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Conformation and aggregation of polyelectrolytes in mixture solvents

Research Project

Project/Area Number 17K05612
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Biological physics/Chemical physics/Soft matter physics
Research InstitutionKyoto University

Principal Investigator

Araki Takeaki  京都大学, 理学研究科, 准教授 (20332596)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords高分子電解質 / コンフォメーション変化 / 混合溶媒 / 臨界カシミール力 / 相分離 / レオロジー / 高分子鎖 / 臨界カシミール効果 / 数値シミュレーション / 電解質高分子 / 粘弾性 / 高分子構造・物性 / 計算物理 / ソフトマター
Outline of Final Research Achievements

We studied behaviors of polyelectrolytes in mixture solvents such as water/organic liquid mixture by means of mesoscopic numerical simulations. In contrast to a conventional picture (single liquid approximation), in which the mixture is assumed to be uniform, we found that the concentration of the more preferred component in the mixture solvent is increased locally around the polymer chains and this inhomogeneity of the mixture solvent leads to conformation changes of the polymer chains, aggregation of the polymers and phase separation. Their behaviors depend on many parameters such as the interaction parameters among the components and mixing fractions. We also studied the early stage behaviors of the phase separation in polymer solutions and the rheological properties of the aggregated globule state of the polymers in mixture solvents.

Academic Significance and Societal Importance of the Research Achievements

本研究は混合溶媒中の高分子電解質に対し、溶媒の濃度不均一性によって引き起こされる実効的な引力、およびその影響について取り組む世界で初めての研究である。タンパク質の構造形成、DNAのエタノール沈殿現象など、混合溶媒中の高分子電解質のコンフォメーション・凝集構造に関する研究は数多くあるが、これまでは溶媒は均一と仮定され、その影響は無視されてきた。本研究で得られた溶媒の不均一性に関する成果は将来、高分子・ソフトマター物理学のみならず、化学・生物学・遺伝子工学などの他分野にも有用な知見を与え、社会的にも大きな意味を持つことになると期待している。

Report

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

    (38 results)

All 2020 2019 2018 2017 Other

All Int'l Joint Research (8 results) Journal Article (6 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 6 results,  Open Access: 2 results) Presentation (23 results) (of which Int'l Joint Research: 10 results,  Invited: 8 results) Funded Workshop (1 results)

  • [Int'l Joint Research] ルクセンブルグ大学(ルクセンブルク)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] マックスプランク研究所/エルランゲン大学(ドイツ)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] コム大学(イラン)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Max Planck Institute(ドイツ)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] University of Luxembourg(ルクセンブルク)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] IASBS/University of Qom(イラン)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] Max Planck研究所(ドイツ)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Ecole Normale Superieure(フランス)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Dynamics control of an in-plane-switching liquid crystal cell using heterogeneous substrates2020

    • Author(s)
      Lee Kuang-Wu、Araki Takeaki、Yamamoto Jun
    • Journal Title

      Soft Matter

      Volume: 16 Issue: 2 Pages: 348-356

    • DOI

      10.1039/c9sm01742a

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Illumination-induced motion of a Janus nanoparticle in binary solvents2019

    • Author(s)
      Araki Takeaki、Maciolek Anna
    • Journal Title

      Soft Matter

      Volume: 15 Issue: 26 Pages: 5243-5254

    • DOI

      10.1039/c9sm00509a

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Isotropic?isotropic phase separation and spinodal decomposition in liquid crystal?solvent mixtures2019

    • Author(s)
      Reyes Catherine G.、Baller Jorg、Araki Takeaki、Lagerwall Jan P. F.
    • Journal Title

      Soft Matter

      Volume: 15 Issue: 30 Pages: 6044-6054

    • DOI

      10.1039/c9sm00921c

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Modifying Nobil-Durand surface energy for conically degenerate anchorings at the interface of liquid crystal colloids2019

    • Author(s)
      Seyed Reza Seyednejad, Takeaki Araki and Mohammad Reza Mozaffari
    • Journal Title

      Physical Review E

      Volume: 99 Issue: 3 Pages: 032702-032702

    • DOI

      10.1103/physreve.99.032702

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Interactions between pentagonal trancated pyramids with homeotropic anchoring in a nematic liquid crystal2018

    • Author(s)
      Seyed Reza Seyednejad, Mohammnad Reza Mozaffari, Takeaki Araki, and Ehsan Nedaaee Oskoee
    • Journal Title

      Physical Review E

      Volume: 98 Issue: 3 Pages: 032701-032701

    • DOI

      10.1103/physreve.98.032701

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Colloidal suspensions in one-phase mixed solvents under shear flow2017

    • Author(s)
      Armand Barbot and Takeaki Araki
    • Journal Title

      Soft Matter

      Volume: 13 Issue: 35 Pages: 5911-5921

    • DOI

      10.1039/c7sm00861a

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Illumination-induced motion of Janus particle in binary mixtures2019

