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Polymers 2018, 10(7), 714; https://doi.org/10.3390/polym10070714

Significantly Enhanced Electromechanical Performance of PDMS Crosslinked PVDF Hybrids

Department of Materials Chemistry, School of Science, Xi’an Key Laboratory of Sustainable Energy Materials Chemistry, Xi’an Jiaotong University, No. 28 Xianning West Road, Xi’an 710049, China
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Received: 14 June 2018 / Revised: 22 June 2018 / Accepted: 28 June 2018 / Published: 29 June 2018
(This article belongs to the Special Issue Polymer Hybrids and Composites)
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Abstract

Poly(vinylidene fluoride)-based ferroelectric polymers have large and tunable dielectric permittivity (εr), but rather high Young’s modulus (Y), which limits its electromechanical response when used as actuators. In this work, a silicone oligomer involving amino groups is employed to crosslink a non-crystallized poly(vinylidene fluoride-chlorotrifluoroethylene) matrix bearing double bonds (P(VDF-CTFE-DB)) via addition reaction. Thanks to the flexible silicone molecules, the modulus of the hybrids is reduced over 30% when compared with the pristine matrix. Most interestingly, the εr of the hybrids is improved to nearly 100% higher than that of the matrix when the silicone content reaches 30 wt %. This may be due to the dilution effect of silicone molecules, which favors macromolecular chain rearrangement and dipole orientation of the hybrids under an applied electric field. As a result, electric-field activated displacements of the above hybrid increases to 0.73 mm from 0.48 mm of the matrix under 60 MV/m. The maximum electric field-induced thickness strain increases from 1% of the matrix to nearly 3% of the crosslinked hybrid. This work may provide a facile strategy to fabricate PVDF-based hybrids with enhanced electromechanical performance under low activating voltage. View Full-Text
Keywords: PVDF-based polymers; electromechanical performance; silicone crosslinked hybrid; electroactive polymers; ferroelectric polymers PVDF-based polymers; electromechanical performance; silicone crosslinked hybrid; electroactive polymers; ferroelectric polymers
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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He, D.; Xie, Y.; Wang, X.; Zhang, Z. Significantly Enhanced Electromechanical Performance of PDMS Crosslinked PVDF Hybrids. Polymers 2018, 10, 714.

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