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Graphene carbon fibers as well as preparation method and application thereof

A carbon fiber and carbon fiber technology, applied in the field of graphene carbon fiber preparation, can solve the problems of weak carrying capacity, uneven distribution of electron clouds, long cracks, etc., to improve electrical conductivity and thermal conductivity, increase electron transport efficiency, good The effect of electrical and thermal conductivity

Active Publication Date: 2018-04-20
北京北方国能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the pores are stress concentration areas, and the bearing capacity is weak. When the force is applied, the pores expand and form long cracks, which are damaged.
[0004] Because there are many large hole defects between the carbon fiber layers, the electron cloud distribution is uneven, the electron transmission is hindered, and the electrical and thermal conductivity of the material is not good.

Method used

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  • Graphene carbon fibers as well as preparation method and application thereof

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preparation example Construction

[0029] figure 1 The process flow chart of the preparation method of the graphene carbon fiber provided by the present invention. see figure 1 , a kind of preparation method of graphene carbon fiber, comprises the steps:

[0030] (1) Preparation of alloy complex solution: Add copper-chromium alloy additives into water and stir for 10-15 minutes, then add iron-nickel alloy additives, and continue stirring and reacting at 80-90°C for 4-8 hours. Add the copper-chromium alloy additive to the water first, mix the water and the copper-chromium alloy additive evenly, reduce the concentration of the copper-chromium alloy additive, and avoid the violent reaction between the two when adding the iron-nickel alloy additive, and then add the iron-nickel alloy additive Auxiliaries, so that the two react at a certain temperature to form an alloy complex solution, so that it can be used as a catalyst for subsequent reactions and has a good catalytic effect.

[0031] Preferably, the mass rat...

Embodiment 1

[0058] A kind of preparation method of graphene carbon fiber, comprises the steps:

[0059] (1) Add carbon fiber to the alloy complex solution and impregnate for 30 minutes to obtain carbon fiber wet material.

[0060] (2), drying carbon fiber wet material to obtain carbon fiber dry material.

[0061] (3) After heating the carbon fiber dry material to 600° C. under an inert gas atmosphere, pass through the multi-carbon cracking gas to react for 0.5 h.

Embodiment 2

[0063] A kind of preparation method of graphene carbon fiber, comprises the steps:

[0064] (1) Preparation of alloy complex solution: Add copper-chromium alloy additives into a stirred reactor equipped with deionized water and stir for 10 minutes, then add iron-nickel alloy additives and continue to stir and react for 4 hours at 90°C to obtain alloy complexes Mixed liquid, wherein, the mass ratio of copper-chromium alloy additives to water is 1:30, and the mass ratio of copper-chromium alloy additives to iron-nickel alloy additives is 1:1.

[0065] (2) Stop the stirring of the stirring reactor, add chopped carbon fiber to the alloy complex solution and impregnate for 15 minutes to obtain a carbon fiber wet material, wherein the mass ratio of the chopped carbon fiber to the alloy complex solution is 1:8.

[0066] (3) Evenly put the carbon fiber wet material on a tray, place it in an electric heating oven, and dry it for 4 hours at a temperature of 160° C. to obtain a carbon fi...

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Abstract

The invention provides graphene carbon fibers as well as a preparation method and application thereof, which belong to the technical field of graphene and carbon fiber composite materials. The preparation method of the graphene carbon fibers comprises the following steps: adding carbon fibers into an alloy complexing solution, soaking for 15 to 30 min, and obtaining wet carbon fiber material; drying the wet carbon fiber material to obtain dry carbon fiber material comprising active additives; after heating the dry carbon fiber material in an inertial gas atmosphere to 600 to 900 DEG C, introducing polycarbon pyrolysis gas, and performing the CVD reaction for 0.5 to 2 hours under the catalytic pyrolysis effect of the active additives. By virtue of the preparation method, the graphene growsin an in-situ precipitation manner among the carbon fiber layers, so that the interlayer structure is improved, and the obtained graphene carbon fibers have good electric conductivity and heat conductivity and can be used as a novel electric conducting and heat conducting composite material.

Description

technical field [0001] The invention relates to the technical field of carbon fiber composite materials, in particular to a graphene carbon fiber, its preparation method and its application. Background technique [0002] Carbon fiber (CF for short) is a new type of fiber material with high strength and high modulus fibers with a carbon content of more than 95%. It is a microcrystalline graphite material obtained by stacking organic fibers such as flake graphite microcrystals along the axial direction of the fiber, and undergoing carbonization and graphitization. Carbon fiber is "soft on the outside and rigid on the inside", lighter than metal aluminum, but stronger than steel, and has the characteristics of corrosion resistance and high modulus. It is an important material in national defense and civilian applications. It not only has the inherent intrinsic characteristics of carbon materials, but also has the softness and processability of textile fibers. It is a new gener...

Claims

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Application Information

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IPC IPC(8): D06M11/74C09K5/14H01B1/04D06M101/40
CPCC09K5/14D06M11/74D06M2101/40H01B1/04
Inventor 董前程孙久铭曾云张朋李正宏
Owner 北京北方国能科技有限公司