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Preparation method of vertical graphene carbon fiber composite

A carbon fiber, vertical technology, applied in the field of preparation of vertical graphene carbon fiber composites, can solve the problems of uneven heating, graphene film-forming consistency and uniformity, limited stability improvement, etc., to achieve composite tightness Reliable, simple preparation process, and the effect of improving interface performance

Pending Publication Date: 2021-11-09
CHONGQING XINHE QIYUE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the quartz tube as a container limits the maximum temperature of the reaction. Secondly, the volume of the quartz tube also limits the production efficiency. If a large quartz tube is used, it is difficult to heat the sample evenly inside the quartz tube in a short period of time.
Although the way of reel linkage can definitely improve the horizontal production efficiency, the external heating also has uneven heating during the moving process, which makes the consistency and uniformity of graphene film formation different and unstable, and the quality is difficult to control
[0007] The method disclosed above is mainly to coat a layer of graphene on the surface of carbon fiber to form a composite material of graphene carbon fiber, but since carbon fiber and graphene are essentially two separate components, the stability of the composite material is not high. , followed by a layer of thin film on the surface of the composite material, which has limited improvement in stability when bonding with the resin matrix.
At the same time, there is also a design that uses reel linkage to improve production efficiency, but the matching equipment cannot meet the expectations of mass production, and needs to be redesigned and developed

Method used

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  • Preparation method of vertical graphene carbon fiber composite
  • Preparation method of vertical graphene carbon fiber composite
  • Preparation method of vertical graphene carbon fiber composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation of embodiment 1 vertical graphene carbon fiber

[0042] Vertical graphene carbon fiber preparation process:

[0043] (1) Put the carbon fiber fibrils into the stainless steel vacuum chamber. The carbon fiber fibrils are evenly spread on the left and right rollers, and the left and right ends are wound on the driving rollers. The section between the two rollers is carbon fiber graphene In the composite deposition section, the number of carbon fiber fibrils placed horizontally is 10,000, and the speed of the driving roller is set to 50mm / s.

[0044] (2) Set the area to 125mm 2 The two square electrode plates are placed above and below the carbon fiber fibrils between the two rollers respectively, and are parallel to the carbon fiber fibrils. The distance between the positive and negative electrodes is set to 500mm.

[0045] (3) Close the PECVD chamber door, open the pumping valve assembly, and pump the vacuum in the chamber to 1.0×10 -2 Torr below.

[...

Embodiment 2

[0055] The preparation of embodiment 2 vertical graphene carbon fiber composites

[0056] The preparation process refers to Example 1, and the difference from Example 1 is that the step (7) of the vertical graphene-reinforced carbon fiber preparation process part of the driving roller speed is set to 200mm / s. The remaining steps and process parameters are the same, and the vertical graphene (reinforced) carbon fiber composite is prepared.

[0057] Effect test:

[0058] After testing, the vertical graphene-reinforced carbon fiber obtained in Example 2, wherein the graphene distribution is uniform and firm, does not fall off, and increases the specific surface area of ​​the carbon felt. The specific relevant performance data are as follows:

[0059] The thickness of the graphene sheet in the vertical graphene-reinforced carbon fiber of Example 2 is 1-250nm, and the height is 10-500nm.

Embodiment 3

[0060] The preparation of embodiment 3 vertical graphene carbon fiber composites

[0061] The preparation process is with reference to Example 1, and the difference from Example 1 is that the step (4) H of the vertical graphene reinforced carbon fiber preparation process part 2 with CH 4 The mixture gas ratio is H 2 :CH 4 =10:3 molar ratio. The remaining steps and process parameters are the same, and the vertical graphene (reinforced) carbon fiber composite is prepared.

[0062] Effect test:

[0063] After testing, the vertical graphene-reinforced carbon fiber obtained in Example 3, wherein the graphene distribution is uniform and firm, does not fall off, and increases the specific surface area of ​​the carbon felt. The specific relevant performance data are as follows:

[0064] The thickness of the graphene sheet in the vertical graphene-reinforced carbon fiber of Example 3 is 20-800nm, and the height is 60-1200nm.

[0065] The upright graphene carbon fiber compound tha...

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Abstract

The invention discloses a preparation method of a vertical graphene carbon fiber composite. The method adopts PECVD (Plasma Enhanced Chemical Vapor Deposition), dissociates a carbon-containing gas source through a direct current plasma enhancement mode, and grows a vertical graphene sheet layer in situ on a carbon fiber so as to prepare the graphene carbon fiber composite, and in the method, the graphene carbon fiber composite is placed in a roll-to-roll mode, and a rolling shaft rotates to drive the carbon fibers to move, so that continuous and large-batch production is realized. According to the graphene carbon fiber obtained by the method, the graphene sheet layer and the carbon fiber are in in-situ growth and are very firm, the surface area of the carbon fiber is effectively increased, the interface performance of the carbon fiber is improved and enhanced, and relatively strong mechanical meshing force can be generated between the carbon fiber and a resin matrix.

Description

technical field [0001] The invention belongs to the field of carbon fiber composite materials, and relates to a preparation method of a vertical graphene carbon fiber composite material. The vertical graphene carbon fiber composite material can enhance the interface performance of the material. [0002] technical background [0003] Carbon fiber refers to a fiber material with a carbon content of more than 85% after high-temperature carbonization. As a high-performance fiber, carbon fiber has become an important reinforcing material for resin-based composite materials in recent years because of its high specific strength, high specific modulus, small thermal expansion coefficient, low friction coefficient, and good low temperature resistance. In the fields of aircraft, satellites, missiles, automobiles, electronics, sports and so on. However, because the surface of carbon fiber is inert, the specific surface area is small, the edge active atoms are few, the surface energy is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M10/06
CPCD06M10/06
Inventor 黄世耀罗理石雷
Owner CHONGQING XINHE QIYUE TECH CO LTD