Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/70487
Title: | Exceptionally high negative electro-caloric effects of poly(VDF-co-trFE) based nanocomposites tuned by the geometries of barium titanate nanofillers | Authors: | Jiang, ZY Zheng, GP Zheng, XC Wang, H |
Issue Date: | 2017 | Source: | Polymers, Aug. 2017, v. 9, no. 8, 315, p. 1-11 | Abstract: | Exceptionally high electro-caloric effects (ECEs) are observed in nanocomposites consisting of poly(vinylidene fluoride-co-trifluoroethylene) (VDF-co-TrFE) copolymer and barium titanate (BT) nanoparticles and nanowires. The poly(VDF-co-TrFE) matrix nanocomposites containing 5% volume fraction of BT nanowires are found to exhibit a negative ECE temperature change as large as 12 degrees C or a refrigeration effect of 8.3 J/g, which is much larger than those reported to date. The mechanisms of negative ECE and the enhanced negative ECE in the nanocomposites consisting of poly(VDF-co-TrFE) and BT nanowires are explained by the Kauzmann theory on glassy polar states and the interaction between BT nanofillers and the copolymer matrix. The effects of geometries of BT nanofillers on the negative ECEs are elucidated by P-E loop measurements, and dielectric and dynamical mechanical analyses. The nanocomposites, with their enhanced negative ECE tuned by the geometries of BT nanofillers, provide us with promising ECE refrigerants for practical application to small-sized and environmentally-friendly ECE coolers in the heat management of electronic devices. | Keywords: | Ferroelectric polymers Phase transition Electro-caloric effect Nanofillers Nanocomposites Dielectric properties Mechanical relaxation |
Publisher: | Molecular Diversity Preservation International (MDPI) | Journal: | Polymers | ISSN: | 2073-4360 | DOI: | 10.3390/polym9080315 | Rights: | © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). The following publication Jiang, Z. Y., Zheng, G. P., Zheng, X. C., & Wang, H. (2017). Exceptionally high negative electro-caloric effects of poly(VDF-co-trFE) based nanocomposites tuned by the geometries of barium titanate nanofillers. Polymers, 9(8), (Suppl. ), 315, - is available athttps://dx.doi.org/10.3390/polym9080315 |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Jiang_Negative_Electro-caloric_Poly(VDF-co-trFE).pdf | 5.65 MB | Adobe PDF | View/Open |
Page views
64
Last Week
1
1
Last month
Citations as of Apr 14, 2024
Downloads
46
Citations as of Apr 14, 2024
SCOPUSTM
Citations
13
Citations as of Apr 19, 2024
WEB OF SCIENCETM
Citations
12
Last Week
0
0
Last month
Citations as of Apr 18, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.