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A carbon/carbon composite material preform and its preparation method

A carbon composite material and preform technology, applied in the field of materials science, can solve the problems of high cost and complicated preparation process, and achieve the effects of low cost, simple equipment and convenient operation.

Inactive Publication Date: 2018-07-06
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above-mentioned problems in the prior art, the present invention provides a method for preparing a carbon / carbon composite material preform, and the method for preparing the carbon / carbon composite material preform should solve the problem of preparing carbon / carbon The technical problems of complex preparation process and high cost of carbon composite material prefabricated body

Method used

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  • A carbon/carbon composite material preform and its preparation method
  • A carbon/carbon composite material preform and its preparation method
  • A carbon/carbon composite material preform and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0039] (1) First prepare the dispersion, the weight ratio of the dispersant polyethylene oxide, methyl hydroxypropyl cellulose ether and distilled water in the dispersion is 1:1:2000, and then add short carbon fibers with a length of 6mm to the dispersion Among them, the weight ratio of the two is 1:400, wherein the weight of the short carbon fiber is 9g, and finally the above-mentioned mixture is stirred in a magnetic stirrer for 8h to evenly disperse the short carbon fiber in the dispersion liquid, and the stirring speed is 800 rpm;

[0040] (2) Pour the above mixture into a container with a certain geometric shape, the geometric shape of the container is determined according to the shape of the prefabricated body, let the short carbon fibers settle for 0.5h, and suck out the supernatant;

[0041] (3) Place the above-mentioned container in a drying oven, and dry it at 110° C. for 10 hours to obtain 8.79 g of a preformed short carbon fiber preform;

[0042] (4) In 200g of n-p...

Embodiment 2

[0046] (1) First prepare the dispersion, the weight ratio of the dispersant polyethylene oxide, methyl hydroxypropyl cellulose ether and distilled water in the dispersion is 1:1:2000, and then add short carbon fibers with a length of 6mm to the dispersion Among them, the weight ratio of the two is 0.5:400, wherein the weight of the short carbon fiber is 4.5g, and finally the above-mentioned mixture is stirred in a magnetic stirrer for 6h to evenly disperse the short carbon fiber in the dispersion liquid, and the stirring speed is 600 rpm;

[0047] (2) Pour the above mixture into a container with a certain geometric shape, the geometric shape of the container is determined according to the shape of the prefabricated body, let the short carbon fibers settle for 0.5h, and suck out the supernatant;

[0048] (3) Place the above-mentioned container in a drying oven, and dry at 110° C. for 10 hours to obtain a preliminary formed short carbon fiber prefabricated body;

[0049] (4) Add...

Embodiment 3

[0053] (1) First prepare the dispersion, the weight ratio of the dispersant polyethylene oxide, methyl hydroxypropyl cellulose ether and distilled water in the dispersion is 1:1:2000, and then add short carbon fibers with a length of 9mm to the dispersion Among them, the weight ratio of the two is 1:400, wherein the weight of the short carbon fiber is 9g, and finally the above-mentioned mixture is stirred in a magnetic stirrer for 7h to evenly disperse the short carbon fiber in the dispersion liquid, and the stirring speed is 600 rpm;

[0054] (2) Pour the above mixture into a container with a certain geometric shape, the geometric shape of the container is determined according to the shape of the prefabricated body, let the short carbon fibers settle for 0.5h, and suck out the supernatant;

[0055] (3) Place the above-mentioned container in a drying oven, and dry at 110° C. for 10 hours to obtain a preliminary formed short carbon fiber prefabricated body;

[0056] (4) Add m-c...

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Abstract

The invention relates to a carbon / carbon composite material preform. The carbon / carbon composite material preform comprises 40-70wt% of short carbon fibers, and the balance of a carbon nano-adhesive. The invention provides a preparation method of the preform. The method comprises the following steps: dispersing the short carbon fibers in a polyoxyethylene and hydroxypropyl methyl cellulose ether dispersed aqueous solution; standing the obtained solution, and removing a supernatant; heating and drying the obtained material to obtain a carbon fiber preform; carrying out vacuum impregnation to make a n-propanol solution of phenol-metacresol-furfural-acetyl chloride be impregnated into the carbon fiber preform, heating the obtained carbon fiber preform to carry out in situ polymerization in order to form a phenolic aldehyde-based nano-adhesive, and drying the phenolic aldehyde-based nano-adhesive to volatilize n-propanol in order to obtain a phenolic resin nano-adhesive reinforced carbon fiber preform; and carbonizing the phenolic resin nano-adhesive reinforced carbon fiber preform to obtain the carbon nano-adhesive reinforced short carbon fiber preform. The preparation method has the advantages of no need of expensive long carbon fibers, no need of a complex knitting technology, convenient operation, short period, low cost, excellent performances and easy industrial production.

Description

technical field [0001] The invention belongs to the field of materials science, and relates to a carbon material, in particular to a carbon / carbon composite material preform and a preparation method thereof. Background technique [0002] The first appearance of carbon / carbon composites was obtained by chance in 1958 at the Chance Voguht Aeronautical Laboratory. Because this material has a series of advantages such as light weight, high modulus, high specific strength, good mechanical properties, heat resistance, corrosion resistance, friction and vibration reduction characteristics, and thermal and electrical conductivity characteristics, it is widely used in aviation, aerospace, nuclear energy, etc. , medicine and civil and other fields, has a good application prospect. [0003] As the premise and basis for the preparation of carbon / carbon composite materials, the preform will not only affect the densification speed and process of the material, but also affect various prop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/626C04B35/83
CPCC04B35/6267C04B35/83C04B2235/48
Inventor 张睿孟婷婷金双玲金鸣林邵霞张晓康穆艳菡王孝龙岳齐
Owner SHANGHAI INST OF TECH
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