IMCE

Institute for Materials Chemistry and Engineering, Kyushu University

九州大学
先導物質化学研究所

LAST UPDATE 2017/02/25

  • 研究者氏名
    Researcher Name

    高橋良彰　Yoshiaki TAKAHASHI
    准教授　Associate Professor

  • 所属
    Professional Affiliation

    九州大学先導物質化学研究所
    Institute for Materials Chemistry and Engineering, Kyushu University

    物質機能評価センター・物質機能評価室
    Evaluation Office of Materials Properties and Function

  • 研究キーワード
    Research Keywords

    モデル高分子
    天然高分子
    イオン液体
    レオロジー
    Model polymers
    Natural polymers
    Ionic liquids
    Rheology
研究テーマ
Research Subject
高分子系ソフトマターの分子および階層構造とレオロジー的性質の関係に関する研究
Study on the relations between molecular and/or hierarchical structures and rheological properties of polymeric soft matter.

研究の背景 Background

高分子および類似のソフトマターは、分子構造および階層構造に著しい多様性があり、その階層構造は種々の外部刺激で変化します。高分子系ソフトマターの構造とレオロジー的性質の解明は、基礎物性の分子論や特性評価にとどまらず、高分子系材料の物性制御や成型加工の観点からも重要視されています。また天然高分子の有効利用には新しい分子特性評価法の発展も重要です。

Polymeric soft matters have significant diversity in their molecular and/or hierarchical structures, and the latter can be changed by external stimuli. Study on the relations between structures and rheological properties of polymers and analogous soft matters have been developed to understand the basic physical properties from molecular view and also as a method of characterization. It is now being important from point of view of controlling physical properties and industrial processing. In addition, development of new molecular characterization methods for natural polymers are also important to efficiently use those polymers.

研究の目標 Outcome

２元および３元ブロック共重合体や環状構造を有するモデル高分子の分子構造および階層構造とレオロジー挙動の関係の解明。セルロースや絹フィブロインといった難溶性天然高分子のイオン液体溶液を用いたレオロジーによる分子特性評価法の発展。

For model polymers such as di- and triblock copolymers as well as those containing ring structure of polymer molecules, the research is directed to understand the relations between their molecular and/or hierarchical structures and rheological properties. For natural polymers such as cellulose and silk fibroins, which are insoluble into conventional solvents, rheological measurements for ionic liquid solutions of those polymers are conducted to develop new characterization methods for those polymers.

研究図Research Figure

Fig.1. Image of loop and bridge chains in triblock copolymers and bridge content dependence of modulus. Fig.2.Molecular weight dependence of relaxation time for symmetric SP diblock copolymers. Fig.3. Molecular weight dependence of intrinsic viscosity of pullulan in different solvents.

文献 / Publications

高分子, 59, 724 (2010). 放射線化学, 91, 45 (2011). Polymer, 53, 3354 (2012). Macromolecules, 46, 7097 (2013). Nihon Reoroji Gakkaishi (Journal of the Society of Rheology, Japan), 42, 191 (2014).

研究者HP