Very high breakdown field strength for dielectric elastomer actuators quenched in dielectric liquid bath
Date of Issue2013
Electroactive Polymer Actuators and Devices (2013 : San Francisco, USA)
School of Mechanical and Aerospace Engineering
Dielectric elastomer actuators (DEAs) are prone to failure by pull-in instability. However, this work showed that DEAs, which were immersed in a silicone oil bath (Dow Corning Fluid 200 50cSt), can survive the pull-instability and operates beyond the pull-in voltage. Membrane DEAs (VHB 4905), which were pre-stretched bi-axially at 200% strain and immersed in the oil bath, survived a very high eld strength (>800 MV/m) and demonstrated areal strains up to 140%. The dielectric strength, achieved in the immersion, is approximately two times larger than that in the air (450 MV/m). This is achieved because the dielectric liquid bath helps to quench the localized electrical breakdown, which would have discharged sparks and burnt the dielectric lm in the air .
DRNTU::Engineering::Chemical engineering::Polymers and polymer manufacture
© 2013 (SPIE). This paper was published in Conference Proceedigns of Electroactive Polymer Actuators and Devices (EAPAD) 2013 and is made available as an electronic reprint (preprint) with permission of SPIE. The paper can be found at the following official DOI: [http://dx.doi.org/10.1117/12.2009989]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.