Significantly Enhanced Electromechanical Performance of PDMS Crosslinked PVDF Hybrids
AbstractPoly(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
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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.
He D, Xie Y, Wang X, Zhang Z. Significantly Enhanced Electromechanical Performance of PDMS Crosslinked PVDF Hybrids. Polymers. 2018; 10(7):714.Chicago/Turabian Style
He, Dan; Xie, Yunchuan; Wang, Xiao; Zhang, Zhicheng. 2018. "Significantly Enhanced Electromechanical Performance of PDMS Crosslinked PVDF Hybrids." Polymers 10, no. 7: 714.
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