The Study of Volume Electrical Resistivity and Mechanical Property of Double Continuous Phase PVDF/CBT Composite Containing Carbon Black and Graphite

2013 ◽  
Vol 838-841 ◽  
pp. 107-110 ◽  
Author(s):  
Jian Bin Song ◽  
Yu Mei Zhong ◽  
Song Yue Lin ◽  
Lin Sheng Lan ◽  
Wen Bin Yang
Keyword(s):  
Electrical Resistivity ◽  
Flexural Strength ◽  
Carbon Black ◽  
Vinylidene Fluoride ◽  
Flexural Modulus ◽  
Testing Machine ◽  
Continuous Phase ◽  
Graphite Content ◽  
Poly Vinylidene Fluoride ◽  
Material Testing Machine

The Poly(vinylidene fluoride)(PVDF)/Cyclic Butylene Terephthalate (CBT)/carbon black (CB)/graphite (GR) composites were prepared by melting blend method and were studied by milliohmmeter and material testing machine. The results showed that due to the formation of CB and GR conductive network, the volume electrical resistivity of PVDF/CBT/CB/GR composites linearly decreased as graphite content increased at below 4 wt% of graphite, but it in turn increased when graphite content was higher than 4 wt%. Flexural strength showed an increase at below 1.6 wt% of GR and gradually decreased as GR content increased further. Differently, flexural modulus of composites declined as GR content increased. In all composites, the flexural strength was more than 25 MPa, which satisfied with the requirements of bipolar plates.

The Study of Volume Electrical Resistivity and Mechanical Property of CBT/Carbon Black/Aluminum Composites

2013 ◽  
Vol 838-841 ◽  
pp. 115-118
Author(s):  
Jian Bin Song ◽  
Yu Mei Zhong ◽  
Lin Sheng Lan ◽  
Song Yue Lin ◽  
Wen Bin Yang
Keyword(s):  
Mechanical Property ◽  
Electrical Resistivity ◽  
Flexural Strength ◽  
Carbon Black ◽  
Testing Machine ◽  
Material Testing ◽  
Aluminum Composites ◽  
Al Content ◽  
Maximum Value ◽  
Material Testing Machine

Cyclic Butylene Terephthalate (CBT)/carbon black (CB)/aluminum composites were prepared by melting blend method and their conductivity and mechanical property were studied by Milliohmmeter and material testing machine. The results showed that at below 1.6 wt% of flake aluminum（Al）, volume electrical resistivity and flexural strength of composites increased with Al content increases and reached the maximum value at 1.6 wt% of Al. Composites containing 18.4 wt% of CB and 1.6 wt% of aluminum exhibited excellent comprehensive performance (electrical resistivity, 20.3 Ω.cm; flexural strength, 40.0 MPa).

scholarly journals Fabrication of Piezoelectric PVDF/PAR Composites Using a Sheath-Core Fiber Method

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2214
Author(s):  
Min Hong Jeon ◽  
Yu Rim Lee ◽  
Hyeon Soo Lim ◽  
Jong Sung Won ◽  
Seung Goo Lee
Keyword(s):  
Vinylidene Fluoride ◽  
Piezoelectric Properties ◽  
Testing Machine ◽  
X Ray Diffraction ◽  
Composite Surface ◽  
Fiber Assembly ◽  
Universal Testing ◽  
Poly Vinylidene Fluoride ◽  
Core Fiber ◽  
Growing Conditions

We report the preparation of sheath-core type fibers made from poly(vinylidene fluoride) (PVDF) and polyarylate (PAR) using melt conjugate spinning to fabricate piezolectric composites. The morphology of this sheath-core fiber was determined through scanning electron microscopy. Subsequently, by the compression molding of the PVDF/PAR sheath-core fiber assembly, we fabricated PVDF/PAR composites exhibiting piezoelectric properties. For enhancing the piezoelectric properties, we increased the concentration of PVDF β-crystalline phase in the PVDF/PAR composite through poling post-treatments. The resulting crystal structure of PVDF was confirmed through infrared spectroscopy and X-ray diffraction. A universal testing machine was employed to measure the tensile properties of the PVDF/PAR composites. Finally, through a hydrothermal growing method, ZnO was coated on the composite surface to enhance the piezoelectric properties, which were subsequently optimized by varying the hydrothermal growing conditions.

Plasma-Assisted Functionalization of the Carbon Black Surface: Enhancement of Mechanical Properties of Carbon Black/Poly(vinylidene fluoride-co-hexafluoropropene) Nanofibers

2020 ◽  
Vol 20 (9) ◽  
pp. 5648-5653
Author(s):  
Jingjing Zhang ◽  
Yeong Min Park ◽  
Xing Yan Tan ◽  
Mun Ki Bae ◽  
Seung Pyo Hong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Polymer Composites ◽  
Vinylidene Fluoride ◽  
Thermal Conductance ◽  
Strain Curve ◽  
Chemical Vapor ◽  
Nitrogen Plasma ◽  
Poly Vinylidene Fluoride ◽  
Black Surface

Dispersion of carbon black (CB) powder in CB/polymer composites considerably influences their mechanical properties, electrical conductivity, and thermal conductance. In this study, with the aim to improve the dispersion of CB powder in the CB/polymer composites, CB was treated with oxygen and nitrogen plasma generated by radio frequency-plasma enhanced chemical vapor deposition (RF-PECVD), and then, dispersed in a poly(vinylidene fluoride-co-hexafluoropropene) (PVDF-HFP) solution. The solution was then subjected to electrospinning, leading to the formation of a nanofiber mat. The dispersion states of plasma treated CBs have been characterized using scanning electron microscopy and Fourier-transform infrared spectroscopy. A stress–strain curve was used to investigate the influence of dispersion on the mechanical properties of CB/polymer composites.

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