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Title: Inhibiting electro-thermal breakdown of acrylic dielectric elastomer actuators by dielectric gel coating
Authors: La, Thanh-Giang
Lau, Gih-Keong
Keywords: Mechanical and Aerospace Engineering
Issue Date: 2016
Source: La, T.-G., & Lau, G.-K. (2016). Inhibiting electro-thermal breakdown of acrylic dielectric elastomer actuators by dielectric gel coating. Applied Physics Letters, 108(1), 012903-.
Series/Report no.: Applied Physics Letters
Abstract: Electrical breakdown of dielectricelastomer actuators (DEA) is very localized; a spark and a pinhole (puncture) in dielectric ends up with short-circuit. This letter shows that prevention of electrothermal breakdown helps defer failure of DEAs even with conductive-grease electrodes.Dielectricgel encapsulation or coating (Dow Corning 3-4170) helps protect acrylic elastomer (VHB 4905), making it thermally more stable and delaying its thermal oxidation (burn) from 218 °C to 300 °C. Dielectric-gel-coated acrylic DEAs can withstand higher local leak-induced heating and thus achieve higher dielectric strengths than non-coated DEAs do.
ISSN: 0003-6951
DOI: 10.1063/1.4939550
Schools: School of Mechanical and Aerospace Engineering 
Rights: © 2016 AIP Publishing LLC. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The published version is available at: []. 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.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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