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3 April 2012 Effect of Janus particles as filler materials for acrylate-based dielectric elastomers
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Dielectric electroactive polymers respond to an applied electric field by deformation as described by the Maxwell effect. The response depends on the polymers' dielectric constant and stiffness. Addition of a high dielectric filler material has been shown to enhance the strain response. We report preliminary results on the enhancement of p(EGPEA) polymer films by addition of 1 w/v% of gold-capped, 500 nm SiO2 Janus particles (JP-SiO2). In comparison to pure p(EGPEA) and p(EGPEA) filled with unmodified SiO2 particles, JP-SiO2 p(EGPEA) films show an up to 24 times enhanced response. Measurement of the relative dielectric constant and the Young's Modulus indicate that the Janus particle additive increases the relative dielectric constant of the films, while at the same time decreasing the Young's Modulus leading to an overall larger electrostrictive coefficient for the JP-SiO2 p(EGPEA) films.
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Hsin-yu Chen, Ashok J. Maliakal, and Ilona Kretzschmar "Effect of Janus particles as filler materials for acrylate-based dielectric elastomers", Proc. SPIE 8340, Electroactive Polymer Actuators and Devices (EAPAD) 2012, 83402W (3 April 2012);

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