Design of a mass transport surface utilizing peristaltic motion of a self-oscillating gel

Yoko Murase, Shingo Maeda, Shuji Hashimoto, Ryo Yoshida

    Research output: Contribution to journalArticle

    91 Citations (Scopus)

    Abstract

    Novel conveyer gels exhibiting autonomous peristaltic motion without external stimuli were prepared by copolymerizing temperature-responsive N-isopropylacrylamide (NIPAAm), ruthenium tris(2,2'-bipyridine) (Ru(bpy) 3) as the catalyst for the Belousov-Zhabotinsky (BZ) reaction, and 2-acrylamido-2-methylpropanesulfonic acid (AMPS). When the gel was immersed in the catalyst-free BZ solution, the BZ reaction occurred in the gel and the chemical wave propagated followed by the peristaltic motion of the gel. In this study, we investigated the influence of the AMPS feed ratio on the network structure and the swelling-deswelling properties of the poly(NIPAAm-co-Ru(bpy) 3-co- AMPS) gels. The gel had a microphase-separated structure when the AMPS feed ratio was less than 5 mol % due to the effect of the poor solvent in the polymerization process. On the other hand, when the AMPS feed ratio is more than 10 mol %, the gel is a homogeneous structure. The microphase-separated structure highly improved the swelling-deswelling kinetics and generated a swelling-deswelling amplitude of more than 10% of the gel thickness, which was approximately 10 times larger than that of the gel with a homogeneous network structure. Further, we attempted to transport an object by utilizing the peristaltic motion of poly(NIPAAm-co-Ru(bpy) 3-co-AMPS) gels. A cylindrical poly(acrylamide) (PAAm) gel was transported on the gel surface with the propagation of the chemical wave when the AMPS feed ratio was low (less than 2.5 mol %). We have proposed a model to describe the mass transport phenomena based on the Hertz contact theory, and the relation between the transportability and the peristaltic motion was discussed. It was found that the microphase-separated structure of the gel had an important role for mass transport phenomena.

    Original languageEnglish
    Pages (from-to)483-489
    Number of pages7
    JournalLangmuir
    Volume25
    Issue number1
    DOIs
    Publication statusPublished - 2009 Jan 6

    Fingerprint

    Mass transfer
    Gels
    gels
    acids
    Acids
    2,2'-Dipyridyl
    swelling
    Swelling
    catalysts
    Catalysts
    Ruthenium
    Polyacrylates
    stimuli
    ruthenium
    polymerization
    Polymerization
    Kinetics
    propagation
    kinetics

    ASJC Scopus subject areas

    • Electrochemistry
    • Condensed Matter Physics
    • Surfaces and Interfaces
    • Materials Science(all)
    • Spectroscopy

    Cite this

    Design of a mass transport surface utilizing peristaltic motion of a self-oscillating gel. / Murase, Yoko; Maeda, Shingo; Hashimoto, Shuji; Yoshida, Ryo.

    In: Langmuir, Vol. 25, No. 1, 06.01.2009, p. 483-489.

    Research output: Contribution to journalArticle

    Murase, Y, Maeda, S, Hashimoto, S & Yoshida, R 2009, 'Design of a mass transport surface utilizing peristaltic motion of a self-oscillating gel', Langmuir, vol. 25, no. 1, pp. 483-489. https://doi.org/10.1021/la8029006
    Murase, Yoko ; Maeda, Shingo ; Hashimoto, Shuji ; Yoshida, Ryo. / Design of a mass transport surface utilizing peristaltic motion of a self-oscillating gel. In: Langmuir. 2009 ; Vol. 25, No. 1. pp. 483-489.
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