Chemical robot - Design of self-walking gel

Shingo Maeda*, Yusuke Hara, Ryo Yoshida, Shuji Hashimoto

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    9 Citations (Scopus)


    Stimuli-responsive polymers and gels have been applied to biomimetie actuators or artificial muscles. Biomimetic robots using such materials can move like a living creature. Especially, electroactive polymers are said to be promising materials as advanced soft actuators. Its mechanical motion is controlled by external stimuli such as a change in solvent composition, pH, temperature and electric field etc. On the other hand, many living organisms generate an autonomous motion without external driving stimuli. In this paper, we report a novel biomimetic gel actuator that can bend and stretch with worm-like motion spontaneously without external driving stimuli. The gel actuator converts the chemical energy of oscillating reaction, i.e., the Belouzov-Zhabotinsky (BZ) reaction into the kinetic energy inside the gel. Although the gel is completely composed of synthetic polymer, it shows autonomous motion as if it is alive. To cause anisotropic contraction with curvature changes, the gel strip with gradient structure was prepared. Furthermore, the gel can walk with repeated bending and stretching motion by itself like a looper by coupling with ratchet mechanism. The "self-walking" gel actuator will create a new framework of biomimetic chemical robot.

    Original languageEnglish
    Title of host publicationIEEE International Conference on Intelligent Robots and Systems
    Number of pages6
    Publication statusPublished - 2007
    Event2007 IEEE/RSJ International Conference on Intelligent Robots and Systems, IROS 2007 - San Diego, CA
    Duration: 2007 Oct 292007 Nov 2


    Other2007 IEEE/RSJ International Conference on Intelligent Robots and Systems, IROS 2007
    CitySan Diego, CA


    • Chemical robot
    • Polymer gels
    • Self-oscillation

    ASJC Scopus subject areas

    • Control and Systems Engineering


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