    • Author(s)
      Takeaki Araki
    • Organizer
      The 5th International Soft Matter Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Soft Matter Modeling: Colloids and polymers in a binary mixture near its critical point2019

    • Author(s)
      Takeaki Araki
    • Organizer
      The 6th AGORA BASF
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ソフトな分子の混合系におけるSoret 効果2019

    • Author(s)
      荒木武昭・近清なつみ
    • Organizer
      第9回ソフトマター研究会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 高分子溶液の粘弾性相分離における構造形成過程2019

    • Author(s)
      Woohyon Lim・荒木武昭
    • Organizer
      第9回ソフトマター研究会
    • Related Report
      2019 Annual Research Report
  • [Presentation] やわらかい分子の混合系におけるSoret効果2019

    • Author(s)
      荒木武昭・近清なつみ
    • Organizer
      2019年日本物理学会秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 高分子溶液系の粘弾性相分離における絡み合い効果2019

    • Author(s)
      Woohyon Lim・荒木武昭
    • Organizer
      2019年日本物理学会秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 不均一なアンカリング界面に挟まれたネマチック液晶の外場 応答2019

    • Author(s)
      荒木武昭・kuang-Wu Lee・山本潤
    • Organizer
      2019年 日本液晶学会討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Slippery界面の状態と制御 -Weak アンカリングとアンカリング エネルギーの自在制御-2019

    • Author(s)
      山本潤・高本幸希・荒木武昭・神野裕貴・西山伊佐・箕浦潔・菊池裕嗣
    • Organizer
      2019年 日本液晶学会討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Propelled motion of Janus particles in binary mixtures2018

    • Author(s)
      Takeaki Araki
    • Organizer
      Soft matter at interfaces 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Numerical simulations of nematic liquid crystal confined in cells with slippery interfaces2018

    • Author(s)
      Takeaki Araki, Kuang Wu Lee and Jun Yamamoto
    • Organizer
      The 3rd CBNU-CREST workshop
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Molecular dynamics simulation of slippery surface: Effects of impurity on anchoring strength2018

    • Author(s)
      Takeaki Araki and Jun Yamamoto
    • Organizer
      The 27th International Liquid Crystal Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Propelled motion of a Janus particle in binary mixtures2018

    • Author(s)
      Takeaki Araki and Anna Maciolek
    • Organizer
      Soft Matter Physics: from the perspective of the essential heterogeneity
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Polymers in multi-component and aqueous solutions2018

    • Author(s)
      Takeaki Araki
    • Organizer
      DPG (Germany Physical Society) Spring meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Illumination-induced motion of Janus particle in binary mixtures2018

    • Author(s)
      Takeaki Araki and Ania Maciolek
    • Organizer
      Active Matter Workshop 2018
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 混合溶媒中におけるヤヌス粒子の光誘起駆動2018

    • Author(s)
      荒木武昭・Anna Maciolek
    • Organizer
      日本物理学会 第73回年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 混合溶媒中のコロイド分散系のレオロジー2017

    • Author(s)
      荒木武昭・Armand Barbot
    • Organizer
      第31回分子シミュレーション討論会
    • Related Report
      2017 Research-status Report
  • [Presentation] Ginzburg-Landau theory of smectic C* phase confined in a thin cell2017

    • Author(s)
      Takeaki Araki, Satoshi Takada, Kuang-Wu Lee
    • Organizer
      2nd CREST-CBNU Workshop
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 混合溶媒中のコロイド粒子・電解質高分子鎖の振る舞い2017

    • Author(s)
      荒木武昭
    • Organizer
      「接着界面科学研究会」第7回例会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 混合溶媒中のコロイド分散系のレオロジー2017

    • Author(s)
      荒木武昭・Armand Barbot
    • Organizer
      第7回ソフトマター研究会
    • Related Report
      2017 Research-status Report
  • [Presentation] 薄いセルに封入したスメクチックC*相のGinzburg-Landauモデル2017

    • Author(s)
      高田智史・荒木武昭
    • Organizer
      2017年日本液晶学会討論会
    • Related Report
      2017 Research-status Report
  • [Presentation] 混合溶媒中のコロイド分散系のレオロジー2017

    • Author(s)
      荒木武昭
    • Organizer
      化学工学会第48回秋季大会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Colloidal suspensions in one-phase mixed solvents under shear flow2017

    • Author(s)
      Armand Barbot and Takeaki Araki
    • Organizer
      10th Liquid Matter Conference
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 流体力学的相互作用を考慮したコロイド分散系のシミュレーション法とその混合溶媒中のコロイド・高分子への応用2017

    • Author(s)
      荒木武昭
    • Organizer
      第68回コロイドおよび界面化学討論会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Funded Workshop] Soft Matter Physics: from the perspective of the essential heterogeneity2018

    • Related Report
      2018 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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