Nanoparticle Dispersion and Electroactive Phase Content in Polyvinylidene Fluoride/Ni0.5Zn0.5Fe2O4 Nanocomposites for Magnetoelectric Applications

2012 ◽  
Vol 12 (8) ◽  
pp. 6845-6849 ◽  
Author(s):  
P. Martins ◽  
C. M. Costa ◽  
M. Benelmekki ◽  
S. Lanceros-Mendez
Keyword(s):  
Polyvinylidene Fluoride ◽  
Phase Content ◽  
Nanoparticle Dispersion

Improving nanoparticle dispersion and polymer crystallinity in polyvinylidene fluoride/POSS coatings using tetrahydrofuran as co-solvent

2020 ◽  
Vol 140 ◽  
pp. 105534 ◽  
Author(s):  
Mehrdad Khodaie ◽  
Ardeshir Saeidi ◽  
Hossein Ali Khonakdar ◽  
Javad Seyfi ◽  
Iman Hejazi ◽  
...  
Keyword(s):  
Polyvinylidene Fluoride ◽  
Nanoparticle Dispersion ◽  
Polymer Crystallinity

scholarly journals Effects of tourmaline on the voltage response of PVDF filaments

2017 ◽  
Vol 68 (01) ◽  
pp. 47-53 ◽  
Author(s):  
BAYRAMOL DERMAN VATANSEVER
Keyword(s):  
Polyvinylidene Fluoride ◽  
Impact Test ◽  
Voltage Response ◽  
Phase Content ◽  
Piezoelectric Crystal ◽  
Test Rig ◽  
Digital Oscilloscope ◽  
Melting Characteristics ◽  
Negative Effect ◽  
Surface Morphologies

The aim of this research was to investigate the effect of a natural piezoelectric crystal material on the voltage response of polymeric filaments. Polyvinylidene fluoride (PVDF)-based piezoelectric filaments containing tourmaline (TM) powder were successfully produced. TM powder was directly blended in thermoplastic PVDF polymer at mass ratios of 1%, 3% and 5% via a compounder. Pristine PVDF filaments were also produced as control materials. Tensile properties, the surface morphologies and melting characteristics of resulting filaments were investigated. Piezoelectric b-phase content was calculated from the intensity levels of peaks at certain wavenumbers obtained from Fourier transform infrared spectroscopy (FTIR). Voltage responses of the filaments were investigated by an impact test rig and recorded by a digital oscilloscope. The results show that the addition of TM powder into PVDF polymer did not have a negative effect on tenacity of the filaments but a slight increase in b-phase content and the voltage response were observed with an increase in TM ratio.

scholarly journals Enhanced piezoelectricity of PVDF nanofibers via a plasticizer treatment for energy harvesting

2021 ◽  
Vol 8 (12) ◽  
pp. 125001
Author(s):  
Bilal Zaarour
Keyword(s):  
Energy Harvesting ◽  
Polyvinylidene Fluoride ◽  
Solid Support ◽  
Phase Content ◽  
Initial Length ◽  
Great Demand ◽  
Energy Harvesters ◽  
Active Layers ◽  
The Web

Abstract Enhancing the electrical outputs of energy harvesters is a great demand for researchers in recent years. In this work, the effect of the plasticizer treatment (Tetrahydrofuran [THF]) on the β phase content (F[β]) of electrospun polyvinylidene fluoride (PVDF) fiber webs which are used as active layers to directly make a piezoelectric nanogenerator (PENG) is demonstrated. The results showed that during the plasticizer treatment, the F(β) of the web increases when the initial length of the web (L0) equals the distance between the two ends of the solid support (L) which the web fixed on it, whereas the F(β) decreases when L < L0 resulting in the formation of crimped fibers. Furthermore, the electrical outputs of the PENG based on the pristine web, and treated webs at different lengths are investigated. We believe this work can be used as a good reference for enhancing the electrical outputs of the PENG by enhancing the F (β) of PVDF nanofiber webs using a plasticizer treatment.

scholarly journals A comparative study of electrospun polyvinylidene fluoride and poly(vinylidenefluoride-co-trifluoroethylene) fiber webs: Mechanical properties, crystallinity, and piezoelectric properties

2020 ◽  
Vol 15 ◽  
pp. 155892502093929 ◽  
Author(s):  
Wenxin Zhang ◽  
Bilal Zaarour ◽  
Lei Zhu ◽  
Chen Huang ◽  
Bugao Xu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Comparative Study ◽  
Polyvinylidene Fluoride ◽  
Piezoelectric Properties ◽  
Energy Scavenging ◽  
Phase Content ◽  
Β Phase ◽  
Accurate Comparison ◽  
Fabrication And Characterization

Energy scavenging has been attracting the consideration of researchers in recent years. In this study, the fabrication and characterization of electrospun randomly oriented and aligned grooved polyvinylidene fluoride (PVDF) and poly(vinylidenefluoride-co-trifluoroethylene) (PVDF-TrFE) fiber webs are studied. The fibers are generated with comparable diameters and the webs which are used as an active layer to directly make a piezoelectric nanogenerator are fabricated with the same thickness for accurate comparison. The results show that PVDF-TrFE fiber webs have better mechanical properties, crystallinity, and piezoelectric properties than PVDF fiber webs. Furthermore, the piezoelectric nanogenerator based on PVDF-TrFE fiber webs has higher electrical outputs than piezoelectric nanogenerator based on PVDF fiber webs owing to its high β phase content (F(β)). Moreover, the electrical outputs of the piezoelectric nanogenerator based on aligned fiber webs are higher than those based on randomly oriented fiber webs due to the increase in the friction area. We believe that our work can be served as a good reference for the comparison between the mechanical, physicochemical, and piezoelectric properties of PVDF and PVDF-TrFE fiber webs generated via electrospinning.

Piezoelectric PVDF Nanofibrous Membrane Electrospinning Optimization Parameters

2021 ◽  
Vol 897 ◽  
pp. 71-76
Author(s):  
Aliaa Essam ◽  
Ahmed H. El-Shazly ◽  
Hassan Shokry
Keyword(s):  
Flow Rate ◽  
Efficient Method ◽  
Polyvinylidene Fluoride ◽  
Piezoelectric Properties ◽  
Solution Concentration ◽  
Phase Content ◽  
Optimum Conditions ◽  
Β Phase ◽  
Optimization Parameters ◽  
Mechanical Stretching

The application of piezoelectric polyvinylidene fluoride (PVDF) has become of a great interest. Due to its piezoelectric properties, PVDF is used in various applications, namely, microdevices and sensors. Electrospinning was found to be the most suitable and efficient method to synthesis PVDF nanofibers. It is used to obtain PVDF nanofibers without additional mechanical stretching and with high β phase content. For these reasons, it is considered to be an economic technique. In the present paper, the parameters affecting the synthesis of PVDF nanofibers such as solution concentration, flow rate, voltage and Tip to Collector Distance (TCD), have been investigated. The optimum conditions were found to be 18% concentration, 15 cm TCD, 1 mL/h flowrate and 19 kV voltages. The fabricated nanofiber has been characterized using SEM, FTIR, XRD and a conductivity test.

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