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Proceedings Article

New DEA materials by organic modification of silicone and polyurethane networks

[+] Author Affiliations
Björn Kussmaul, Michael Wegener, Martin Bluemke, Hartmut Krueger

Fraunhofer-Institut für Angewandte Polymerforschung (Germany)

Sebastian Risse

Univ. Potsdam (Germany)

Jens Krause, Joachim Wagner, Torsten Feller, Karin Clauberg, Julia Hitzbleck

Bayer MaterialScience AG (Germany)

Reimund Gerhard

The Univ. of Potsdam (Germany)

Proc. SPIE 8687, Electroactive Polymer Actuators and Devices (EAPAD) 2013, 86872S (April 9, 2013); doi:10.1117/12.2009102
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From Conference Volume 8687

  • Electroactive Polymer Actuators and Devices (EAPAD) 2013
  • Yoseph Bar-Cohen
  • San Diego, California, USA | March 10, 2013

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 for polyurethane and silicone films. The silicone network contains polydimethylsiloxane (PDMS) chains, as well as cross-linker and grafted molecular dipoles in varying amounts. The process leads to films, which are homogenous down to the molecular level and show higher permittivities as well as reduced stiffnesses. The dipole modification of a new silicone leads to 40 times higher sensitivities, compared to the unmodified films. This new material reaches the sensitivity of the widely used acrylate elatomer VHB4905. A similar silicone modification was obtained by using smart fillers consisting of organic dipoles and additional groups realizing a high compatibility to the silicon network. Polyurethanes are alternative elastomers for DEAs which are compared with the silicones in important properties. Polyurethanes have an intrinsically high dielectric constant (above 7), which is based on the polar nature of the polyurethane fragments. Polyurethanes can be made in roll-to-roll process giving constant mechanical and electrical properties on a high level. © (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Björn Kussmaul ; Sebastian Risse ; Michael Wegener ; Martin Bluemke ; Jens Krause, et al.
" New DEA materials by organic modification of silicone and polyurethane networks ", Proc. SPIE 8687, Electroactive Polymer Actuators and Devices (EAPAD) 2013, 86872S (April 9, 2013); doi:10.1117/12.2009102; http://dx.doi.org/10.1117/12.2009102


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