scholarly journals High Magnetoelectric Coupling of Metglas and P(VDF-TrFE) Laminates

2021 ◽  
Author(s):  
Henrik Staaf ◽  
Anurak Sawatdee ◽  
Cristina Rusu ◽  
David Nilsson ◽  
Philipp Schäffner ◽  
...  
Keyword(s):  
Vinylidene Fluoride ◽  
Conductive Polymer ◽  
Laser Doppler Vibrometer ◽  
Magnetoelectric Coupling ◽  
Capacitive Coupling ◽  
Experimental Result ◽  
Energy Harvesters ◽  
Poly Vinylidene Fluoride ◽  
Electrical Wiring ◽  
Poly Styrene Sulfonate

Abstract Magnetoelectric (magnetic/piezoelectric) heterostructures bring new functionalities to develop novel transducer devices such as (wireless) sensors or energy harvesters and thus have been attracting research interest in the last years. We have studied the magnetoelectric coupling between Metglas films (2826MB) and poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) in a laminate structure. The metallic Metglas film itself served as bottom electrode and as top electrode we used an electrically conductive polymer, poly(3,4-ethylene-dioxythiophene): poly(styrene sulfonate) (PEDOT:PSS). Besides a direct electrical wiring via a graphite ink, a novel contactless readout method is presented using a capacitive coupling between the PEDOT: PSS layer and an electrode not in contact with the PEDOT:PSS layer. From the experimental result we determined a magnetoelectric coupling of 1445 V/(cm×Oe) at the magnetoelastic resonance of the structure, which is among the highest reported values for laminate structures of a magnetostrictive and a piezoelectric polymer layer. With the noncontact readout method, a magnetoelectric coupling of about 950 V/(cm×Oe) could be achieved, which surpasses previously reported values for the case of direct sample contacting. 2D laser Doppler vibrometer measurements in combination with FE simulations were applied to reveal the complex vibration pattern resulting in the strong resonant response.

scholarly journals Studies on the electrostatic effects of stretched PVDF films and nanofibers

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Yixuan Lin ◽  
Yuqiong Zhang ◽  
Fan Zhang ◽  
Meining Zhang ◽  
Dalong Li ◽  
...  
Keyword(s):  
Vinylidene Fluoride ◽  
Polarized Light ◽  
Transition Process ◽  
Open Circuit ◽  
Wearable Electronics ◽  
Energy Harvesters ◽  
Β Phase ◽  
Poly Vinylidene Fluoride ◽  
Piezoelectric Effects ◽  
Energy Harvesting Devices

AbstractThe electroactive β-phase in Poly (vinylidene fluoride, PVDF) is the most desirable conformation due to its highest pyro- and piezoelectric properties, which make it feasible to be used as flexible sensors, wearable electronics, and energy harvesters etc. In this study, we successfully developed a method to obtain high-content β-phase PVDF films and nanofiber meshes by mechanical stretching and electric spinning. The phase transition process and pyro- and piezoelectric effects of stretched films and nanofiber meshes were characterized by monitoring the polarized light microscopy (PLM) images, outputting currents and open-circuit voltages respectively, which were proved to be closely related to stretching ratio (λ) and concentrations. This study could expand a new route for the easy fabrication and wide application of PVDF films or fibers in wearable electronics, sensors, and energy harvesting devices.

scholarly journals Biocompatible Silk/Polymer Energy Harvesters Using Stretched Poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) Nanofibers

Polymers ◽  
2017 ◽  
Vol 9 (12) ◽  
pp. 479 ◽  
Author(s):  
Raghid Najjar ◽  
Yi Luo ◽  
Dave Jao ◽  
David Brennan ◽  
Ye Xue ◽  
...  
Keyword(s):  
Vinylidene Fluoride ◽  
Energy Harvesters ◽  
Poly Vinylidene Fluoride

The Microstructural, Mechanical and Electro-Mechanical Properties of Graphene Aerogel-PVDF Nanoporous Composites

2014 ◽  
Vol 29 ◽  
pp. 1-6 ◽  
Author(s):  
Guang Ping Zheng ◽  
Z. Han ◽  
Y.Z. Liu
Keyword(s):  
Electrical Resistance ◽  
High Performance ◽  
Vinylidene Fluoride ◽  
Mechanical Relaxation ◽  
Graphene Aerogel ◽  
Energy Harvesters ◽  
Poly Vinylidene Fluoride ◽  
Mechanical Behaviours ◽  
Stress Dependent ◽  
Hybrid Scaffolds

Graphene aerogel-poly (vinylidene fluoride) (GA-PVDF) nanoporous composites with different concentrations of PVDF are fabricated. Scanning electron microscopy reveals that PVDF films with a typical thickness below 100 nm are coated at the graphene sheets in the nanoporous composites. The GA-PVDF composites show excellent compressibility, ductility and mechanical strength, as well as better sensitivity of stress-dependent electrical resistance compared with those of GAs. The improved mechanical and electro-mechanical behaviours of nanoporous composites are ascribed to the PVDF which possesses piezoelectricity. The structural properties of the graphene-PVDF nanosized hybrid scaffolds are analyzed by dynamical mechanical relaxation. The results demonstrate that the nanoporous composites could be used as high-performance sensors, actuators and kinetic energy harvesters.

Water soluble poly(styrene sulfonate)-b-poly(vinylidene fluoride)-b-poly(styrene sulfonate) triblock copolymer nanoparticles

RSC Advances ◽  
2016 ◽  
Vol 6 (60) ◽  
pp. 55374-55381 ◽  
Author(s):  
Peter Černoch ◽  
Zulfiya Černochová ◽  
Svetlana Petrova ◽  
Dana Kaňková ◽  
Joon-Sung Kim ◽  
...  
Keyword(s):  
Triblock Copolymer ◽  
Vinylidene Fluoride ◽  
Water Soluble ◽  
Styrene Sulfonate ◽  
Poly Vinylidene Fluoride ◽  
Poly Styrene Sulfonate ◽  
Soluble Poly

Water-soluble PNaSS-b-PVDF-b-PNaSS triblock copolymer.

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.

Mn 2 (CO) 10 -photomediated synthesis of poly(vinylidene fluoride)- b -poly(styrene sulfonate)

2015 ◽  
Vol 68 ◽  
pp. 460-470 ◽  
Author(s):  
Peter Černoch ◽  
Svetlana Petrova ◽  
Zulfiya Černochová ◽  
Joon-Sung Kim ◽  
Christopher P. Simpson ◽  
...  
Keyword(s):  
Vinylidene Fluoride ◽  
Styrene Sulfonate ◽  
Poly Vinylidene Fluoride ◽  
Poly Styrene Sulfonate
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