Enhanced electrocaloric effect in ferroelectric poly(vinylidene-fluoride/trifluoroethylene) 55/45 mol % copolymer at ferroelectric-paraelectric transition

2011 ◽  
Vol 98 (12) ◽  
pp. 122906 ◽  
Author(s):  
S. G. Lu ◽  
B. Rožič ◽  
Q. M. Zhang ◽  
Z. Kutnjak ◽  
Bret Neese
Keyword(s):  
Vinylidene Fluoride ◽  
Electrocaloric Effect ◽  
Poly Vinylidene Fluoride

Enhanced Electrocaloric Effect in Poly(vinylidene fluoride-trifluoroethylene)-based Composites

2013 ◽  
Vol 1490 ◽  
pp. 235-240
Author(s):  
Xiang-Zhong Chen ◽  
Xiao-Shi Qian ◽  
Xinyu Li ◽  
David Sheng-Guo Lu ◽  
Haiming Gu ◽  
...  
Keyword(s):  
Polymer Blends ◽  
Vinylidene Fluoride ◽  
Inorganic Nanoparticles ◽  
Relaxor Behavior ◽  
Electrocaloric Effect ◽  
Ferroelectric Relaxor ◽  
Poly Vinylidene Fluoride

ABSTRACTThe poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) based ferroelectric and relaxor materials have been proved to be good electrocaloric (EC) materials. To further enhance the EC effect in ferroelectric relaxor terpolymer poly(vinylidene fluoride–trifluoroethylene-chlorofluoroethylene) (P(VDF-TrFE-CFE)), composites such as polymer-polymer blends and nanocomposites filled with inorganic nanoparticles are fabricated and investigated. It is found that the addition of small amount of filler (such as P(VDF-TrFE) or nano-ZrO2) can increase terpolymer’s crystallinity and enhance its relaxor behavior through interface couplings. The increased crystallinity and enhanced relaxor behavior together result in enhanced electrocaloric effect. The results demonstrate the promise of composite approaches in tailoring and enhancing ECE in the relaxor terpolymers.

Enhanced electrocaloric effect in poly(vinylidene fluoride-trifluoroethylene)-based terpolymer/copolymer blends

2012 ◽  
Vol 100 (22) ◽  
pp. 222902 ◽  
Author(s):  
Xiang-zhong Chen ◽  
Xiao-shi Qian ◽  
Xinyu Li ◽  
S. G. Lu ◽  
Hai-ming Gu ◽  
...  
Keyword(s):  
Vinylidene Fluoride ◽  
Electrocaloric Effect ◽  
Copolymer Blends ◽  
Poly Vinylidene Fluoride

Direct measurement of the electrocaloric effect in poly(vinylidene fluoride-trifluoroethylene-chlorotrifluoroethylene) terpolymer films

2013 ◽  
Vol 103 (20) ◽  
pp. 202904 ◽  
Author(s):  
Vittorio Basso ◽  
Florence Russo ◽  
Jean-François Gerard ◽  
Sébastien Pruvost
Keyword(s):  
Direct Measurement ◽  
Vinylidene Fluoride ◽  
Electrocaloric Effect ◽  
Poly Vinylidene Fluoride

Piezoelectric β-polymorph formation of new textiles by surface modification with coating process based on interfacial interaction on the conformational variation of poly (vinylidene fluoride) (PVDF) chains

2020 ◽  
Vol 91 (3) ◽  
pp. 31301
Author(s):  
Nabil Chakhchaoui ◽  
Rida Farhan ◽  
Meriem Boutaldat ◽  
Marwane Rouway ◽  
Adil Eddiai ◽  
...  
Keyword(s):  
High Efficiency ◽  
Vinylidene Fluoride ◽  
Research Work ◽  
Research Area ◽  
Interfacial Interaction ◽  
Tetraethyl Orthosilicate ◽  
Poly Vinylidene Fluoride ◽  
Carbon Nanofillers ◽  
The Impact ◽  
Advanced Applications

Novel textiles have received a lot of attention from researchers in the last decade due to some of their unique features. The introduction of intelligent materials into textile structures offers an opportunity to develop multifunctional textiles, such as sensing, reacting, conducting electricity and performing energy conversion operations. In this research work nanocomposite-based highly piezoelectric and electroactive β-phase new textile has been developed using the pad-dry-cure method. The deposition of poly (vinylidene fluoride) (PVDF) − carbon nanofillers (CNF) − tetraethyl orthosilicate (TEOS), Si(OCH2CH3)4 was acquired on a treated textile substrate using coating technique followed by evaporation to transform the passive (non-functional) textile into a dynamic textile with an enhanced piezoelectric β-phase. The aim of the study is the investigation of the impact the coating of textile via piezoelectric nanocomposites based PVDF-CNF (by optimizing piezoelectric crystalline phase). The chemical composition of CT/PVDF-CNC-TEOS textile was detected by qualitative elemental analysis (SEM/EDX). The added of 0.5% of CNF during the process provides material textiles with a piezoelectric β-phase of up to 50% has been measured by FTIR experiments. These results indicated that CNF has high efficiency in transforming the phase α introduced in the unloaded PVDF, to the β-phase in the case of nanocomposites. Consequently, this fabricated new textile exhibits glorious piezoelectric β-phase even with relatively low coating content of PVDF-CNF-TEOS. The study demonstrates that the pad-dry-cure method can potentially be used for the development of piezoelectric nanocomposite-coated wearable new textiles for sensors and energy harvesting applications. We believe that our study may inspire the research area for future advanced applications.

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