High performance electromechanical actuators based on ionic liquid/poly(vinylidene fluoride)

J. C. Dias, A. C. Lopes, B. Magalhães, G. Botelho, M. M. Silva, J. M S S Esperança, S. Lanceros-Mendez

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)

Abstract

Due to the increasing need of low voltage actuators, independent from electrochemical processes, electroactive actuators based on poly(vinylidene fluoride) composites with 10, 25 and 40% of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [C2mim] [NTf2], ionic liquid are prepared by solvent casting and melting. We show that the charge structure of [C2mim] [NTf2] induces the complete piezoelectric β-phase crystallization of the PVDF within the composite and decreases its crystallinity fraction significantly. [C2mim] [NTf2] also works as a plasticizer of PVDF, reducing the elastic modulus down to 12% of the initial value. Moreover, the composites show significant displacement and bending under applied voltages of 2, 5 and 10 Vpp. The displacement and bending of the composite membranes are also evaluated as a function of [C2mim] [NTf2] content and sample thickness. Increasing amounts of ionic liquid result in larger deformations independently of the applied voltage.

Original languageEnglish
Pages (from-to)199-205
Number of pages7
JournalPolymer Testing
Volume48
DOIs
Publication statusPublished - 1 Dec 2015

Keywords

  • Actuators
  • Ionic liquids
  • PVDF
  • Sensors

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