Abstract
A bilayer (3×1 cm) formed by an electroactive material (polypyrrole) and an adherent, non conducting and flexible polymeric film works like a muscle. Polypyrrole swells and contract during oxidation or reduction. The molecular movement promotes asymmetric strains on the flexible layer which bends. When one of the ends is fixed the free end describes an angular movement of more than 180 degrees. The position depends on the applied potential (electropositioning). The movement rate can be controlled through the intensity of the current flow, the movement can be stopped at any point by stop of the current flow and reversed from any point by current inversion. Bilayers able to trail 200 times their weight along 180 degrees are described. Macroscopic models based on asymmetric strains through the flexible films and microscopic models based on molecular movements during oxidation and reduction are proposed.
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© 1993 Springer Science+Business Media Dordrecht
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Otero, T.F., Rodriguez, J. (1993). Electrochemomechanical and Electrochemopositioning Devices: Artificial Muscles. In: Aldissi, M. (eds) Intrinsically Conducting Polymers: An Emerging Technology. NATO ASI Series, vol 246. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-1952-0_17
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DOI: https://doi.org/10.1007/978-94-017-1952-0_17
Publisher Name: Springer, Dordrecht
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