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A kind of preparation method of high-strength lightweight carbon fiber composite material

A technology of carbon composite materials and composite materials, applied in the field of preparation of carbon materials, to achieve the effects of high tensile strength, strong operability, and excellent thermal stability

Active Publication Date: 2016-02-17
南京白港复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, there is no complete research on the preparation method of high-strength lightweight carbon / carbon composite materials by liquid phase impregnation-carbonization method.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Coat the sizing agent on the surface of the continuous filament carbon fiber, and then pyrolyze it at 800°C under the protection of nitrogen to remove the oxygen-containing functional groups on the surface of the carbon fiber and expose the naked surface of the carbon fiber, and then the pretreated continuous filament carbon fiber Winding to make a preformed green body of conical carbon fiber composite material with a high degree of orientation, using the preformed green body of carbon fiber as a reinforced skeleton; wherein, the body density of the preformed green body of carbon fiber is 0.5g / cm 3 ; The sizing agent is composed of 10 parts by weight of polyphenylquinoxaline PPQ, 20 parts of boron modified phenolic resin and 50 parts of epoxy resin emulsion;

[0018] According to the mass ratio of preformed body: silicon carbide powder: mica powder: bentonite = 2:1:0.8:1, respectively weigh silicon carbide powder, mica powder, and bentonite with a particle size of 10...

Embodiment 2

[0024] (1) Coat the sizing agent on the surface of the continuous filament carbon fiber, and then pyrolyze it at 1200°C under the protection of nitrogen to remove the oxygen-containing functional groups on the surface of the carbon fiber and expose the naked surface of the carbon fiber, and then the pretreated continuous filament carbon fiber Winding to make a preformed green body of conical carbon fiber composite material with a high degree of orientation, using the preformed green body of carbon fiber as a reinforced skeleton; wherein, the body density of the preformed green body of carbon fiber is 0.4g / cm 3 ; The sizing agent is composed of 13 parts by weight of polyphenylquinoxaline PPQ, 28 parts of boron modified phenolic resin and 63 parts of epoxy resin emulsion;

[0025] According to the mass ratio of preformed body: silicon carbide powder: mica powder: bentonite = 2:1:0.8:1, respectively weigh silicon carbide powder, mica powder, and bentonite with a particle size of 1...

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Abstract

The invention relates to a preparation method of a high-strength light carbon fiber composite material. The preparation method comprises the following steps: 1, applying a sizing agent to the surfaces of continuous filament carbon fibers, and then winding the preprocessed continuous filament carbon fibers to form a highly oriented preformed blank of a cone-shaped C / C composite material; (2) immersing the preformed blank obtained in the step 1 in vacuum; (3) performing pressure carbonization on prepreg obtained in the step (2) under the protection of nitrogen, soaking into an impregnant solution to fill in the voids, and then performing CVD; (4) graphitizing a product obtained in the step (3), immersing and then performing the CVD; and (5) activating the compact C / C composite product obtained in the step (4) by use of water vapor to obtain a high-strength light C / C composite material. The high-strength light C / C composite material has the tensile strength of 800MPa or above, the thermal conductivity is 500-530W / (m.K) and the thermal diffusivity is 4.4cm2 / s.

Description

technical field [0001] The invention relates to a method for preparing a carbon material, in particular to a method for preparing a carbon fiber composite material. Background technique [0002] Carbon / carbon (C / C) composite material is an inorganic non-metallic matrix composite material composed of carbon fiber and carbon matrix. It has high modulus, high strength, wear resistance, corrosion resistance, good vibration absorption, especially excellent thermal Stability and thermal shock resistance, little loss of mechanical strength at high temperature. Since its development in the 1960s, it has become a new type of material that has been researched and developed in the world's high-tech fields. It has important application value in the aerospace field, such as aircraft brake pads, heat shielding materials for re-entry vehicles, rocket nose cones, engine nozzles, thrust chambers and combustion chamber linings, etc. [0003] According to the type of matrix precursor used in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/83C04B35/622
Inventor 李宇花
Owner 南京白港复合材料有限公司
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