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Proceedings Paper

Self-clearing dielectric elastomer actuators using charcoal-powder electrodes
Author(s): Gih-Keong Lau; Soo-Lim Chua; Li-Lynn Shiau; Adrian Wei Yee Tan
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Paper Abstract

This study found that compliant electrodes using charcoal powder enable self clearing property to dielectric elastomer actuator. Charcoal powder is applied as compliant electrodes by smearing on a 100% bi-axially pre-stretched dielectric elastomer membrane (VHB 9473), with nominal pre-stretched thickness of 62.3 μm. This DEA using charcoal-powder electrodes can sustain up 10 kV without terminal breakdown, while those using graphite or silver grease break down at slightly above 2 kV. It is noted that this DEA using charcoal-powder has maximum areal strain at about 45 % at 4 kV, beyond which the strain does not increase further for reduced electrical conductivity. The dielectric elastomer actuator using the charcoal-powder electrodes generate less actuation strain than that using the graphite. However, the former can produce a large actuation stress as it can driven to a higher driving voltage without pre-mature breakdown.

Paper Details

Date Published: 3 April 2012
PDF: 8 pages
Proc. SPIE 8340, Electroactive Polymer Actuators and Devices (EAPAD) 2012, 834016 (3 April 2012); doi: 10.1117/12.915493
Show Author Affiliations
Gih-Keong Lau, Nanyang Technological Univ. (Singapore)
Soo-Lim Chua, Nanyang Technological Univ. (Singapore)
Li-Lynn Shiau, Nanyang Technological Univ. (Singapore)
Adrian Wei Yee Tan, Nanyang Technological Univ. (Singapore)

Published in SPIE Proceedings Vol. 8340:
Electroactive Polymer Actuators and Devices (EAPAD) 2012
Yoseph Bar-Cohen, Editor(s)

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