Brillouin scattering studies of poly(vinylidene fluoride) films subject to uniaxial stretching

1981 ◽  
Vol 19 (6) ◽  
pp. 941-950 ◽  
Author(s):  
C. H. Wang ◽  
David B. Cavanaugh ◽  
Y. Hagashigaki
Keyword(s):  
Vinylidene Fluoride ◽  
Brillouin Scattering ◽  
Uniaxial Stretching ◽  
Poly Vinylidene Fluoride

In situ SAXS/WAXS investigation of the structural evolution of poly(vinylidene fluoride) upon uniaxial stretching

Polymer ◽  
2016 ◽  
Vol 84 ◽  
pp. 148-157 ◽  
Author(s):  
Juliette Defebvin ◽  
Sophie Barrau ◽  
Grégory Stoclet ◽  
Cyrille Rochas ◽  
Jean-Marc Lefebvre
Keyword(s):  
Vinylidene Fluoride ◽  
Structural Evolution ◽  
Uniaxial Stretching ◽  
Poly Vinylidene Fluoride

Role of poly(lactic acid) in the phase transition of poly(vinylidene fluoride) under uniaxial stretching

2012 ◽  
Vol 129 (4) ◽  
pp. 1686-1696 ◽  
Author(s):  
Qi Xie ◽  
Kai Ke ◽  
Wen-Rou Jiang ◽  
Wei Yang ◽  
Zheng-Ying Liu ◽  
...  
Keyword(s):  
Phase Transition ◽  
Lactic Acid ◽  
Vinylidene Fluoride ◽  
Poly Lactic Acid ◽  
Uniaxial Stretching ◽  
Poly Vinylidene Fluoride

scholarly journals Preparation of efficient piezoelectric PVDF–HFP/Ni composite films by high electric field poling

2022 ◽  
Vol 11 (1) ◽  
pp. 452-462
Author(s):  
Dan Lei ◽  
Ning Hu ◽  
Liangke Wu ◽  
Rongyi Huang ◽  
Alamusi Lee ◽  
...  
Keyword(s):  
Electric Field ◽  
Vinylidene Fluoride ◽  
Composite Films ◽  
High Electric Field ◽  
Ni Nanoparticles ◽  
Scanning Calorimetry ◽  
Uniaxial Stretching ◽  
Poly Vinylidene Fluoride ◽  
Electric Field Poling ◽  
Pure Pvdf

Abstract Poly(vinylidene fluoride) (PVDF) and its copolymers have been widely studied due to their excellent piezoelectricity and ferroelectricity. In this study, composite films are prepared by adding Ni nanoparticles (0.00–0.3 wt%) into poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF–HFP) matrix by solution casting, uniaxial stretching, and high electric field poling. It is found that when the maximum electric field E max for poling is 130 MV m−1, the calibrated open circuit voltage of the pure PVDF–HFP films reaches 3.12 V, which is much higher than those poled by a lower electric field (70 MV m−1: 1.40 V; 90 MV m−1: 2.29 V). This result shows that the effect of poling on the generated output voltage is decisive. By adding 0.1 wt% Ni nanoparticles, it increases to 3.84 V, 23% higher than that of the pure PVDF–HFP films. To further understand the enhancement mechanism, the effects of Ni nanoparticles on initial crystallization, uniaxial stretching, and high electric field poling are investigated by X-ray diffraction, scanning electron microscope, Fourier transform infrared spectroscopy, and differential scanning calorimetry.

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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