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A kind of preparation method of graphene/carbon fiber composite material

A composite material and carbon fiber technology, used in carbon fiber, fiber treatment, electrolytic coatings, etc., can solve the problems of small specific surface area, less active carbon atoms at the edge, and inert carbon fiber surface, and achieve large specific surface area, avoid damage, and large reactions. The effect of the active site

Active Publication Date: 2015-09-30
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for preparing graphene / carbon fiber composite materials by electrophoretic deposition in order to solve the problems that the surface of carbon fiber is inert, the specific surface area is small, and the edge active carbon atoms are few.

Method used

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  • A kind of preparation method of graphene/carbon fiber composite material
  • A kind of preparation method of graphene/carbon fiber composite material
  • A kind of preparation method of graphene/carbon fiber composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0046] A preparation method of graphene / carbon fiber composite material, specifically comprising the following steps:

[0047] (1) Preparation of graphene dispersion

[0048] Take 1g of natural flake graphite passed through a 32-mesh sieve, add 1L of 1-methyl-2-pyrrolidone, place it in an ultrasonic instrument, control the temperature at 20-40°C, and perform ultrasonication at 200W for 10 hours to obtain a dispersion;

[0049] Then, the dispersion liquid obtained above is centrifuged under the condition of 4000r / min for 1h, and the supernatant liquid obtained is the graphene dispersion liquid, and the solid content in the graphene dispersion liquid is 0.02g / L;

[0050] (2) According to the ratio of organic amine salt: 1-methyl-2-pyrrolidone of 1g:1L, dissolve 0.005g of organic amine salt in 5ml of 1-methyl-2-pyrrolidone to obtain an organic amine salt solution. The organic amine salt is aniline hydrochloride;

[0051] Add the organic amine salt solution obtained above to 50ml ...

Embodiment 2

[0060] A preparation method of graphene / carbon fiber composite material, specifically comprising the following steps:

[0061] (1), the preparation process of the graphene dispersion is the same as in Example 1;

[0062] (2), the preparation process of the positively charged graphene dispersion is the same as in Example 1;

[0063] (3), in the electrophoretic deposition tank, the positively charged graphene dispersion obtained in step (2) is used as the electrolyte of the electrophoretic deposition tank;

[0064] The stainless steel sheet that was polished and washed with sandpaper and then dried was used as the positive electrode sheet;

[0065] Use carbon fiber products, that is, carbon fiber paper, as the negative pole piece for electrophoretic deposition;

[0066] During the above electrophoretic deposition process, the distance between the positive and negative electrodes was controlled to be 15mm, the applied DC voltage was 90V, the electrophoretic deposition time was ...

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Abstract

The invention discloses a preparation method of a graphene / carbon fiber composite material, that is, firstly, graphite powder or natural flake graphite is used as a raw material, and a graphene dispersion liquid is prepared by direct ultrasonic peeling in an organic solvent, and then added to the obtained graphene dispersion liquid Organic amine salts containing aromatic groups. Graphene absorbs organic amine ions and is positively charged. Then, under the action of an external electric field, the positively charged graphene is deposited on carbon fibers or carbon fiber products to form organic amine salts. The graphene / carbon fiber composite material, and finally the organic amine salt deposited in the electrophoretic deposition process is removed by heat treatment to obtain the graphene / carbon fiber composite material. The method has the advantages of simple operation, low cost, good product uniformity, easy control and the like.

Description

technical field [0001] The invention relates to the technical field of preparation of composite carbon materials, and in particular to a method for preparing graphene / carbon fiber composite materials. Background technique [0002] Carbon fiber refers to a fiber material that has been carbonized at a high temperature and contains more than 85% carbon, including carbon fiber and graphite fiber. Common carbon fibers are polypropylene-based carbon fibers, pitch-based carbon fibers and viscose-based carbon fibers. Carbon fiber has the characteristics of light weight, high temperature resistance, good mechanical properties, dimensional stability and chemical stability. It has a wide range of applications in aerospace, automobile, electronics, machinery and many other fields. [0003] However, the carbon fiber surface is inert, the specific surface area is small, the edge active carbon atoms are less, the surface energy is low, the wettability of the resin and the bonding of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/74D06M13/463C25D13/02C25D13/12D06M101/40
Inventor 张全生夏骥郭东莉李硕闵凡奇
Owner SHANGHAI INST OF TECH
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