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Chopped fiber carbon fiber composite material and preparation method thereof

A technology of chopped carbon fiber and composite materials, which is applied in the field of chopped fiber carbon fiber composite materials and its preparation, can solve the problems of inability to obtain subsequent use, energy waste, etc., and achieve increased surface oxidation resistance, reduced energy consumption, and high purity Effect

Pending Publication Date: 2020-11-10
江苏米格新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Carbon fiber soft felt is one of the main insulation materials. After cutting according to the size required by customers, there will be a large amount of leftover material, which cannot be used later and can only be discarded, resulting in energy waste.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation method of the chopped fiber carbon fiber composite material of the present embodiment comprises the following steps:

[0030] 1. Grinding of carbon fiber raw materials: After grinding and chopping the scraps of carbon fiber / fiber mat, sub-sieve to obtain 1-3mm chopped carbon fibers;

[0031] 2. Deposition molding: 12kg chopped carbon fiber is dropped into the mold cavity, deposited and formed, and the short fiber embryo body with smooth surface and uniform thickness is obtained by airflow carding;

[0032] 3. Resin impregnation: inject the resin with a viscosity of 1.5pa.s into the mold with the short fiber embryo body, after the short fiber embryo body is completely impregnated, the excess resin is sucked out to obtain the short fiber infiltration embryo body;

[0033] 4. Mold injection liquid: Inject the resin-infiltrated short fiber into the embryo body mold with a potential mesophase asphalt liquid with a softening point of 45°C, and extract the exce...

Embodiment 2

[0044] The preparation method of the chopped fiber carbon fiber composite material of the present embodiment comprises the following steps:

[0045] 1. Grinding of carbon fiber raw materials: After grinding and chopping the scraps of carbon fiber / fiber mat, sub-sieve to obtain 2.5-3.2mm chopped carbon fibers;

[0046] 2. Deposition molding: 15kg chopped carbon fiber is dropped into the mold cavity, deposited and formed, and the short fiber embryo body with smooth surface and uniform thickness is obtained by airflow carding;

[0047] 3. Resin impregnation: inject the resin with a viscosity of 2.5pa.s into the mold with the short fiber embryo body, after the short fiber embryo body is completely impregnated, the excess resin is sucked out to obtain the short fiber infiltration embryo body;

[0048] 4. Molding liquid injection: Inject the resin-infiltrated short fibers into the embryo body mold and inject the asphalt liquid after heating and dissolving the potential mesophase pit...

Embodiment 3

[0059] The preparation method of the chopped fiber carbon fiber composite material of the present embodiment comprises the following steps:

[0060] 1. Grinding of carbon fiber raw materials: After grinding and chopping the scraps of carbon fiber / fiber mat, sub-sieve to obtain 3.5-4.5mm chopped carbon fibers;

[0061] 2. Deposition molding: 18kg chopped carbon fiber is put into the mold cavity, deposited and formed, and the short fiber embryo body with smooth surface and uniform thickness is obtained by airflow carding;

[0062] 3. Resin impregnation: inject the resin with a viscosity of 0.8pa.s into the mold with the short fiber embryo body, after the short fiber embryo body is completely impregnated, the excess resin is sucked out to obtain the short fiber infiltration embryo body;

[0063] 4. Molding liquid injection: Inject the resin-infiltrated short fibers into the embryo body mold and inject the asphalt liquid after heating and dissolving the potential mesophase pitch w...

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Abstract

The invention relates to a chopped fiber carbon fiber composite material and a preparation method thereof, and belongs to the technical field of carbon fiber composite material preparation. The preparation method comprises the following steps: 1, grinding a carbon fiber raw material; 2, carrying out short fiber deposition molding; 3, carrying out resin impregnation; 4, forming a mold and injectingliquid, namely putting the resin-infiltrated fiber blank into the mold for forming the mold, and injecting a potential mesophase pitch liquid at the same time; 5, performing high-pressure forming heat treatment: subjecting the infiltrated fiber blank containing the asphalt liquid to heat treatment under high pressure and then condensing the fiber blank to obtain a cured blank; 6, carbonization heat treatment: demolding the cured blank body and then carbonizing to obtain a carbonized blank body; and 7, high-temperature graphitization: carrying out high-temperature graphitization treatment on the carbonized blank to obtain the finished product carbon fiber composite material. The chopped fiber carbon fiber composite material prepared by the invention has high purity and greatly improved compression strength and bending strength, solves the problem of corner solid waste, realizes recycling of the material and generates good economic benefits.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber composite material preparation, in particular to a chopped fiber carbon fiber composite material and a preparation method thereof. Background technique [0002] Carbon fiber composite material usually refers to a composite material with resin as the matrix and carbon fiber as the reinforcement. In recent years, breakthroughs in the technical barriers of thin film materials have led to the rapid development of the photovoltaic industry. Single crystal furnaces and polycrystalline ingot furnaces used in photovoltaics are used as high-temperature and high-energy The consumption furnace body has a sharp increase in demand for materials that can reduce energy consumption and have high specific strength, high purity, corrosion resistance, high temperature resistance, and excellent thermal insulation properties. The demand for ultra-high temperature heat treatment furnaces used in aerospace, powder ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/52C04B35/622
CPCC04B35/83C04B35/522C04B35/622C04B2235/6562C04B2235/6567C04B2235/77C04B2235/96C04B2235/9607
Inventor 李凯陈新华袁豪雄
Owner 江苏米格新材料股份有限公司
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