The Crystalline Microstructure, Surface Morphology and Ferroelectric Properties of β-Phase in the Poly(Vinylidene Fluoride)/Carbon Nanotubes (PVDF/CNTs) Composite Thin Film Using the Electrospinning Approach

2018 ◽  
Vol 7 (6) ◽  
pp. 873-878
Author(s):  
Do Phuong Anh ◽  
Tran Thi Nhu Hoa ◽  
Nguyen Van Thinh ◽  
Vo Thanh Tung ◽  
Truong Van Chuong
Keyword(s):  
Thin Film ◽  
Carbon Nanotubes ◽  
Surface Morphology ◽  
Vinylidene Fluoride ◽  
Ferroelectric Properties ◽  
Composite Thin Film ◽  
Β Phase ◽  
Poly Vinylidene Fluoride ◽  
Crystalline Microstructure

Enhanced Electromechanical Properties in Poly(Vinylidene Fluoride) (PVDF)-Based Nanocomposites

2009 ◽  
Author(s):  
Sujay Deshmukh ◽  
Zoubeida Ounaies
Keyword(s):  
Carbon Nanotubes ◽  
Vinylidene Fluoride ◽  
Single Walled Carbon Nanotubes ◽  
Electromechanical Properties ◽  
Molecular Chemistry ◽  
Single Walled Carbon ◽  
Β Phase ◽  
Alternative Approach ◽  
Poly Vinylidene Fluoride ◽  
Walled Carbon Nanotubes

Efforts to enhance the electromechanical properties of Poly(vinylidene fluoride) (PVDF) and its copolymers have been directed at optimizing the molecular chemistry, stretching and poling parameters. This study investigates an alternative approach to enhancing the properties via adding nanoinclusions in PVDF. We investigate the enhanced electrostrictive response in PVDF by adding Single Walled Carbon Nanotubes (SWNTs). We also show the change in the non-polar morphology of “as-is” PVDF to the polar γ phase by adding SWNTs and eventually to the piezoelectric β phase by stretching the nanocomposites.

Poling of β-poly(vinylidene fluoride): dielectric and IR spectroscopy studies

e-Polymers ◽  
2005 ◽  
Vol 5 (1) ◽  
Author(s):  
Victor Sencadas ◽  
Carlos M. Costa ◽  
Victor Moreira ◽  
Jorge Monteiro ◽  
Sushil K. Mendiratta ◽  
...  
Keyword(s):  
Ir Spectroscopy ◽  
Mechanical Response ◽  
Vinylidene Fluoride ◽  
Ferroelectric Properties ◽  
Amorphous Structure ◽  
Temperature Conductivity ◽  
Poling Process ◽  
Β Phase ◽  
Main Effect ◽  
Poly Vinylidene Fluoride

Abstractβ-Poly(vinylidene fluoride) (β-PVDF) exhibits ferroelectric properties due to the special arrangement of the chain units in the crystalline phase. The piezoelectric properties of the material can be optimised by poling the original stretched film. The main effect of the poling process is the alignment of the randomly organised dipolar moments against the applied field. In this work, poled and non-poled β- PVDF from the same batch are characterised by dielectric spectroscopy. The origin of the electrical and mechanical response of poled and non-poled β-PVDF were further explored by far IR spectroscopy and discussed on a molecular level. The main effect of the poling process on the dielectric response of the material is a small increase of the dielectric constant due to the preferential alignment of the main dipolar contribution and a slight decrease of the dielectric loss, due to the more organized amorphous structure. The conductivity is strongly increased by poling, especially the high-temperature conductivity, ascribed mainly to hopping conductivity due to free charges induced during poling. FTIR experiments indicate that the origin of these effects and also of the variations in the thermo-mechanical response of the material can be found in the reorientation of the crystalline dipoles along the poling field, together with a partial reduction of the amount of α phase and an increase of the amount of β phase. The α to β transformation, mainly due to the stretching process, seems to be optimized by the poling process.

Achieving β-phase poly(vinylidene fluoride) from melt cooling: Effect of surface functionalized carbon nanotubes

Polymer ◽  
2014 ◽  
Vol 55 (2) ◽  
pp. 611-619 ◽  
Author(s):  
Kai Ke ◽  
Petra Pötschke ◽  
Dieter Jehnichen ◽  
Dieter Fischer ◽  
Brigitte Voit
Keyword(s):  
Carbon Nanotubes ◽  
Vinylidene Fluoride ◽  
Cooling Effect ◽  
Functionalized Carbon Nanotubes ◽  
Β Phase ◽  
Poly Vinylidene Fluoride ◽  
Melt Cooling ◽  
Effect Of Surface

Effect of crystallinity on surface morphology and light transmittance of poly(vinylidene fluoride-co-hexafluoropropylene) thin film

2009 ◽  
Vol 114 (5) ◽  
pp. 3331-3337 ◽  
Author(s):  
Sang Goo Lee ◽  
Jong Sung Lee ◽  
Jong-Wook Ha ◽  
In Jun Park ◽  
Soo-Bok Lee ◽  
...  
Keyword(s):  
Thin Film ◽  
Surface Morphology ◽  
Vinylidene Fluoride ◽  
Light Transmittance ◽  
Poly Vinylidene Fluoride

Effect of Carbon Nanotubes on the Shape Memory Performance of Poly(vinylidene fluoride)/Acrylic Blends

2013 ◽  
Vol 30 (2) ◽  
pp. 134
Author(s):  
Hui FU ◽  
Jishan QIU ◽  
Ning CHONG ◽  
Yaqing WANG ◽  
Yuanyuan TIAN ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Shape Memory ◽  
Vinylidene Fluoride ◽  
Memory Performance ◽  
Poly Vinylidene Fluoride

High Efficient and Continuous Triboelectric Power Harvesting based on Porous β-phase Poly (vinylidene fluoride) Aerogel

2021 ◽  
Author(s):  
Minmin Wang ◽  
Weiqun Liu ◽  
Xu Shi ◽  
Jinyang Pan ◽  
Bing Zhou ◽  
...  
Keyword(s):  
Vinylidene Fluoride ◽  
High Electron ◽  
Exchange Method ◽  
Power Harvesting ◽  
Β Phase ◽  
Output Performance ◽  
High Electron Affinity ◽  
High Efficient ◽  
Poly Vinylidene Fluoride ◽  
High Output

Non-additive β-phase porous poly (vinylidene fluoride) (PVDF) aerogel with high electron affinity is successfully prepared through simple solvent exchange method. The as-prepared additive-free PVDF aerogel shows high output performance used...

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