Nonlinear capacitance of ionic polymer-metal composites

Zheng Chen; Dawn Rochelle Hedgepeth; Xiaobo Tan

doi:10.1117/12.815792

6 April 2009 Nonlinear capacitance of ionic polymer-metal composites

Zheng Chen, Dawn Rochelle Hedgepeth, Xiaobo Tan

Proceedings Volume 7287, Electroactive Polymer Actuators and Devices (EAPAD) 2009; 728715 (2009) https://doi.org/10.1117/12.815792
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2009, San Diego, California, United States

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.

Citation Download Citation

Zheng Chen, Dawn Rochelle Hedgepeth, and Xiaobo Tan "Nonlinear capacitance of ionic polymer-metal composites", Proc. SPIE 7287, Electroactive Polymer Actuators and Devices (EAPAD) 2009, 728715 (6 April 2009); https://doi.org/10.1117/12.815792

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