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Proceedings Paper

Elastomeric composites with high dielectric constant for use in Maxwell stress actuators
Author(s): Jeffrey P. Szabo; Johnathan A. Hiltz; Colin G. Cameron; Royale Suzanne Underhill; Jason Massey; Brian White; Jacob Leidner
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Paper Abstract

Electroactive polymer actuators that utilize the Maxwell stress effect have generated considerable interest in recent years for use in applications such as artificial muscles, sensors, and parasitic energy capture. In order to maximize performance, the dielectric layer in Maxwell stress actuators should ideally have a high dielectric constant and high dielectric breakdown strength. In this study, the effect of high dielectric constant fillers on the electrical and mechanical properties of thin elastomeric films was examined. The fillers studied included the inorganic compounds titanium dioxide (TiO2), barium titanate (BaTiO3), and lead magnesium niobate-lead titanate (Pb(Mg1/3Nb2/3)O3-PbTiO). A high dielectric constant filler based on a polymeric conjugated ligand-metal complex, poly(copper phthalocyanine), was also synthesized and studied. Maxwell stress actuators fabricated with BaTiO3 dispersed in a silicone elastomer matrix were evaluated and compared with unfilled systems. A model was presented which relates filler volume fraction to actuation stress, strain, and elastic energy density at fields below dielectric breakdown. The model and experimental results suggest that for the case of strong filler particle-elastomer matrix interaction, actuation strain decreases with increasing filler content.

Paper Details

Date Published: 28 July 2003
PDF: 11 pages
Proc. SPIE 5051, Smart Structures and Materials 2003: Electroactive Polymer Actuators and Devices (EAPAD), (28 July 2003); doi: 10.1117/12.484377
Show Author Affiliations
Jeffrey P. Szabo, Defence Research and Development Canada (Canada)
Johnathan A. Hiltz, Defence Research and Development Canada (Canada)
Colin G. Cameron, Defence Research and Development Canada (Canada)
Royale Suzanne Underhill, Defence Research and Development Canada (Canada)
Jason Massey, Bodycote Materials Testing Canada, Inc. (Canada)
Brian White, Bodycote Materials Testing Canada, Inc. (Canada)
Jacob Leidner, Bodycote Materials Testing Canada, Inc. (Canada)


Published in SPIE Proceedings Vol. 5051:
Smart Structures and Materials 2003: Electroactive Polymer Actuators and Devices (EAPAD)
Yoseph Bar-Cohen, Editor(s)

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