3 April 2012 How to improve electrochemomechanical strain in conducting polymers
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We have been studying electrochemomechanical deformation (ECMD) of conducting polymers to realize artificial muscles or soft actuators, since 1992. For the practical application, i.e., strain, stress, response time, cycle stability and creep have to be improved to levels of demands. In this paper, some attempts to improve the strain are mentioned for polyaniline, polypyrrole and poly(3,4-ethylenedioxythiophene), PEDOT. Especially, PEDOT actuator was found to show novel features in ECMD under tensile loads. The actuation was driven by cation insertion upon reduction in any combination of electrolytes and solvents. Another interesting feature was that the actuation under tensile loads showed larger strain than that without tensile loads. These facts were explained with a model of helical confinement of anions during the electrodeposition and uniaxial alignment of helices by the electrochemical creep under tensile loads.
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Keiichi Kaneto, Kohei Takayanagi, Kazuo Tominaga, Wataru Takashima, "How to improve electrochemomechanical strain in conducting polymers", Proc. SPIE 8340, Electroactive Polymer Actuators and Devices (EAPAD) 2012, 83400K (3 April 2012); doi: 10.1117/12.917879; https://doi.org/10.1117/12.917879

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