scholarly journals Electromechanical Properties of PVDF-Based Polymers Reinforced with Nanocarbonaceous Fillers for Pressure Sensing Applications

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3545 ◽  
Author(s):  
Javier Vicente ◽  
P. Costa ◽  
S. Lanceros-Mendez ◽  
Jose Manuel Abete ◽  
Aitzol Iturrospe
Keyword(s):  
Percolation Threshold ◽  
Vinylidene Fluoride ◽  
Applied Pressure ◽  
The Other ◽  
Ductile Material ◽  
Maximum Strain ◽  
Pressure Sensing ◽  
Sensing Applications ◽  
Other Hand ◽  
Poly Vinylidene Fluoride

Polymer-based composites reinforced with nanocarbonaceous materials can be tailored for functional applications. Poly(vinylidene fluoride) (PVDF) reinforced with carbon nanotubes (CNT) or graphene with different filler contents have been developed as potential piezoresistive materials. The mechanical properties of the nanocomposites depend on the PVDF matrix, filler type, and filler content. PVDF 6010 is a relatively more ductile material, whereas PVDF-HFP (hexafluropropylene) shows larger maximum strain near 300% strain for composites with CNT, 10 times higher than the pristine polymer. This behavior is similar for all composites reinforced with CNT. On the other hand, reduced graphene oxide (rGO)/PVDF composites decrease the maximum strain compared to neat PVDF. It is shown that the use of different PVDF copolymers does not influence the electrical properties of the composites. On the other hand, CNT as filler leads to composites with percolation threshold around 0.5 wt.%, whereas rGO nanocomposites show percolation threshold at ≈ 2 wt.%. Both nanocomposites present excellent linearity between applied pressure and resistance variation, with pressure sensibility (PS) decreasing with applied pressure, from PS ≈ 1.1 to 0.2 MPa−1. A proof of concept demonstration is presented, showing the suitability of the materials for industrial pressure sensing applications.

scholarly journals Electromechanical Properties of PVDF-Based Polymers Reinforced with Nanocarbonaceous Fillers for Pressure Sensing Applications

2019 ◽  
Author(s):  
Javier Teixido ◽  
Pedro Costa ◽  
Senentxu Lanceros-Mendez ◽  
Jose Manuel Abete ◽  
Aitzol Iturrospe Iregui
Keyword(s):  
Percolation Threshold ◽  
Vinylidene Fluoride ◽  
Applied Pressure ◽  
The Other ◽  
Ductile Material ◽  
Maximum Strain ◽  
Pressure Sensing ◽  
Sensing Applications ◽  
Other Hand ◽  
Poly Vinylidene Fluoride

Polymer-based composites reinforced with nanocarbonaceous materials can be tailored for functional applications. Poly(vinylidene fluoride) (PVDF) reinforced with carbon nanotubes (CNT) or graphene with different filler contents have been developed as potential piezoresistive materials. The mechanical properties of the nanocomposites depend of the PVDF matrix, filler type and filler content. PVDF 6010 is a relatively more ductile material, whereas PVDF-HFP shows larger maximum strain near 300% strain for composites with CNT, 10 times higher than the pristine polymer. This behaviour is similar for all composites reinforced with CNT. On the other hand, rGO/PVDF composites decrease the maximum strain compared to neat PVDF. It is shown that the use of different PVDF copolymers does not influence the electrical properties of the composites. On the other hand, CNT as filler leads to composites with percolation threshold around 0.5 wt.%, whereas reduced graphene oxide (rGO) nanocomposites shows percolation threshold at ≈2 wt.%. Both nanocomposites present excellent linearity between applied pressure and resistance variation, with pressure sensibility (PS) decreasing with applied pressure, from PS≈ 1.1 to 0.2 MPa-1. A proof of concept demonstration is presented, showing the suitability of the materials for industrial pressure sensing applications.

