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Proceedings Paper

Novel DEA materials by chemical grafting of silicone networks on molecular level
Author(s): Björn Kussmaul; Sebastian Risse; Michael Wegener; Guggi Kofod; Hartmut Krüger
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Paper Abstract

Dielectric elastomer actuators (DEAs) can be optimized by modifying the dielectric or mechanical properties of the electroactive polymer. In this work both properties were improved simultaneously by a simple process, the one-step film formation. The silicone elastomer network contains polydimethylsiloxane (PDMS) chains, as well as crosslinker and grafted molecular dipoles in varying amounts. This leads to films, which are homogenous down to the molecular level. Films with higher permittivity and reduced stiffness were obtained. As matrix two PDMS-materials with different molar masses, leading to other network chain lengths, were compared. This directly influences the network density and thus the mechanical properties. A higher electrical field response for long chain matrix materials was found. The actuation sensitivities for both materials were enhanced by 6.3 and 4.6 times for the short and long chain matrix material, respectively.

Paper Details

Date Published: 3 April 2012
PDF: 9 pages
Proc. SPIE 8340, Electroactive Polymer Actuators and Devices (EAPAD) 2012, 83400Y (3 April 2012); doi: 10.1117/12.914773
Show Author Affiliations
Björn Kussmaul, Fraunhofer-Institut für Angewandte Polymerforschung (Germany)
Sebastian Risse, Univ. Potsdam (Germany)
Michael Wegener, Fraunhofer-Institut für Angewandte Polymerforschung (Germany)
Guggi Kofod, Univ. Potsdam (Germany)
Hartmut Krüger, Fraunhofer-Institut für Angewandte Polymerforschung (Germany)

Published in SPIE Proceedings Vol. 8340:
Electroactive Polymer Actuators and Devices (EAPAD) 2012
Yoseph Bar-Cohen, Editor(s)

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