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on the relationship between the electric double layer and actuation in ionomeric polymer transducers

Published online by Cambridge University Press:  01 February 2011

Barbar J. Akle  and
Donald J. Leo
Barbar J. Akle
Affiliation:
Center for Intelligent Material Systems and Structures (CIMSS) Department of Mechanical Engineering Virginia Tech, 310 Durham Hall Blacksburg, VA 24061, U.S.A.
Donald J. Leo
Affiliation:
Center for Intelligent Material Systems and Structures (CIMSS) Department of Mechanical Engineering Virginia Tech, 310 Durham Hall Blacksburg, VA 24061, U.S.A.
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Abstract

Ionic polymer transducers are soft actuators that perform large bending deflections when voltages on the order of 1–5 V are applied across their thickness. Previous work showed that actuation performance of ionic polymer transducers is strongly correlated with the capacitance due to surface charge accumulation. Increasing the capacitance of the actuator increases the motion of the charges and increases the strain produced under the application of an electric field. Ionomeric transducers consist of an ionomer, such as Nafion (a product of DuPont), sandwiched between two high surface area electrodes. An electric double layer is formed on the interface between the cathode and the adsorbed positive ions. A novel plating technique which was previously developed is used to vary the morphology of the polymer-electrode interface to investigate the parameters of importance to the formation of the electric double layer. Electromechanical transducer tests are performed as a function of electrode morphology to correlate surface charge accumulation with the deflection generated by the transducer.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 855: Symposium W – Mechanically Active Materials , 2004 , W3.23
Copyright
Copyright © Materials Research Society 2005

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References

REFERENCES

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