ZnAl–LDH-induced electroactive β-phase and controlled dielectrics of PVDF for high-performance triboelectric nanogenerator for humidity and pressure sensing applications

2021 ◽  
Author(s):  
Soon-Gil Yoon ◽  
Ippili Swathi ◽  
Venkatraju Jella ◽  
Alphi-Maria Thomas ◽  
Chongsei Yoon ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Energy Storage ◽  
High Performance ◽  
Vinylidene Fluoride ◽  
Triboelectric Nanogenerator ◽  
Pressure Sensing ◽  
Β Phase ◽  
Sensing Applications ◽  
Poly Vinylidene Fluoride ◽  
Double Hydroxides

Layered double hydroxides (LDHs) have been extensively investigated for various applications such as drug delivery, energy storage, catalysis, and luminescence. In this study, an eco-friendly ZnAl–CO3–LDH-poly(vinylidene fluoride) (ZnAl–LDH–PVDF) composite acting...

Development of a novel pressure sensing material based on polypyrrole-coated electrospun poly(vinylidene fluoride) fibers

2014 ◽  
Vol 179 ◽  
pp. 52-59 ◽  
Author(s):  
Claudia Merlini ◽  
Rosemeire dos Santos Almeida ◽  
Marcos Akira D'Ávila ◽  
Wido Herwig Schreiner ◽  
Guilherme Marriz de Oliveira Barra
Keyword(s):  
Vinylidene Fluoride ◽  
Pressure Sensing ◽  
Sensing Material ◽  
Poly Vinylidene Fluoride

Fabrication and properties of PVDF/expanded graphite nanocomposites

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Yuchao Li ◽  
R. K. Y. Li ◽  
S. C. Tjong
Keyword(s):  
Dielectric Constant ◽  
Percolation Threshold ◽  
Structural Changes ◽  
Vinylidene Fluoride ◽  
Expanded Graphite ◽  
Nucleating Agent ◽  
X Ray Diffraction ◽  
Melt Mixing ◽  
Poly Vinylidene Fluoride ◽  
Higher Temperature

AbstractPoly(vinylidene fluoride) (PVDF) nanocomposites filled with various expanded graphite (EG) contents were prepared via melt-mixing followed by hotpressing. The structure, electrical, and thermal properties of resulting nanocomposites were investigated. X-ray diffraction results indicated that the EG additions do not lead to structural changes of PVDF. Differential thermal calorimetry measurements revealed that EG act as a nucleating agent for PVDF molecular chains. The crystallization temperature shifted to higher temperature with increasing EG content. DMA results showed that the storage modulus and glass transition temperature can be enhanced by adding EG. The nanocomposites were found to exhibit a small percolation threshold of 6.3 vol% due to the large aspect ratio of graphite nano-sheets. A great enhancement of dielectric constant is also found as EG concentration approaches percolation threshold. Both the electrical conductivity and dielectric constant of PVDF/EG nanocomposites can be well described by the percolation theory.

Carbon Nanotube-Poly(Vinylidene Fluoride) Composite Films for Strain-Sensing Applications

2017 ◽  
Vol 909 ◽  
pp. 237-242
Author(s):  
Gundati Sudheer Kumar ◽  
D. Vishnupriya ◽  
Ralph Antao ◽  
T. Umasankar Patro
Keyword(s):  
Carbon Nanotube ◽  
Vinylidene Fluoride ◽  
Composite Films ◽  
Linear Increase ◽  
Melt Blending ◽  
Strain Sensing ◽  
Sensing Applications ◽  
Custom Made ◽  
Poly Vinylidene Fluoride ◽  
Electrical Conducting

Acid-functionalized carbon nanotube (fCNT)-poly (vinylidene fluoride) (PVDF) composite films with different CNT contents (0-0.5wt%) were prepared by melt-blending followed by compression molding. The electrical resistance (R) of the composite films under tensile loading was measured by a two-probe method using a custom made equipment connected to digital multimeter. The films (0.35 and 0.5wt% fCNT composites) showed exponential increases in R with displacement after attaining the elastic strain. Further, the change in resistance divided by resistance (ΔR/R) showed a linear increase with strain (ε). The slope of the linear region is found to be higher for 0.35wt% fCNT composite (5.4) as compared to 0.5wt% fCNT composite (3.4), indicating a better sensitivity in the former case. This may be due to less number of electrical conducting paths in case of 0.35fCNT composite. On account of the results obtained, the composites promise as potential candidates for strain sensing in health monitoring.

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