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Proceedings Paper

Poly(3,4-ethylenedioxythiophene) actuators: the role of cation and anion choice
Author(s): Nathan A. Vandesteeg; Patrick A. Anquetil; Ian W. Hunter
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Paper Abstract

Poly(3,4-ethylenedioxythiophene), or PEDOT, freestanding films were synthesized and characterized as conducting polymer linear actuators. Variations of solvent and electrolyte led to the observation of strains greater than 4% with maximum strain rates of 0.2%/s during electrochemical interrogation in an ionic liquid environment. The ionic liquid 1,3-butylmethylimidazolium hexafluorophosphate, BMIMPF6, enabled the largest strains to be observed repeatedly while the polymer was held at a stress of 1.0MPa over tens of cycles. The ionic liquid environment also produced a single polarity in the relationship between charge and strain. This single polarity suggested that only the imidazolium cation was actively intercalating into and out of the polymer film. The possible sources and consequences of such a mechanism as compared to actuation in conventional solvents and electrolytes which show dual polarity of charge and strain is discussed.

Paper Details

Date Published: 27 July 2004
PDF: 8 pages
Proc. SPIE 5385, Smart Structures and Materials 2004: Electroactive Polymer Actuators and Devices (EAPAD), (27 July 2004); doi: 10.1117/12.540012
Show Author Affiliations
Nathan A. Vandesteeg, Massachusetts Institute of Technology (United States)
Patrick A. Anquetil, Massachusetts Institute of Technology (United States)
Ian W. Hunter, Massachusetts Institute of Technology (United States)


Published in SPIE Proceedings Vol. 5385:
Smart Structures and Materials 2004: Electroactive Polymer Actuators and Devices (EAPAD)
Yoseph Bar-Cohen, Editor(s)

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