Enhancement of Electrical Conductivity of Copper/Carbon-Nanotube Composite Wire

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.

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Viable synthesis of highly compressible, ultra-light graphene–carbon nanotube composite aerogels without additional reductant and their applications for strain-sensitivity

Chemical Communications ◽

10.1039/c6cc07450b ◽

2017 ◽

Vol 53 (3) ◽

pp. 521-524 ◽

Cited By ~ 16

Author(s):

Liang Gao ◽

Feng Wang ◽

Wenwei Zhan ◽

Yue Wang ◽

Gang Sui ◽

...

Keyword(s):

Electrical Conductivity ◽

Carbon Nanotube ◽

Strain Sensitivity ◽

Facile Synthesis ◽

Composite Aerogels ◽

Carbon Nanotube Composite

A facile synthesis of ultra-light graphene–carbon nanotube composite aerogels that needed no additional reductant is reported herein, and the aerogels exhibited highly compressibility and superior electrical conductivity.

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Tuning of electrical conductivity and hysteresis effect in poly(methyl methacrylate)–carbon nanotube composite films

RSC Advances ◽

10.1039/c2ra22634k ◽

2013 ◽

Vol 3 (10) ◽

pp. 3325-3332 ◽

Cited By ~ 14

Author(s):

Bipul Biswas ◽

Avijit Chowdhury ◽

Biswanath Mallik

Keyword(s):

Electrical Conductivity ◽

Carbon Nanotube ◽

Methyl Methacrylate ◽

Composite Films ◽

Hysteresis Effect ◽

Poly Methyl Methacrylate ◽

Carbon Nanotube Composite

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Fabrication of Aligned-Carbon-Nanotube-Composite Paper with High and Anisotropic Conductivity

Journal of Nanotechnology ◽

10.1155/2012/819281 ◽

2012 ◽

Vol 2012 ◽

pp. 1-5 ◽

Cited By ~ 6

Author(s):

Yuki Fujitsuka ◽

Takahide Oya

Keyword(s):

Electrical Conductivity ◽

Carbon Nanotube ◽

Surface Resistance ◽

Anisotropic Conductivity ◽

Conductive Material ◽

Ac Field ◽

Carbon Nanotube Composite ◽

Paper Fibers ◽

Functional Paper ◽

Composite Paper

A functional carbon-nanotube (CNT)-composite paper is described in which the CNTs are aligned. This “aligned-CNT composite paper” is a flexible composite material that has CNT functionality (e.g., electrical conductivity) despite being a paper. An advanced fabrication method was developed to overcome the problem of previous CNT-composite papers, that is, reduced conductivity due to random CNT alignment. Aligning the CNTs by using an alternating current (AC) field was hypothesized to increase the electrical conductivity and give the paper an anisotropic characteristic. Experimental results showed that a nonionic surfactant was not suitable as a CNT dispersant for fabricating aligned-CNT composite paper and that catechin with its six-membered rings and hydrophilic groups was suitable. Observation by scanning electron microscopy of samples prepared using catechin showed that the CNTs were aligned in the direction of the AC field on the paper fibers. Measurement of the electric conductivity showed that the surface resistance was different between the direction of the aligned CNTs (high conductivity) and that of verticality (low). The conductivity of the aligned-CNT-composite paper samples was higher than that of nonaligned samples. This unique and functional paper, which has high and anisotropic conductivity, is applicable to a conductive material to control the direction of current.

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