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Creation of softmaterials based on self-oscillating polymer gels

Polymer Journal volume 54, pages 827–849 (2022)Cite this article

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Abstract

In 1996, the author reported “self-oscillating” polymer gels that spontaneously repeat swelling–deswelling changes in a closed solution without any on–off switching by external stimuli, such as heart muscle. They have attracted considerable attention as a new type of gel with an autonomous function that is clearly different from conventional stimuli-responsive gels. The autonomy of the gel is provided by the design, which creates a dissipative structure in the material. The gel has an energy-conversion system involving an oscillatory chemical reaction (called the Belousov–Zhabotinsky (BZ) reaction), which allows periodic mechanical motion of the polymer chain. Since the first report, the author has systematically developed self-oscillating polymer gels from fundamental behavior to construction and demonstration of material systems for potential applications in biomimetic materials, such as autonomous soft actuators, automatic transport systems, and functional fluids exhibiting autonomous sol–gel oscillations similar to those of ameba. Recently, BZ gels with similar properties have sometimes been called “Yoshida gels”. In this review, the research developments and recent progress on self-oscillating polymer gels from the author’s group are summarized.

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Acknowledgements

This work was supported in part by Grants-in-Aid for Scientific Research (No. 20H00388, 15H02198, 22245037, 15205027 to R.Y.) from the Ministry of Education, Culture, Sports, Science, and Technology of Japan. The author thanks all group members with great sincerity and deeply appreciates the great contributions of coworkers and collaborators, especially TO (Tokyo Women’s Medical Univ.), MS (The Univ. of Tokyo), ACB (Univ. Pittsburgh, USA), TS (The Univ. of Tokyo), AM A (The Univ. of Tokyo), DS (Shinshu Univ., Japan), TU (NIMS), KO (JAIST), YK (POSTECH, Korea), TU (Nagoya Univ.), TM (The Univ. of Tokyo), RT (NIMS), MO (Nagoya Univ., MIT), KH (NIMS), TE (The Univ. of Tokyo), YH (AIST), KM (Toray, Co. Ltd.), YM (DNP, Co., Ltd.), YM (JPK. Inst., AG Japan), EJL (Samsung Electronic-Mechanics, Korea), YS (Goyo Paper Working, Co., Ltd.), KN (Keio Univ.), TM (Kansai Univ.), YT (Nagoya Univ.), SM (Shibaura Ins. Tech.), OT (Kyoto Univ.), and YH (Univ. Reading, UK).

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  1. Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan

    Ryo Yoshida

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Correspondence to Ryo Yoshida.

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Yoshida, R. Creation of softmaterials based on self-oscillating polymer gels. Polym J 54, 827–849 (2022). https://doi.org/10.1038/s41428-022-00638-8

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