Very high breakdown field strength for dielectric elastomer actuators quenched in dielectric liquid bath

Thanh-Giang La; Gih-Keong Lau

doi:10.1117/12.2009989

9 April 2013 Very high breakdown field strength for dielectric elastomer actuators quenched in dielectric liquid bath

Thanh-Giang La, Gih-Keong Lau

Proceedings Volume 8687, Electroactive Polymer Actuators and Devices (EAPAD) 2013; 86871R (2013) https://doi.org/10.1117/12.2009989
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2013, San Diego, California, United States

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.

Citation Download Citation

Thanh-Giang La and 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); https://doi.org/10.1117/12.2009989

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