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A High-Modulus Electroactive Polymer Acting as a Robust Ionomer for Ionic Micro-Actuators

Published online by Cambridge University Press:  22 February 2012

Gokhan Hatipoglu ,
Yang Liu ,
Ran Zhao ,
Mitra Yoonessi ,
Dean M. Tigelaar ,
Srinivas Tadigadapa  and
Q. M. Zhang
Gokhan Hatipoglu
Affiliation:
Department of Electrical Engineering, Pennsylvania State University, University Park, PA 16802, USA
Yang Liu
Affiliation:
Department of Electrical Engineering, Pennsylvania State University, University Park, PA 16802, USA
Ran Zhao
Affiliation:
Department of Electrical Engineering, Pennsylvania State University, University Park, PA 16802, USA
Mitra Yoonessi
Affiliation:
Ohio Aerospace Institute, Cleveland OH, USA NASA Glenn Research Center, Cleveland, OH 44135, USA
Dean M. Tigelaar
Affiliation:
Ohio Aerospace Institute, Cleveland OH, USA NASA Glenn Research Center, Cleveland, OH 44135, USA
Srinivas Tadigadapa
Affiliation:
Department of Electrical Engineering, Pennsylvania State University, University Park, PA 16802, USA
Q. M. Zhang
Affiliation:
Department of Electrical Engineering, Pennsylvania State University, University Park, PA 16802, USA
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Abstract

A high modulus, sulfonated polymer synthesized from one-to-one ratio 4,6-bis(4-hydroxyphenyl)-N, N-diphenyl-1,3,5-triazin-2-amine and 4,4′-biphenol with bis(4-fluorophenyl) sulfone (DPA-PS:BP) is exploited as an ionomer for micro-ionic actuators. A unique and attractive feature of the ionomer is that it can contain high amounts of ionic liquid (IL) as an electrolyte while maintaining a high elastic modulus (i.e 600 MPa for 150 wt% uptake), which is more than one order of magnitude higher than the state-of-the-art of ionomers with working electrolytes. Such a high modulus makes it possible for the ionomer to be fabricated into micro-actuators with high uptake of ILs and low operation voltage (< 4 V), in various free standing forms with ion milling techniques, which are attractive for MEMS applications. As an initial demonstration of a DPA-PS:BP based ionic micro-actuator, a cantilever (200 μm x 33 μm x 5 μm) is manufactured by Focused Ion Beam (FIB) and characterized. Under the voltage of 1.6 V, the bending actuator exhibits an intrinsic strain from the active ionomer of 1.1% and a corresponding blocking force of 27 μN.

Keywords

ionic conductoractuatormicroelectro-mechanical (MEMS)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1403: Symposium V – Multifunctional Polymer-Based Materials , 2012 , mrsf11-1403-v12-28
Copyright
Copyright © Materials Research Society 2012

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References

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