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

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
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.

scholarly journals Development of Paper Actuators Based on Carbon-Nanotube-Composite Paper

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1463
Author(s):  
Takahiro Ampo ◽  
Takahide Oya
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Carbon Powder ◽  
High Electrical Conductivity ◽  
Soft Actuator ◽  
Highly Efficient ◽  
Semiconducting Properties ◽  
Carbon Nanotube Composite ◽  
Composite Paper

We propose a unique soft actuator—a paper actuator—based on carbon-nanotube-composite paper (CNT-composite paper), which is a composite of carbon nanotubes (CNTs) and paper. CNT-composite paper has highly efficient properties because of the contained CNTs, such as high electrical conductivity and semiconducting properties. We are considering using CNT-composite paper for various devices. In this study, we successfully developed a paper actuator. We determined the structure of the paper actuator by referencing that of bucky-gel actuators. The actuator operates using the force generated by the movement of ions. In addition to making the paper actuator, we also attempted to improve its performance, using pressure as an index and an electronic scale to measure the pressure. We investigated the optimal dispersant for use in paper actuators, expecting the residual dispersant on the CNT-composite paper to affect the performance differently depending on the type of dispersant. Referring to research on bucky-gel actuators, we also found that the addition of carbon powder to the electrode layers is effective in improving the pressure for paper actuators. We believe that the paper actuator could be used in various situations due to its ease of processing.

Electrical conductivity and electromagnetic interference shielding efficiency of carbon nanotube/cellulose composite paper

Carbon ◽  
2008 ◽  
Vol 46 (9) ◽  
pp. 1256-1258 ◽  
Author(s):  
Bunshi Fugetsu ◽  
Eiichi Sano ◽  
Masaki Sunada ◽  
Yuzuru Sambongi ◽  
Takao Shibuya ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Electromagnetic Interference ◽  
Electromagnetic Interference Shielding ◽  
Cellulose Composite ◽  
Composite Paper

A Novel Concept for Highly Oriented Carbon Nanotube Composite Tapes or Fibres with High Strength and Electrical Conductivity

2009 ◽  
Vol 294 (11) ◽  
pp. 749-755 ◽  
Author(s):  
Hua Deng ◽  
Rui Zhang ◽  
Christopher T. Reynolds ◽  
Emiliano Bilotti ◽  
Ton Peijs
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
High Strength ◽  
Carbon Nanotube Composite ◽  
Novel Concept

Multilayered nickel oxide/carbon nanotube composite paper electrodes for asymmetric supercapacitors

2020 ◽  
Vol 354 ◽  
pp. 136744
Author(s):  
Yi-Hsuan Lai ◽  
Shivam Gupta ◽  
Chung-Hsuan Hsiao ◽  
Chi-Young Lee ◽  
Nyan-Hwa Tai
Keyword(s):  
Carbon Nanotube ◽  
Nickel Oxide ◽  
Asymmetric Supercapacitors ◽  
Carbon Nanotube Composite ◽  
Composite Paper

A relationship between electrical conductivity and photodegradation in styrene-butadiene copolymer/multi-wall carbon nanotube composite

2016 ◽  
Vol 74 (4) ◽  
pp. 1193-1206 ◽  
Author(s):  
Hisayuki Nakatani ◽  
Mayumi Hirooka ◽  
Kanae Yamaguchi ◽  
Suguru Motokucho ◽  
Noriyasu Okazaki
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Carbon Nanotube Composite ◽  
Styrene Butadiene ◽  
Multi Wall Carbon Nanotube

Flexible Black-Phosphorus Nanoflake/Carbon Nanotube Composite Paper for High-Performance All-Solid-State Supercapacitors

2017 ◽  
Vol 9 (51) ◽  
pp. 44478-44484 ◽  
Author(s):  
Bingchao Yang ◽  
Chunxue Hao ◽  
Fusheng Wen ◽  
Bochong Wang ◽  
Congpu Mu ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Solid State ◽  
High Performance ◽  
Black Phosphorus ◽  
Carbon Nanotube Composite ◽  
Composite Paper

scholarly journals “Paper Dye-Sensitized Solar Cell” Based on Carbon-Nanotube-Composite Papers

Energies ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 57 ◽  
Author(s):  
Yuya Ogata ◽  
Kodai Iguchi ◽  
Takahide Oya
Keyword(s):  
Solar Cell ◽  
Carbon Nanotube ◽  
Conversion Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Electron Excitation ◽  
Current Collection ◽  
Dye Sensitized ◽  
Carbon Nanotube Composite ◽  
Sensitized Solar Cells ◽  
Composite Paper

We propose a paper solar cell based on carbon nanotube (CNT)-composite papers. To fabricate this cell, we use dye-sensitized solar cells (DSCs) for generating power through the redox reaction of dyes in conjunction with CNT-composite papers, which are composite materials containing CNTs and pulp (raw paper material) that can be fabricated easily by using a method based on the Japanese washi papermaking technique. The demand for CNT applications is expected to increase due to their high conductivity and metallic or semiconducting characteristics. This CNT-composite paper can also have metallic or semiconducting characteristics based on the contained CNTs in the composite paper. We previously fabricated a DSC that generates electricity by using CNT-composite papers stacked in a typical DSC structure. However, the conversion efficiency of this DSC was just 0.188%, which is not practical. To overcome this low power generation issue, we tried improving the DSC structure by applying electrodes to the CNT-composite papers in grid patterns for efficient current collection and applying an optimally mixed dye for efficient electron excitation. Results showed that the conversion efficiency improved to 0.58%. Moreover, we demonstrated that using a mixed dye can improve the conversion efficiency of the paper DSC. We expect these types of CNT-composite papers to be used as material for new DSCs.

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