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Crimped carbon fiber and production method thereof

A carbon fiber and curling technology, applied in the field of curling carbon fiber, can solve the problems of unfavorable surface treatment, unfavorable, low productivity, etc.

Inactive Publication Date: 2006-10-04
SHOWA DENKO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of this material is disadvantageous due to the low productivity and usually high cost of fine fibers
[0014] Similarly, a technique of activating produced carbon fibers by post-processing such as surface treatment and thereby obtaining carbon fibers having a high specific surface area is known, but steps for surface treatment and the like are required and this is disadvantageous

Method used

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  • Crimped carbon fiber and production method thereof
  • Crimped carbon fiber and production method thereof
  • Crimped carbon fiber and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0142] The present invention will be described in more detail below with reference to examples, but the present invention is not limited thereto.

[0143] [Reagent]

[0144] 1. Carbon compounds

[0145] benzene:

[0146] Guarantee reagent, cyclohexane produced by Wako Pure Chemical Industries, Ltd.:

[0147] Guarantee reagent, produced by Wako Pure Chemical Industries, Ltd.

[0148] 2. Catalyst precursor compound

[0149] Ferrocene: produced by Nippon Zeon Co., Ltd.

[0150] 3. Sulfur source

[0151] Sulfur powder:

[0152] Reagent, manufactured by Kanto Chemical Co., Inc.

[0153] Thiophene:

[0154] The guarantee reagent is produced by Wako Pure Chemical Industries, Ltd.

[0155] 4. Additional ingredients

[0156] Polypropylene glycol:

[0157] D-400 (molecular weight: 400, decomposition temperature: 290°C), produced by NOF Corporation

[0158] Liquid paraffin:

[0159] Reagent, produced by Wako Pure Chemical Industries, Ltd.

[0160] [Measurement of specific surface area]

[01...

Embodiment 2-5

[0169] The preparation was performed in the same manner as in Example 1, except that the composition of the reaction solution and the feed amount of the reaction solution were changed as shown in Table 1.

[0170] In Example 2, the appearance is similar to that of Example 1, but the main carbon fiber has the following carbon structure: there is a hollow structure inside, the carbon structure of the inner layer contains a herring-like structure, and the carbon structure of the outer layer is wood The growth ring structure is different from the inner part.

[0171] In Examples 3-5, the appearance is similar to that of Example 1, which is curled. The observed carbon fiber is (i) a carbon fiber with a carbon structure in which there is a hollow structure inside, the carbon structure of the inner layer part contains a herring-like structure, and the carbon structure of the outer layer part is a tree growth ring structure and is incompatible with the inner The layer parts are different; (...

Embodiment 6

[0173] The carbon fiber obtained in Example 1 was treated at 1,100°C for 10 minutes in an argon stream. The fiber outer diameter and fiber length did not change during the period before and after the treatment. The specific surface area is 100m 2 / g and there is no change from before treatment. The appearance of the carbon fiber was crimped and did not change during the period before and after the treatment. The carbon structure is the same as that before the treatment, and the carbon fiber is the following mixture (i) a carbon fiber having a carbon structure in which there is a hollow structure inside, the carbon structure of the inner layer part contains a herring-like structure and the carbon fiber of the outer layer part The structure is a tree growth ring structure and is different from the inner layer part; (ii) Carbon fiber with the following carbon structure, in which there is no hollow structure inside, the carbon structure of the inner layer part is a plate-like structur...

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Abstract

A crimped carbon fiber having a multilayer structure comprising a hollow structure in the inside, with the inner layer part having a carbon structure containing a herringbone structure and the outer layer part having a carbon structure differing from the carbon structure of the inner layer part. A method for producing a crimped carbon fiber, comprising contacting a carbon source and / or a catalyst source with a sulfur source in a heating zone to produce a vapor grown carbon fiber, wherein the ratio of the molar number of sulfur atom in the sulfur source to the molar number of the catalyst metal atom is 2.0 or more.

Description

[0001] Cross reference of related applications [0002] This application is an application filed in accordance with 35U.SC Section 111(a). It is a provisional application filed on September 3, 2003 in accordance with 35U.SC Section 119(e)(1) in accordance with 35U.SC Section 111(b) The filing date of No.60 / 499,367. Technical field [0003] The present invention relates to a crimped carbon fiber, which is suitably used, for example, as a filler for improving electrical conductivity or thermal conductivity by adding it to various materials such as metals, resins, and ceramics; used as electron emission for FED (Field Emission Display) Material; used as a medium for storing hydrogen, methane or various gases; used as a filler for materials that improve the performance of various batteries; or used as a catalyst carrier, and also relates to its preparation method. Background technique [0004] Research on vapor-grown carbon fibers began in the late 1980s, and it has been found that wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/127
Inventor 神原英二辻胜行
Owner SHOWA DENKO KK