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The enhancement effect of lithium ions on actuation performance of ionic liquid-based IPMC soft actuators

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Date
12/10/2015
Author
Safari, Maryam
Naji, Leila
Baker, Richard
Taromi, Faramarz Afshar
Keywords
Artificial muscle
IPMC actuator
Displacement measurements
Cyclic voltammetery
Impedance spectroscopy
QD Chemistry
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Abstract
Abstract Soft actuators are of great technological interest and one class of these is made from ionic polymer-metal composites (IPMCs). It has been established that replacement of water with an ionic liquid (IL) in IPMCs results in larger actuation response and considerably longer operating life. However, the rate of displacement of IL-based IPMCs is very low. In the current work, IPMC actuators were fabricated using Nafion membrane and an imidazolium-based IL. The effects of incorporating the IL with and without Li+ ions were followed using electromechanical and electrochemical measurements and were compared with the corresponding behavior of water-based Li+-exchanged and un-exchanged IPMC actuators. The addition of Li+ ions to the IL-based system resulted in dramatic increases in the capacitance, ionic conduction, operating life and in the displacement rate of the actuator. This strategy is of considerable interest for enabling the use of IPMC-based soft actuators in medicine and robotics.
Citation
Safari , M , Naji , L , Baker , R & Taromi , F A 2015 , ' The enhancement effect of lithium ions on actuation performance of ionic liquid-based IPMC soft actuators ' , Polymer , vol. 76 , pp. 140-149 . https://doi.org/10.1016/j.polymer.2015.09.004
Publication
Polymer
Status
Peer reviewed
DOI
https://doi.org/10.1016/j.polymer.2015.09.004
ISSN
0032-3861
Type
Journal article
Rights
Copyright © 2015 Published by Elsevier Ltd. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://dx.doi.org/10.1016/j.polymer.2015.09.004
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  • University of St Andrews Research
URL
http://www.sciencedirect.com/science/article/pii/S0032386115302093#appd001
URI
http://hdl.handle.net/10023/9432

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