Volume oscillation of microphase-separated gel

Shingo Maeda*, Shuji Hashimoto

*この研究の対応する著者

    研究成果査読

    16 被引用数 (Scopus)

    抄録

    In this study, The volume oscillation of the microphase-separated, self-oscillating gel above the volume phase transition temperature is discussed. The self-oscillating gel is composed of N-isopropylacrylamide (NIPAAm) with a metal catalyst for the Belousov-Zhabotinsky (BZ) reaction, which is known as the oscillating reaction. The influence of temperature on the period and the self-oscillating behavior is clarified. The volume change of the gel is explained by a change of the Flory-Huggins interaction parameter, χ, which is induced by the hydration and dehydration of the polymer chain due to a valance change of the metal catalyst (Ru(bpy)3 2+ ↔ Ru(bpy)3 3+) below the volume phase-transition temperature. In contrast, the volume change of the gel is explained by a change of the Donnan osmotic pressure. The volume oscillation of a microphaseseparated gel above the volume phase transition temperature is discussed. The oscillating motion is produced by the dissipating chemical energy of the oscillating reaction, that is, the Belouzov-Zhabotinsky (BZ) reaction occuring inside the gel. Although the gel is completely composed of synthetic polymer, it shows a self-oscillation as if it is alive.

    本文言語English
    ページ(範囲)343-349
    ページ数7
    ジャーナルMacromolecular Chemistry and Physics
    214
    3
    DOI
    出版ステータスPublished - 2013 2 12

    ASJC Scopus subject areas

    • 材料化学
    • ポリマーおよびプラスチック
    • 有機化学
    • 物理化学および理論化学
    • 凝縮系物理学

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