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Preparation method of graphene/carbon fiber composite

A composite material and carbon fiber technology, used in carbon fiber, fiber treatment, electrolytic coatings, etc., can solve the problems of less active carbon atoms at the edge, inert surface of carbon fiber, small specific surface area, etc., and achieve large specific surface area and large reactive sites. , to avoid damaging effects

Active Publication Date: 2014-03-05
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Examples

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Effect test

Embodiment 1

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

[0047] (1) Preparation of graphene dispersion

[0048] Take 1g of natural flake graphite that has passed through a 32-mesh sieve, add 1L of 1-methyl-2-pyrrolidone, and place it in an ultrasonic instrument with a temperature of 20-40°C and a power of 200W for 10h to obtain a dispersion;

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

[0050] (2) According to the ratio of organic amine salt: 1-methyl-2-pyrrolidone to 1g:1L, dissolve 0.005g organic amine salt in 5ml 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 50 ml of the graphene dispersion obtained in step (1), that...

Embodiment 2

[0060] A preparation method of graphene / carbon fiber composite material specifically includes 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) Use the positively charged graphene dispersion obtained in step (2) as the electrolyte of the electrophoretic deposition cell in the electrophoretic deposition cell;

[0064] Use sandpaper to polish and blow dry the stainless steel sheet as the positive pole piece;

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

[0066] In the above electrophoretic deposition process, the distance between the positive and negative plates is controlled to 15mm, the applied DC voltage is 90V, the electrophoretic deposition time is 10min, and the deposition temperature is 60°C;

[0067] Repeat the above ele...

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Abstract

The invention discloses a preparation method of a graphene / carbon fiber composite. The preparation method comprises the steps: firstly, with graphite powder or natural flake graphite as the raw material, directly and ultrasonically stripping the graphite powder or natural flake graphite in an organic solvent to prepare a graphene dispersing solution; then, adding an organic amine salt with aromatic groups into the obtained graphene dispersing solution to enable the graphene to have positive charges because of adsorbing organic amine ions; next, depositing the graphene with the positive charges on carbon fiber or a carbon fiber product under the action of an external electric field to form the graphene / carbon fiber composite with the organic amine salt; and finally, removing the organic amine salt through thermal treatment to obtain the graphene / carbon fiber composite, wherein the organic amine salt is deposited in an electrophoresis deposition process. The method has the advantages of simplicity in operation, low cost, good uniformity of the graphene / carbon fiber composite, easiness for 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 Applications(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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