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Simultaneous Enhancement of Bending and Blocking Force of an Ionic Polymer-Metal Composite (IPMC) by the Active Use of Its Material Characteristics Change

1
Department of Mechanical Engineering, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, Japan
2
Applied Physics Course, Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, Japan
3
Department of Mechanical and Material Engineering, UTAR Sungai Long Campus, Jalan Sungai Long, Bandar Sungai Long, Cheras, Kajang 43000, Selangor, Malaysia
4
Graduate School of Advanced Mathematical Sciences, Meiji University, 4-21-1, Nakano, Nakano-ku, Tokyo 165-8525, Japan
*
Author to whom correspondence should be addressed.
Actuators 2019, 8(1), 29; https://doi.org/10.3390/act8010029
Received: 24 December 2018 / Revised: 14 March 2019 / Accepted: 15 March 2019 / Published: 25 March 2019
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PDF [597 KB, uploaded 25 March 2019]
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Abstract

The exhibition of significantly large bending is a remarkable characteristic of an ionic polymer-metal composite (IPMC). However, its inability to generate a high enough force is a major problem in achieving a practical IPMC actuator. The simultaneous enhancement of bending and force generation is needed for broadening the potential of the IPMC actuator as a practical engineering device. Corrosive materials as a flexible electrode of the IPMC is usually not preferred, whereas a noncorrosive material such as platinum is broadly used. Here, we used silver, a corrosive metal, as an IPMC electrode intentionally. The silver electrode exhibits a reversible redox reaction upon an external electric stimulation. That silver redox reaction resulted in the material characteristics change of the IPMC, and it consequently resulted in the simultaneous enhancement of the IPMC bending curvature and blocking force generation. It was further found that the thicker silver coating anchored into the far inside of the IPMC led to the occurrence of a significant silver redox reaction and it altered the material characteristics of the IPMC, consequently turning the IPMC into a greatly deformable and high force generative one. View Full-Text
Keywords: IPMC; bending; force generation; silver layer; redox reaction IPMC; bending; force generation; silver layer; redox reaction
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Tamagawa, H.; Okada, K.; Mulembo, T.; Sasaki, M.; Naito, K.; Nagai, G.; Nitta, T.; Yew, K.-C.; Ikeda, K. Simultaneous Enhancement of Bending and Blocking Force of an Ionic Polymer-Metal Composite (IPMC) by the Active Use of Its Material Characteristics Change. Actuators 2019, 8, 29.

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