The piezoresponse force microscopy investigation of self-polarization alignment in poly(vinylidene fluoride-co-trifluoroethylene) ultrathin films

Soft Matter ◽  
2012 ◽  
Vol 8 (4) ◽  
pp. 1064-1069 ◽  
Author(s):  
Moonkyu Park ◽  
Yoon-Young Choi ◽  
Jiyoon Kim ◽  
Jongin Hong ◽  
Han Wook Song ◽  
...  
Keyword(s):  
Ultrathin Films ◽  
Vinylidene Fluoride ◽  
Piezoresponse Force Microscopy ◽  
Force Microscopy ◽  
Microscopy Investigation ◽  
Poly Vinylidene Fluoride

scholarly journals Interfacial piezoelectric polarization locking in printable Ti3C2Tx MXene-fluoropolymer composites

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Nick A. Shepelin ◽  
Peter C. Sherrell ◽  
Emmanuel N. Skountzos ◽  
Eirini Goudeli ◽  
Jizhen Zhang ◽  
...  
Keyword(s):  
Electrostatic Interactions ◽  
Vinylidene Fluoride ◽  
Mechanical Energy ◽  
Piezoresponse Force Microscopy ◽  
Low Energy ◽  
Force Microscopy ◽  
Energy Harvesters ◽  
Poly Vinylidene Fluoride ◽  
Dynamics Simulations ◽  
Locking Phenomena

AbstractPiezoelectric fluoropolymers convert mechanical energy to electricity and are ideal for sustainably providing power to electronic devices. To convert mechanical energy, a net polarization must be induced in the fluoropolymer, which is currently achieved via an energy-intensive electrical poling process. Eliminating this process will enable the low-energy production of efficient energy harvesters. Here, by combining molecular dynamics simulations, piezoresponse force microscopy, and electrodynamic measurements, we reveal a hitherto unseen polarization locking phenomena of poly(vinylidene fluoride–co–trifluoroethylene) (PVDF-TrFE) perpendicular to the basal plane of two-dimensional (2D) Ti3C2Tx MXene nanosheets. This polarization locking, driven by strong electrostatic interactions enabled exceptional energy harvesting performance, with a measured piezoelectric charge coefficient, d33, of −52.0 picocoulombs per newton, significantly higher than electrically poled PVDF-TrFE (approximately −38 picocoulombs per newton). This study provides a new fundamental and low-energy input mechanism of poling fluoropolymers, which enables new levels of performance in electromechanical technologies.

scholarly journals Effect of Annealing Temperature on the Morphology and Piezoresponse Characterisation of Poly(vinylidene fluoride-trifluoroethylene) Films via Scanning Probe Microscopy

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
K. Lau ◽  
Y. Liu ◽  
H. Chen ◽  
R. L. Withers
Keyword(s):  
Melting Point ◽  
Annealing Temperature ◽  
Vinylidene Fluoride ◽  
Hysteresis Loops ◽  
Piezoresponse Force Microscopy ◽  
Scanning Probe ◽  
Force Microscopy ◽  
Poly Vinylidene Fluoride ◽  
Probe Microscope ◽  
Small Grains

Poly(vinylidene fluoride-trifluoroethylene) (PVDF-TrFE (70/30)) films were synthesized on a gold/glass substrate via spin coating. The films were annealed at a temperature between125∘Cand180∘C. Nanoscale characterisation of the morphology, polarization switching, and local piezoresponse hysteresis loops of PVDF-TrFE film was studied using a scanning probe microscope (SPM). Ferroelectric switchable domains were identified by piezoresponse force microscopy (PFM) for all films. Small grains, with weak piezoresponse character, were observed for films annealed just above the Curie temperature. Acicular grains were obtained when the annealing temperature approached the melting point and the piezoresponse increased. Annealing above the melting point decreased the piezoresponse and the morphology changed dramatically into plate-like structures.

scholarly journals Crystal phase transformation of α into β phase poly(vinylidene fluoride) via particle formation caused by rapid expansion of supercritical solutions

RSC Advances ◽  
2015 ◽  
Vol 5 (82) ◽  
pp. 66644-66649 ◽  
Author(s):  
S. Wolff ◽  
F. Jirasek ◽  
S. Beuermann ◽  
M. Türk
Keyword(s):  
Phase Transformation ◽  
Vinylidene Fluoride ◽  
Piezoresponse Force Microscopy ◽  
Particle Formation ◽  
Rapid Expansion ◽  
Crystal Phase ◽  
Force Microscopy ◽  
Β Phase ◽  
Poly Vinylidene Fluoride ◽  
Crystal Phase Transformation

RESS enables the transformation from α to β phase PVDF. Piezoresponse force microscopy confirmed the piezoelectricity of the obtained particles.

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.

scholarly journals New insight into the adsorption behaviour of effluent organic matter on organic–inorganic ultrafiltration membranes: a combined QCM-D and AFM study

2018 ◽  
Vol 5 (8) ◽  
pp. 180586 ◽  
Author(s):  
Xudong Wang ◽  
Danxi Huang ◽  
Botao Cheng ◽  
Lei Wang
Keyword(s):  
Organic Matter ◽  
Vinylidene Fluoride ◽  
Adsorption Behaviour ◽  
Effluent Organic Matter ◽  
Hydrophobic Membrane ◽  
Force Microscopy ◽  
Membrane Surfaces ◽  
Initial Stage ◽  
Poly Vinylidene Fluoride ◽  
Repulsive Forces

Adsorption of organic matter on membranes plays a major role in determining the fouling behaviour of membranes. This study investigated effluent organic matter (EfOM) adsorption behaviour onto poly(vinylidene fluoride) (PVDF) membrane blended with SiO 2 nanoparticles using quartz crystal microbalance with dissipation monitoring (QCM-D) and atomic force microscopy (AFM). The QCM-D results suggested that low adsorption of EfOM and an EfOM layer with a non-rigid and open structure was formed on SiO 2 -terminated membrane surfaces. Conformational assessment showed that EfOM undergoes adsorption via two steps: (i) in the initial stage, a rapid adsorption of EfOM accumulated onto the membrane; (ii) the change in dissipation was still occurring when the adsorption frequency reached balance, and the layer tended towards a more rearranged or organized secondary structure upon adsorption onto the more hydrophilic surface. For the AFM force test, when a self-made EfOM-coated probe approached the membrane, a ‘jump-in’ was observed for the hydrophobic membrane after repulsion at a small distance, while only repulsive forces were observed for PVDF/SiO 2 membranes. This study demonstrated that the PVDF/SiO 2 membrane changed the entire filtration process, forming a ‘soft’ open conformation in the foulant layer.

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
Sign in / Sign up

Export Citation Format

Share Document