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Proceedings Paper

Self healing properties of Cu-Pt coated ionic polymer actuators
Author(s): Urmas Johanson; Andres Punning; Maarja Kruusmaa; Alvo Aabloo
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Paper Abstract

Composite actuators consisting of sheets of the solid polymer electrolyte (similar to Nafion(R)) with Cu2+ counter-ions inserted and coated with platinum and copper metal layers (so-called Ionomeric Polymer-Metal Composites; IPMCs) have been synthesised and their electromechanical performance upon actuation has been monitored. Resistance measurements on the electrodes show that the electrical conductivity of the membranes metal surface increases on the cathode side during the actuation process, contradictory to the situation when Cu is absent from the metal coating. This phenomenon is explained by the subsequent reduction of Cu2+ ions on the cathode upon actuation; Cu layer growth in this side prevents it from cracking and decreases its electrode resistance. The phenomenon opens up for longer life-times for Cu-based IPMCs. However, additional problems with Cu layer oxidation and Cu dendrite growth on the electrodes should be considered.

Paper Details

Date Published: 10 April 2008
PDF: 11 pages
Proc. SPIE 6927, Electroactive Polymer Actuators and Devices (EAPAD) 2008, 69271Y (10 April 2008); doi: 10.1117/12.775770
Show Author Affiliations
Urmas Johanson, Tartu Univ. (Estonia)
Andres Punning, Tartu Univ. (Estonia)
Maarja Kruusmaa, Tartu Univ. (Estonia)
Alvo Aabloo, Tartu Univ. (Estonia)

Published in SPIE Proceedings Vol. 6927:
Electroactive Polymer Actuators and Devices (EAPAD) 2008
Yoseph Bar-Cohen, Editor(s)

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