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Preparation method of high-strength light carbon fiber composite material

A technology of carbon composite materials and composite materials, applied in the field of preparation of carbon materials, to achieve high thermal conductivity, strong operability, and convenient production

Active Publication Date: 2015-05-27
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) Coating sizing agent on the surface of continuous filament carbon fiber, and then pyrolyzing at 800 °C under nitrogen protection to remove the oxygen-containing functional groups on the surface of carbon fiber, exposing the naked surface of carbon fiber, and then heat the pretreated continuous filament carbon fiber. A preformed body of a highly oriented conical carbon fiber composite material is wound by winding, and the preformed body of the carbon fiber is used as a reinforcing skeleton; wherein, the volume density of the preformed body of the carbon fiber is 0.5 g / cm 3 The sizing agent is made up 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 embryo 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 microns, mix the raw ma...

Embodiment 2

[0024] (1) Coating sizing agent on the surface of continuous filament carbon fiber, and then pyrolyzing at 1200 °C under nitrogen protection to remove oxygen-containing functional groups on the surface of carbon fiber, exposing the naked surface of carbon fiber, and then pretreated continuous filament carbon fiber A preformed body of a highly oriented conical carbon fiber composite material is made by winding, and the preformed body of the carbon fiber is used as a reinforcing skeleton; wherein, the volume density of the preformed body of the carbon fiber is 0.4g / cm2 3 ; Described sizing agent is made up of the polyphenylquinoxaline PPQ of 13 parts by weight, 28 parts of boron-modified phenolic resin and 63 parts of epoxy resin emulsion;

[0025] According to the mass ratio of preformed embryo 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 microns, mix the raw mate...

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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 preparation method of a carbon material, in particular to a preparation method of 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 the focus of research and development in the world's high-tech fields. It has important application value in the aerospace field, such as for aircraft brake pads, heat shielding materials for re-entry vehicles, rocket nose cones, engine nozzles, thrust chambers and combustion chamber linings. [0003] According to the type of matrix pre...

Claims

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Application Information

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Patent Type & Authority Applications(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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