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Journal of Intelligent Material Systems and Structures
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Electrically Driven Polymer Gel Finger Working in the Air

Tohru Shiga

Toyota Central Research & Development Laboratories, Inc. Nagakute-cho, Aichi-gun Aichi-ken, 480-11 Japan

Yoshiharu Hirose

Toyota Central Research & Development Laboratories, Inc. Nagakute-cho, Aichi-gun Aichi-ken, 480-11 Japan

Akane Okada

Toyota Central Research & Development Laboratories, Inc. Nagakute-cho, Aichi-gun Aichi-ken, 480-11 Japan

Toshio Kurauchi

Toyota Central Research & Development Laboratories, Inc. Nagakute-cho, Aichi-gun Aichi-ken, 480-11 Japan

Using ionic polymer gel that demonstrated an electric field-associated bending mo tion in aqueous solutions, an electrically driven polymer gel finger has been constructed. The material used for the finger was a hybrid gel of a cylindrical poly(vinyl alcohol)-poly(sodium acrylate) composite gel (PVA-PAA gel) rod and PVA gel film containing sodium carbonate as a skin. The working gel finger has been designed by equipping the PVA gel film of the hybrid gel with two platinum wires as electrodes. When a dc voltage was applied, the finger bent smoothly toward the positive electrode at a relatively high speed in the air. The bending of the finger occurred through a differential swelling of the PVA-PAA gel in the hybrid gel. A prototype of a microrobot hand with two gel fingers has also been designed. The hand grasped or released a piece of paper in response to electric signals.

Journal of Intelligent Material Systems and Structures, Vol. 4, No. 4, 553-557 (1993)
DOI: 10.1177/1045389X9300400417
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