Composite carbon fiber

一种复合碳纤维、纤维径的技术，应用在纤维处理、纤维的混合、纤维化学特征等方向，能够解决结晶性低、导电性低等问题，达到改善容量维持率的效果

Active Publication Date: 2014-01-22
RESONAC CORPORATION
View PDF5 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The multiwalled carbon nanotubes obtained by this method (hereafter, the multiwalled carbon nanotubes synthesized by the floating catalyst method with a fiber diameter of 50 nm or more are referred to as carbon nanofibers) are electrically conductive because they are covered with pyrolytic carbon with low crystallinity. lower

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite carbon fiber
  • Composite carbon fiber
  • Composite carbon fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0090] Examples of the present invention are shown below, and the present invention will be described more specifically. Furthermore, they are only examples for illustration, and the present invention is not limited by them in any way.

[0091] The properties and the like of the multilayered carbon nanotubes and carbon nanofibers were measured as follows.

[0092]

[0093] The object obtained by attaching the sample powder to a carbon tape and depositing gold was used as an observation sample, and the observation was carried out by JSM-6390 manufactured by JEOL Ltd.

[0094] scattered state

[0095] Observing a 10 field of view at a magnification of 20 k by a scanning electron microscope, it was determined whether the carbon nanofibers penetrated through the gaps of the carbon nanotubes disentangled into a loose state, and the disentangled carbon nanotubes were entangled in the vicinity of the surface of the carbon nanofibers. . The case where the above-mentioned dispe...

manufacture example 1

[0128] Production Example 1 (Catalyst Preparation)

[0129] Aluminum hydroxide (HIGILITE (registered trademark) M-43 manufactured by Showa Denko Co., Ltd.) was heat-treated at 850° C. for 2 hours in an atmosphere flowing with air to prepare a carrier.

[0130] 50 g of pure water was added to a 300 ml tall measuring cup, and 4.0 g of a carrier was added thereto and dispersed to prepare a carrier slurry.

[0131] 16.6 g of pure water was put into a 50 ml beaker, and 0.32 g of hexaammonium heptamolybdate tetrahydrate (manufactured by Junsei Chemical Co., Ltd.) was added and dissolved. Then, 7.23 g of iron (III) nitrate nonahydrate (manufactured by Kanto Chemical Co., Ltd.) was added and dissolved to prepare a catalyst solution.

[0132] Further, 32.7 g of pure water was put into another 50 ml beaker, and 8.2 g of ammonium carbonate (manufactured by Kanto Chemical Co., Ltd.) was added and dissolved therein to prepare a pH adjustment solution.

[0133] A stirring bar was placed i...

manufacture example 2

[0134] Production Example 2 (Synthesis of Multiwalled Carbon Nanotubes: MWCNT)

[0135] 1.0 g of the catalyst obtained in Production Example 1 was placed on a quartz boat. It was placed in the center of a horizontal tubular furnace (quartz tube: inner diameter 50 mm, length 1500 mm, soaking belt 600 mm). The temperature was raised to 680° C. over 30 minutes while circulating nitrogen gas at 500 ml / min in the horizontal tubular furnace. Then, the supply of nitrogen gas was stopped, a mixed gas of ethylene and hydrogen (ethylene concentration of 50% by volume) was circulated at 2000 ml / min, and the reaction was carried out for 20 minutes to synthesize multi-walled carbon nanotubes. The supply of the mixed gas was stopped, nitrogen gas was supplied, the mixture was cooled to room temperature, and the multilayered carbon nanotubes were taken out from the furnace.

[0136] Table 1 shows the fiber shape and the physical properties of the powder. exist figure 2 Transmission elec...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to view more

Abstract

An object of the present invention is to provide composite carbon fibers in which multiwalled carbon nanotubes are homogeneously dispersed between graphitized carbon nanofibers and near the surface of the graphitized carbon nanofibers, the composite carbon fibers being capable of easily being dispersed in a matrix such as resin without leaving aggregates, and also imparting low resistance. Disclosed are composite carbon fibers comprising multiwalled carbon nanotubes having a fiber diameter of 5 nm or more and 30 nm or less and graphitized carbon nanofibers having a fiber diameter of 50 nm or more and 300 nm or less, wherein the multiwalled carbon nanotubes are homogeneously dispersed between the graphitized carbon nanofibers and near the surface of the graphitized carbon nanofibers.

Description

technical field [0001] The present invention relates to composite carbon fibers. In more detail, the present invention relates to a composite carbon fiber which does not leave aggregates in a matrix such as resin but is easily dispersed and is excellent in the effect of imparting low resistance, wherein multilayered carbon nanotubes are uniformly dispersed in graphitized carbon nanotubes. between fibers and near the surface of graphitized carbon nanofibers. Background technique [0002] As methods for producing multiwalled carbon nanotubes, there are chemical vapor deposition (a method of thermally decomposing hydrocarbons and the like on a catalyst metal to form multiwalled carbon nanotubes) and physical vapor deposition (sublimation of graphite by arc, laser, etc.) and the method of forming multi-layered carbon nanotubes during cooling). The chemical vapor deposition method is a method suitable for large-scale synthesis because it is relatively easy to expand the scale o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y30/00B82Y40/00H01M4/62H01M4/133H01M4/02H01M4/13
CPCC01B31/0226D01G13/00D06M10/00C08J5/06C01B2202/36H01B1/04H01M4/625D02G3/045C08J5/042Y02E60/122D01F9/127B82Y30/00B82Y40/00C01B32/16Y10T428/2918Y02E60/10D01F9/12D04H1/4242H01M4/13
Inventor 山本竜之中村武志
Owner RESONAC CORPORATION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap