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Proceedings Paper

Nonlinear capacitance of ionic polymer-metal composites
Author(s): Zheng Chen; Dawn Rochelle Hedgepeth; Xiaobo Tan
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Paper Abstract

Ionic polymer-metal composites (IPMCs) form an important category of electroactive polymers. In this paper, a nonlinear, physics-based model is proposed for IPMC actuators. A key component in the proposed model is the nonlinear capacitance of IPMC, demonstrated by the nonlinear relationship between an applied step voltage and the induced charge. A nonlinear partial differential equation (PDE) is fully considered in analytical derivation of the capacitance of IPMC. The nonlinear capacitance is incorporated into a circuit model, which includes additionally the pseudo capacitance, the ion diffusion resistance, and the nonlinear DC resistance of the polymer. The model is verified in experiments.

Paper Details

Date Published: 6 April 2009
PDF: 12 pages
Proc. SPIE 7287, Electroactive Polymer Actuators and Devices (EAPAD) 2009, 728715 (6 April 2009); doi: 10.1117/12.815792
Show Author Affiliations
Zheng Chen, Michigan State Univ. (United States)
Dawn Rochelle Hedgepeth, Michigan State Univ. (United States)
Xiaobo Tan, Michigan State Univ. (United States)

Published in SPIE Proceedings Vol. 7287:
Electroactive Polymer Actuators and Devices (EAPAD) 2009
Yoseph Bar-Cohen; Thomas Wallmersperger, Editor(s)

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