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Carbon film and method for producing same, and fibrous carbon nanostructure dispersion and method for producing same

A technology of nanostructure and fibrous carbon, which is applied in the direction of carbon nanotubes, single-walled carbon nanotubes, and nanocarbons, and can solve the problems of poor handling and processability

Active Publication Date: 2021-07-30
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, since fibrous carbon nanostructures such as CNTs are fine structures with a diameter of nanometers, the handling and processability of the monomer is poor.

Method used

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  • Carbon film and method for producing same, and fibrous carbon nanostructure dispersion and method for producing same
  • Carbon film and method for producing same, and fibrous carbon nanostructure dispersion and method for producing same
  • Carbon film and method for producing same, and fibrous carbon nanostructure dispersion and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0213]

[0214] According to the hypergrowth method described in Japanese Patent No. 4621896, SGCNT (CNT1) as a fibrous carbon nanostructure was synthesized under the following conditions.

[0215] Raw material carbon compound: ethylene; supply speed 50sccm

[0216] Environment (Gas): Helium / Hydrogen Mixed Gas; Supply Speed ​​1000sccm

[0217] ·Pressure: 1 atmosphere

[0218] ·Water vapor addition amount: 300ppm

[0219] ·Reaction temperature: 750℃

[0220] Response time: 10 minutes

[0221] Metal catalyst: iron thin film (thickness 1nm)

[0222] · Substrate: silicon wafer.

[0223] The BET specific surface area of ​​the obtained CNT1 is 1050m 2 / g, the t-curve is in a convex shape, and in the measurement using a Raman spectrophotometer, at 100 to 300 cm, one of the characteristics of single-walled carbon nanotubes -1 The spectrum of the radial breathing mode (RBM) was observed in the low frequency region of . In addition, the average diameter (Av) of CNT1 was 3.3 nm...

Embodiment 2

[0230] In the preparation of the fibrous carbon nanostructure dispersion in Example 1, the dispersion treatment was carried out by setting the pressure applied to the rough dispersion to 250 MPa and the average number of dispersion treatments θ to 5. In the same manner as in Example 1, a CNT dispersion 2 and a carbon film 2 as a fibrous carbon nanostructure dispersion were obtained.

[0231] In addition, the dispersion rate of the CNT dispersion liquid 2 was 93.2%. In addition, the film thickness of the carbon film 2 was 47 μm, the glossiness of the film surface at 60°C was 15, and the electrical conductivity was 250 S / cm.

Embodiment 3

[0233] In the preparation of the fibrous carbon nanostructure dispersion in Example 1, the dispersion treatment was carried out by setting the pressure applied to the rough dispersion to 50 MPa and the average number of dispersion treatments θ to 20. In the same manner as in Example 1, a CNT dispersion 3 and a carbon film 3 as a fibrous carbon nanostructure dispersion were obtained.

[0234] In addition, the dispersion rate of the CNT dispersion liquid 3 was 97.2%. In addition, the film thickness of the carbon film 3 was 52 μm, the glossiness of the film surface at 60°C was 28, and the electrical conductivity was 340 S / cm.

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Abstract

An object of the present invention is to provide a carbon film having excellent electrical conductivity and a method for producing the same. The glossiness of the film surface at 60°C of the carbon film of the present invention is 2 or more and 500 or less. In addition, the method for producing a carbon film of the present invention includes a step of forming a carbon film by removing the solvent from a fibrous carbon nanostructure dispersion liquid containing a fibrous carbon nanostructure and a solvent.

Description

technical field [0001] The present invention relates to a carbon film and a method for producing the same, as well as a fibrous carbon nanostructure dispersion and a method for producing the same. Background technique [0002] In recent years, fibrous carbon nanostructures such as carbon nanotubes (hereinafter, sometimes referred to as "CNT") have attracted attention as materials excellent in electrical conductivity, thermal conductivity, and mechanical properties. [0003] However, since a fibrous carbon nanostructure such as CNT is a fine structure with a diameter of nanometer size, it is poor in handling and processability of a single body. Therefore, a technology has been proposed in which a plurality of CNTs are aggregated into a film to form a carbon nanotube film sometimes called "Buckypaper" (hereinafter, sometimes referred to as a "CNT film"), and This CNT film is used as a conductive film or the like. Specifically, a technique has been proposed in which a dispers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/15
CPCB82Y30/00C01B32/05C01B32/174C01B32/16C01B2202/02H01B1/04C01B32/17C01B32/159C01B32/162C01B32/154C01B32/178B82Y40/00
Inventor 长宗勉上岛贡山岸智子
Owner ZEON CORP