scholarly journals Organic, Flexible, Polymer Composites for High-Temperature Piezoelectric Applications

2014 ◽  
Vol 1 (3-4) ◽  
Author(s):  
Cary Baur ◽  
Yuan Zhou ◽  
Justin Sipes ◽  
Shashank Priya ◽  
Walter Voit
Keyword(s):  
High Temperature ◽  
Polymer Composites ◽  
Vinylidene Fluoride ◽  
Piezoelectric Response ◽  
Flexible Polymer ◽  
Piezoelectric Polymers ◽  
Poly Vinylidene Fluoride ◽  
Industrial Use ◽  
Operating Temperatures

AbstractIndustrial use of piezoelectric polymers is currently limited by low piezoelectric response and large performance losses at elevated operating temperatures. Leading polymers such as poly(vinylidene fluoride) and poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE)) possess piezoelectric d

Temperature Response of Magnetostrictive/Piezoelectric Polymer Magnetoelectric Laminates

2011 ◽  
Vol 495 ◽  
pp. 351-354 ◽  
Author(s):  
Jon Gutiérrez ◽  
Andoni Lasheras ◽  
Jose Manuel Barandiaran ◽  
Jose Luis Vilas ◽  
María San Sebastián ◽  
...  
Keyword(s):  
High Temperature ◽  
Vinylidene Fluoride ◽  
Hybrid Composites ◽  
Temperature Response ◽  
High Sensitivity ◽  
Piezoelectric Response ◽  
Sensors And Actuators ◽  
Laminate Composites ◽  
Piezoelectric Polymers ◽  
Piezoelectric Polymer

Magnetostrictive/piezoelectric hybrid composites have recently attracted renewed interest as high sensitivity sensors and actuators. One of the most common used geometry consists in laminated amorphous magetostrictive metal/piezoelectric layers, and the maximum magnetoelectric effect has been found at the electromechanical resonance of the system. Here we present results concerning the fabrication of such laminate composites sensor by using Vitrovac 4040® (Fe39Ni39Mo4Si6B12) as the magnetostrictive amorphous component and two different piezoelectric polymers: poly (vinylidene fluoride) (PVDF) and 2,6(β-CN)APB/ODPA (poli 2,6) polyimide, a new high temperature piezoelectric polymer. We have measured room temperature induced magnetoelectric voltages of 79.6 and 0.35 V/cm.Oe at the magnetoelastic resonance of the laminate when using PVDF and poli 2,6 polyimide as piezoelectric components. We have also tested the magnetoelectric response of both laminated composites at temperatures up to 85 °C, and we have observed that the PVDF polymer piezoelectric response quickly decays. Even if the induced magnetoelectric voltage is low, we discuss the advantage of using new piezoelectric polymers due to their good performance at high temperatures, up to 200 °C, making these laminate composites suitable for high temperature applications.

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

scholarly journals Degradation of the dielectric and piezoelectric response of β-poly(vinylidene fluoride) after temperature annealing

2011 ◽  
Vol 18 (6) ◽  
pp. 1451-1457 ◽  
Author(s):  
M. P. Silva ◽  
C. M. Costa ◽  
V. Sencadas ◽  
A. J. Paleo ◽  
S. Lanceros-Méndez
Keyword(s):  
Vinylidene Fluoride ◽  
Piezoelectric Response ◽  
Poly Vinylidene Fluoride

A Novel Fluorocarbon Elastomer for High-Temperature Sealing Applications in Aggressive Motor-Oil Environments

1990 ◽  
Vol 63 (4) ◽  
pp. 516-522 ◽  
Author(s):  
W. M. Grootaert ◽  
R. E. Kolb ◽  
A. T. Worm
Keyword(s):  
High Temperature ◽  
Elevated Temperature ◽  
Automotive Industry ◽  
Corrosion Inhibitors ◽  
Vinylidene Fluoride ◽  
Motor Oil ◽  
Aging Behavior ◽  
Lubricating Oils ◽  
Engine Oils ◽  
Operating Temperatures

Abstract The tendency in the automotive industry to use smaller engines has resulted in a situation where lubricating oils are exposed to higher operating temperatures. This is especially the case in countries where there is no restriction on highway speed. Amine-based additives present in the oils (e.g., as dispersants and corrosion inhibitors) tend to slowly attack the conventional fluorocarbon elastomer seals under these conditions. As a result of that attack, the seal becomes brittle and eventually fails. A novel fluorocarbon elastomer of vinylidene fluoride, tetrafluoroethylene, and propylene has shown excellent aging behavior in the laboratory toward many aggressive engine oils at elevated temperature. Its improved resistance as compared to conventional fluorocarbon elastomers is attributed to the replacement of hexafluoropropylene with propylene.

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