High-temperature ferroelectric behaviors of poly(vinylidene fluoride-trifluoroethylene) copolymer ultrathin films with electroactive interlayers

2012 ◽  
Vol 111 (6) ◽  
pp. 064506 ◽  
Author(s):  
Ying Hou ◽  
Xiuli Zhang ◽  
Yuan Zhang ◽  
Guoqiang Xu ◽  
Haisheng Xu
Keyword(s):  
High Temperature ◽  
Ultrathin Films ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride

scholarly journals The Influence Mechanism of Temperature and Storage Period on Polarization Properties of Poly (Vinylidene Fluoride–Trifluoroethylene) Ultrathin Films

Membranes ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 301
Author(s):  
Xingjia Li ◽  
Zhi Shi ◽  
Xiuli Zhang ◽  
Xiangjian Meng ◽  
Zhiqiang Huang ◽  
...  
Keyword(s):  
Ultrathin Films ◽  
Remanent Polarization ◽  
Vinylidene Fluoride ◽  
Storage Period ◽  
Testing Temperature ◽  
Fatigue Properties ◽  
Inhibition Mechanism ◽  
Poly Vinylidene Fluoride ◽  
High Level ◽  
And Storage

The effect of testing temperature and storage period on the polarization fatigue properties of poly (vinylidene fluoride-trifluoroethylene) (P(VDF–TrFE)) ultrathin film devices were investigated. The experimental results show that, even after stored in air for 150 days, the relative remanent polarization (Pr/Pr(0)) of P(VDF–TrFE) of ultrathin films can keep at a relatively high level of 0.80 at 25 °C and 0.70 at 60 °C. To account for this result, a hydrogen fluoride (HF) formation inhibition mechanism was proposed, which correlated the testing temperature and the storage period with the microstructure of P(VDF–TrFE) molecular chain. Moreover, a theoretical model was constructed to describe the polarization fatigue evolution of P(VDF–TrFE) samples.

Temperature dependence of imprint mechanism in poly(vinylidene fluoride-trifluoroethylene) copolymer ultrathin films

2014 ◽  
Vol 104 (10) ◽  
pp. 103505 ◽  
Author(s):  
Xiuli Zhang ◽  
Xiaoli Du ◽  
Ying Hou ◽  
Zhaoyue Lü ◽  
Haisheng Xu
Keyword(s):  
Temperature Dependence ◽  
Ultrathin Films ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride

Numerical Study on the Interfacial Modification Effects of Soy Protein on Poly(Vinylidene Fluoride)

2019 ◽  
Author(s):  
Zhuoyuan Zheng ◽  
Chen Xin ◽  
Yumeng Li
Keyword(s):  
High Temperature ◽  
Soy Protein ◽  
Disulfide Bonds ◽  
Vinylidene Fluoride ◽  
Numerical Study ◽  
Protein Molecule ◽  
Heat Denaturation ◽  
Β Phase ◽  
Poly Vinylidene Fluoride ◽  
Underlying Mechanisms

Abstract The application of bio-degradable green materials is a rising global trend during the past decades for the sake of environment protection and sustainable development. Soy protein-based biomaterial is a promising candidate to replace the petroleum-based synthetic materials and was proved to be an effective functional modifier for polymers from our previous studies. Molecular dynamic (MD) simulation is implemented in this study to provide insights in understanding the underlying mechanisms. 11S molecule is chosen as a representative of soy protein, and three different denaturation processes are applied, including heat denaturation at two temperatures and the breaking of disulfide bonds. It is observed that by controlling the denaturation conditions, the hydrophobicity of the protein molecule is manipulated: high temperature denaturation can increase the exposed area of hydrophilic residues; whereas, by breaking the disulfide bonds, the hydrophobic residues of the molecules can be largely exposed. Besides, the mechanisms of using protein as functional modifier to tune the structures of the hydrophobic Poly(vinylidene fluoride) (PVDF) polymer (amorphous and β-crystal phases) are studied. S-S debond protein is found to favor the formation of amorphous PVDF; whereas, high temperature denatured one has stronger interactions with β phase.

High Temperature Ultrafiltration With Kynar® Poly(Vinylidene Fluoride) Membranes

1980 ◽  
Vol 15 (4) ◽  
pp. 1193-1204 ◽  
Author(s):  
W. D. Benzinger ◽  
B. S. Parekh ◽  
J. L. Eichelberger
Keyword(s):  
High Temperature ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride
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