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Synthesis of temperature-responsive molecular sieve adsorbents and development of novel separation methods

Research Project

Project/Area Number 21K04746
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 27010:Transport phenomena and unit operations-related
Research InstitutionAkita University

Principal Investigator

Murakami Kenji  秋田大学, 理工学研究科, 教授 (10272030)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2023: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords温度応答性高分子 / 吸着剤 / ヒドロゲル / 分子篩 / 有機無機複合体 / メソポーラスシリカ
Outline of Research at the Start

アミノ酸などの比較的サイズの大きい分子を短時間で効率よく分離するための吸着剤を開発することを目指す。そのために,ここでは,温度応答性高分子ヒドロゲルを用いる。重合度と架橋度を上手く調整すれば,このヒドロゲルの3次元網目の空隙サイズは溶液温度に対して可逆的かつ連続的に変化すると考えられる。そこで本研究では,このヒドロゲルをメソポーラスシリカの外表面に付加して,温度によって目開きを自由に変えられる分子篩吸着剤を合成すること,およびこの吸着剤を用いた膜分離装置を開発することを目的とする。

Outline of Final Research Achievements

The purpose of this study is to develop an adsorbent that can change the size of adsorbable molecules in response to temperature by coating mesoporous silica with a hydrogel consisting of a temperature-responsive polymer and a crosslinker. Methacryloyl groups were added to the surface of the adsorbent, and then the temperature-responsive polymer hydrogel was immobilized to these groups. By increasing the amount of monomer and crosslinker, the amount of immobilized hydrogel increased from 34 to 67 wt%. As a secondary effect, this adsorbent flocculated when the water temperature was increased, making it easier to recover by precipitation. The adsorbed amount of methyl orange decreased monotonically with increasing temperature, indicating the possibility of controlling the size of molecules that can be adsorbed by temperature.

Academic Significance and Societal Importance of the Research Achievements

種々の物質が混合した系から目的とする物質を取り出したり,環境汚染物質を除去したりするために,吸着剤が良く使用されている。吸着剤には,高吸着容量,高選択性,高速吸着などの性能が求められる。このような要請に応える方法は幾つか提案されてきたが,いずれの方法も吸着対象となる物質が変われば,吸着剤の構造や性質を変えざるを得ないのが現状であった。一方,本研究では,その構造や性質を変えることなく,単に操作条件である水温を変えるだけで,選択性を変えることができるという吸着剤開発の手がかりを得ることができたという点で非常に意義深い。

Report

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

    (5 results)

All 2023 2022 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (3 results) (of which Int'l Joint Research: 2 results) Remarks (1 results)

  • [Journal Article] Temperature dependence of aggregation behavior and dye adsorption of poly(N-isopropylacrylamide) hydrogel/mesoporous silica composites2023

    • Author(s)
      Murakami Kenji、Imai Ayumi、Nakamura Ayano
    • Journal Title

      Colloids and Surfaces A: Physicochemical and Engineering Aspects

      Volume: 674 Pages: 131944-131944

    • DOI

      10.1016/j.colsurfa.2023.131944

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Presentation] Evaluation of structure and aggregation ability for mesoporous silica coated with PNIPAM hydrogel2023

    • Author(s)
      Kenji Murakami, Ayumi Imai and Ayano Nakamura
    • Organizer
      20th APCChE Congress and 84th PIChE National Convention
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Adsorption rate of methyl orange for PNIPAM/mesoporous silica adsorbent2023

    • Author(s)
      Saaya Ikeda, Ayano Nakamura, Kenji Murakami
    • Organizer
      International Symposium for the 80th Anniversary of the Tohoku Branch of the Chemical Society of Japan
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 温度応答性高分子被覆磁性吸着剤の色素吸着特性および凝集特性2022

    • Author(s)
      〇村上賢治,中村彩乃
    • Organizer
      化学工学会第53回秋季大会
    • Related Report
      2022 Research-status Report
  • [Remarks] 秋田大学理工学部物質科学科 応用化学コース 応用物理科学研究室ホームページ

    • URL

      https://www.gipc.akita-u.ac.jp/~physchem/

    • Related Report
      2023 Annual Research Report

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

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