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Organic-Inorganic Nanocomposite Electrodes for Dielectric Elastomer Actuator

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Abstract:

This study dealt with the Maxwell stress effect of waterborne polyurethane (WPU)/ conductive filler nanocomposite, which was a promising candidate for a material to be used in dielectric elastomer actuator electrode. Conductive nanocomposites were produced by using three types of conductive filler such as carbon black (CB), vapor grown carbon fiber (VGCF), and silver powder (Ag). Among them, conductive nanocomposite containing VGCF exhibited the lowest threshold concentration. And the blend of CB and VGCF (CB/VGCF) filler had a synergistic effect to electrical conductivity. Actuation test showed that CB/VGCF nanocomposite electrode had the largest displacement. Then it could be stated that the improvement of the displacement in CB/VGCF nanocomposite electrode was originated from the increase in relative dielectric constant. In addition, a unique feature of the hysteresis in the bending deformation was described. The feature is that the prior application of an electric field significantly improves the bending speed in the successive application.

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Periodical:

Key Engineering Materials (Volumes 336-338)

Pages:

323-326

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.336-338.323

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Online since:

April 2007

Authors:

Cheol Ho Kim, Hae Do Jung, Jang Oo Lee, Nam Ju Jo

Keywords:

Compliant Electrode, Dielectric Elastomer Actuator, Maxwell Stress Effect

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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