Issue 76, 2015

The enhanced electrocaloric effect in P(VDF-TrFE) copolymer with barium strontium titanate nano-fillers synthesized via an effective hydrothermal method

Abstract

An effective hydrothermal method is developed to synthesize barium strontium titanate (BST) nanoparticles with a mean size below 30 nm, which are used for the fabrication of nanocomposite films consisting of ferroelectric co-polymer poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) and ceramic nanoparticles. The interface between the nanoparticle and the polymeric matrix is found to improve the polarization and pyroelectric behaviors of the nanocomposites, resulting in a much enhanced electrocaloric effect as compared with that of the pristine P(VDF-TrFE). The electrocaloric temperature change is 2.5 °C under electric fields of ∼600 kV cm−1. The effects of Ba0.75Sr0.25TiO3 nanoparticles on the ferroelectric-to-paraelectric transition of P(VDF-TrFE) are investigated using dynamical mechanical relaxation. The results suggest that the improved electrocaloric effect in the nanocomposites could be related with the localized polarization field near the surfaces of Ba0.75Sr0.25TiO3 nanoparticles.

Graphical abstract: The enhanced electrocaloric effect in P(VDF-TrFE) copolymer with barium strontium titanate nano-fillers synthesized via an effective hydrothermal method

Article information

Article type
Paper
Submitted
03 Jun 2015
Accepted
10 Jul 2015
First published
10 Jul 2015

RSC Adv., 2015,5, 61946-61954

Author version available

The enhanced electrocaloric effect in P(VDF-TrFE) copolymer with barium strontium titanate nano-fillers synthesized via an effective hydrothermal method

Z. Y. Jiang, X. C. Zheng and G. P. Zheng, RSC Adv., 2015, 5, 61946 DOI: 10.1039/C5RA10508K

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