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Proceedings Paper

Can we overcome the relaxation of ionic polymer-metal composites?
Author(s): Doyeon Kim; Kwang J. Kim
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Paper Abstract

Currently, there is a major engineering challenge associated with Ionic Polymer-Metal Composites (IPMCs) that needs to be resolved before they can be widely adopted in future engineering markets--relaxation of the IPMC actuator under a DC voltage. In this paper, we rigorously discuss the origin of the relaxation phenomena of IPMCs. Our measured voltammograms and deflection data of IPMCs reveal that the relaxation phenomena of the IPMC actuators are primarily caused by the overpotential of surface electrodes. The overpotential values of ca. +1 V were clearly noted in many IPMC samples. We believe that the relaxation of IPMCs originate from the platinum oxide formation during actuation-a key surface reaction. The IPMC solvated with 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim] [PF6]) showed a large bending, but there was no relaxation during actuation because there was no platinum oxide formation.

Paper Details

Date Published: 5 April 2007
PDF: 11 pages
Proc. SPIE 6524, Electroactive Polymer Actuators and Devices (EAPAD) 2007, 65240A (5 April 2007); doi: 10.1117/12.715365
Show Author Affiliations
Doyeon Kim, Univ. of Nevada/Reno (United States)
Kwang J. Kim, Univ. of Nevada/Reno (United States)

Published in SPIE Proceedings Vol. 6524:
Electroactive Polymer Actuators and Devices (EAPAD) 2007
Yoseph Bar-Cohen, Editor(s)

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