Quick Heat Dissipation in Absorption-Dominated Microwave Shielding Properties of Flexible Poly(vinylidene fluoride)/Carbon Nanotube/Co Composite Films with Anisotropy-Shaped Co (Flowers or Chains)

2018 ◽  
Vol 10 (47) ◽  
pp. 40789-40799 ◽  
Author(s):  
Xiping Li ◽  
Shuiping Zeng ◽  
Shiju E ◽  
Luyang Liang ◽  
Zhongyi Bai ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Heat Dissipation ◽  
Vinylidene Fluoride ◽  
Composite Films ◽  
Microwave Shielding ◽  
Poly Vinylidene Fluoride ◽  
Shielding Properties

Physical Properties of Thin PVDF/MWNT (Multi-Walled Carbon Nanotube) Composite Films by Melt Blending

2008 ◽  
Vol 8 (9) ◽  
pp. 4860-4863 ◽  
Author(s):  
Soon Man Hong ◽  
Seung Sang Hwang
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Physical Properties ◽  
Vinylidene Fluoride ◽  
Composite Films ◽  
Nucleating Agent ◽  
Multi Walled Carbon Nanotube ◽  
Poly Vinylidene Fluoride ◽  
Carbon Nanotube Composite ◽  
Internal Mixer

Poly(vinylidene fluoride)(PVDF)/Multi-walled carbon nanotube (MWNT) composites were melt blended using internal mixer. The relationships between structures and physical properties of thin PVDF/MWNT composite films were studied. With increasing the content of MWNT, the size of spherulites in PVDF decreased. MWNT was used as a nucleating agent. The incorporation of MWNT produced a polar β-form crystal structure of PVDF. The permittivities of thin PVDF/MWNT composite films were increased with increasing the MWNT content. The percolation level in electrical conductivity occurred between 2 and 2.5 wt%. The critical conductivity saturation point for the electrical conductivity in PVDF was confirmed. Similar tendency was also observed in thermal conductivity.

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.

Tunable electromagnetic shielding properties of conductive poly(vinylidene fluoride)/Ni chain composite films with negative permittivity

2017 ◽  
Vol 5 (28) ◽  
pp. 6954-6961 ◽  
Author(s):  
Biao Zhao ◽  
Chul B. Park
Keyword(s):  
Vinylidene Fluoride ◽  
Composite Films ◽  
Compression Molding ◽  
Electromagnetic Shielding ◽  
Negative Permittivity ◽  
Solution Processing ◽  
Molding Method ◽  
Poly Vinylidene Fluoride ◽  
Shielding Properties

In this study, we fabricated various poly(vinylidene fluoride) (PVDF)/Ni-chain composites with different Ni contents using the solution processing and compression molding method.

scholarly journals All-Fiber Pyro- and Piezo-electric Nanogenerator for IoT Based Self-Powered Health-Care Monitoring

2021 ◽  
Author(s):  
Biswajit Mahanty ◽  
Sujoy Kumar Ghosh ◽  
Kuntal Maity ◽  
KRITTISH ROY ◽  
Subrata Sarkar ◽  
...  
Keyword(s):  
Health Care ◽  
Carbon Nanotube ◽  
Vinylidene Fluoride ◽  
Electrospun Nanofibers ◽  
Multiwall Carbon Nanotube ◽  
Poly Vinylidene Fluoride ◽  
Self Powered ◽  
Health Care Monitoring ◽  
Multiwall Carbon ◽  
Piezo Electric

In this work, an all-fiber pyro- and piezo-electric nanogenerator (PPNG) is designed by multiwall carbon nanotube (MWCNT) doped poly(vinylidene fluoride) (PVDF) electrospun nanofibers as the active layer and interlocked conducting...

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