Enhanced electromechanical response of ionic polymer actuators by improving mechanical coupling between ions and polymer matrix

Yang Liu, Mehdi Ghaffari, Ran Zhao, Jun Hong Lin, Minren Lin, Q. M. Zhang

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

Poly[(vinylidene difluoride)-co-(chlorotrifluoroethylene)] (P(VDF-CTFE)) and P(VDF-CTFE)/poly(methyl methacrylate) (PMMA) cross-linked blends were exploited as ionic electroactive polymer (i-EAP) actuators with electrolyte ionic liquid 1-ethyl-3-methylimidazolium trifluoromethanesulfonate [C 2mim][TfO] for the first time. Compared to the traditional i-EAPs that are based on Nafion or Aquivion (Hyflon) ionomers, i-EAP actuators made with P(VDF-CTFE) and P(VDF-CTFE)/PMMA polymers exhibited remarkably enhanced actuation strain and significantly reduced electrical capacitance. The increase in the strain-charge ratio ε/C indicates that this improvement is a direct result of improved elastic coupling between the [C 2mim][TfO] electrolyte and the polymer matrix. As a result, an order-of-magnitude improvement in electromechanical energy conversion efficiency is achieved for both P(VDF-CTFE) and P(VDF-CTFE)/PMMA polymer-based actuators, which makes them promising polymer matrices for i-EAP actuators.

Original languageEnglish (US)
Pages (from-to)5128-5133
Number of pages6
JournalMacromolecules
Volume45
Issue number12
DOIs
StatePublished - Jun 26 2012

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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