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Proceedings Paper

Mechanical and electrical properties of electroactive papers and its potential application
Author(s): Jaehwan Kim; Woochul Jung; William Craft; John Shelton; Kyo D. Song; Sang H. Choi
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Paper Abstract

This paper focuses on the mechanical and electrical characteristics of electro-active paper (EAPap) as a bio-inspired actuator and the potential use of these actuators in some specific applications. EAPap can undergo a large bending displacement at a relatively low voltage under low power consumption in dry conditions. EAPap samples as tested are made from chemically treated cellulose paper. When an electrical field is applied to the electrodes, a “bending displacement” is produced as the material tends to deform into a constant curvature coil. However, the EAPap is a complex anisotropic material, which has not been extensively characterized and additional basic and design testing is required before developing application devices from EAPap. Mechanical properties of selected EAPap materials along three material axes are addressed. EAPap material exhibits two distinct elastic constants connected by a bifurcation point along the stress strain diagram. The initial Young’s modulus of EAPap is in the range of 5-8GPa, -- quite high compared to other polymer materials. The thermo-mechanical analysis of EAPap is investigated to determine such factors as the degree of dimensional change due to dehydration and the maximum use temperature. Fatigue test identifies critical properties of this under-analyzed class of materials to provide a measure of its fatigue capabilities. The Electrical impedance analysis and dielectric property measurement with frequency are also important information that allows us to characterize the electrical behavior of EAPap. The performance of Eapap is measured in terms of tip displacement, blocking force and electrical power consumption. Through this series of tests, better understanding of the EAPap materials is obtained to researchers and designers interested in smart materials and EAP areas.

Paper Details

Date Published: 6 May 2005
PDF: 8 pages
Proc. SPIE 5759, Smart Structures and Materials 2005: Electroactive Polymer Actuators and Devices (EAPAD), (6 May 2005); doi: 10.1117/12.599032
Show Author Affiliations
Jaehwan Kim, Inha Univ. (South Korea)
Woochul Jung, Inha Univ. (South Korea)
William Craft, North Carolina A&T State Univ. (United States)
John Shelton, North Carolina A&T State Univ. (United States)
Kyo D. Song, Norfolk State Univ. (United States)
Sang H. Choi, NASA Langley Research Ctr. (United States)


Published in SPIE Proceedings Vol. 5759:
Smart Structures and Materials 2005: Electroactive Polymer Actuators and Devices (EAPAD)
Yoseph Bar-Cohen, Editor(s)

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