオン交換膜(AEM)が模索されていた。本研究により、放射線グラフト重合法で作製した低抵抗のCEMとAEMを用いると、従来市販膜の場合と比べ、発電出力を大幅に向上できることがわかった。RED発電の産業実用化、ひいては再生可能エネルギーの普及に貢献し得る成果として、社会的な意義は大きい。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (5 results)

All 2019 2018 2017

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Ion and water transport properties of cation exchange membranes prepared by heavy-ion-track grafting technique2019

    • Author(s)
      S. Sawada, M. Goto, H. Koshikawa, A. Kitamura, M. Higa & T.Yamaki
    • Journal Title

      Separation Science and Technology

      Volume: - Issue: 12 Pages: 2211-2216

    • DOI

      10.1080/01496395.2019.1648510

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] 放射線グラフト陽・陰イオン交換膜を用いた逆電気透析発電2018

    • Author(s)
      澤田真一、安保貴和、安川政宏、垣花百合子、比嘉充、前川康成
    • Organizer
      膜シンポジウム2018
    • Related Report
      2018 Research-status Report
  • [Presentation] 放射線グラフト陽・陰イオン交換膜を用いた逆電気透析装置の発電性能2018

    • Author(s)
      澤田真一、安保貴和、匠伸弥、安川政宏、垣花百合子、比嘉充、前川康成
    • Organizer
      第17回放射線プロセスシンポジウム
    • Related Report
      2018 Research-status Report
  • [Presentation] 逆電気透析発電用放射線グラフト陽イオン交換膜の水・イオン輸送特性2017

    • Author(s)
      澤田真一、安川政宏、比嘉充、前川康成
    • Organizer
      2017年電気化学秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Preparation of cation and anion exchange membranes for reverse electrodialysis by radiation-induced grafting method2017

    • Author(s)
      澤田真一、安川政宏、比嘉充、前川康成
    • Organizer
      5th International Conference on Nanotechnology and Materials Science
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2021-02-19  

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