9 April 2013 Very high breakdown field strength for dielectric elastomer actuators quenched in dielectric liquid bath
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Abstract
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.
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Thanh-Giang La, Gih-Keong Lau, "Very high breakdown field strength for dielectric elastomer actuators quenched in dielectric liquid bath", Proc. SPIE 8687, Electroactive Polymer Actuators and Devices (EAPAD) 2013, 86871R (9 April 2013); doi: 10.1117/12.2009989; https://doi.org/10.1117/12.2009989
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