Stronger multilayer acrylic dielectric elastomer actuators with silicone gel coatings
Foong, Ervin Sheng-Wei
Date of Issue2016
School of Mechanical and Aerospace Engineering
Singapore Centre for 3D Printing
Multilayer dielectric elastomer actuators (DEA) perform worst off than single-layer DEAs due to higher susceptibility to electro-thermal breakdown. This paper presents a hot-spot model to predict the electro-thermal breakdown field of DEAs and its dependence on thermal insulation. To inhibit the electrothermal breakdown, silicone gel coating was applied as barrier coating to multilayer acrylic DEA. The gel coating helps suppress the electro-thermally induced puncturing of DEA membrane at the hot spot. As a result, the gel-coated DEAs, in either a single layer or a multilayer stack, can produce 30% more isometric stress change as compared to those none-coated. These gel-coated acrylic DEAs show great potential to make stronger artificial muscles.
Dielectric elastomer actuators
Smart Materials and Structures
© 2016 IOP Publishing Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Smart Materials and Structures, IOP Publishing Ltd. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1088/0964-1726/25/12/125006].