Wet needling process for preparing carbon/carbon composite material

A carbon composite material and acupuncture technology, applied in the field of wet acupuncture, can solve the problems of long dipping time and many dipping times, and achieve the effects of improving process safety, reducing dipping times and reducing fiber damage

Pending Publication Date: 2022-03-04
富优特(山东)新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the method of preparing carbon / carbon composite materials by acupuncture molding process is mainly the dry acupuncture method, which has the advantages of long impregnation time (1-2 months for each impregnation) and many impregnation times (requires 7-8 impregnations). defect

Method used

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  • Wet needling process for preparing carbon/carbon composite material
  • Wet needling process for preparing carbon/carbon composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Step 1, the chopped carbon fiber mesh tire with a thickness of 1mm (the chopped fiber mesh tire prepared from Toray T700-12K carbon fiber, the mesh tread density is 80g / m 2 ) into the slurry for impregnation to obtain a carbon fiber mesh tire preform, wherein the quality of the carbon fiber mesh tire accounts for 20±3% of the mass of the slurry.

[0046]Step 2, using a graphite flat plate with screen holes as a tooling, laminating the carbon fiber plain weave with the carbon fiber mesh preform obtained in step 1 to obtain a slurry-containing carbon fiber fabric, and the slurry-containing carbon fiber fabric is needled on a needling machine. puncture to obtain a needle-punched fabric containing pulp, heating (drying) to remove the ethanol solvent in the needle-punching fabric containing pulp, the heating temperature is 80 °C (80-90 °C is equivalent to 80 °C), the time is 12h, and then the 500°C (400-600°C is equivalent to 500°C) curing for 32h (24-48h is equivalent to 32...

Embodiment 2

[0051] Step 1, the carbon fiber mesh tire with a thickness of 1mm (the chopped fiber mesh tire prepared from Toray T700-12K carbon fiber, the mesh tread density is 80g / m 2 ) into the slurry and evenly impregnated to obtain a preform containing a carbon fiber mesh tire, and the weight of the carbon fiber mesh tire is 15±3% of the impregnated slurry.

[0052] Step 2, using a graphite flat plate with screen holes as a tooling, laminating the carbon fiber plain weave with the carbon fiber mesh preform obtained in step 1 to obtain a slurry-containing carbon fiber fabric, and the slurry-containing carbon fiber fabric is needled on a needling machine. Needle-punched fabrics containing pulp are obtained by puncturing, and then dried at 85°C (the effect of 80-90°C is equivalent to 85°C) for 12 hours, and cured at 500°C (the effect of 400-600°C is equivalent to 500°C) for 32 hours (the effect of 24-48h is equivalent to that of 500°C). 32h has the same effect), and then carbonized at 900...

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Abstract

The invention discloses a wet needling process for preparing a carbon/carbon composite material, and relates to the technical field of preparation of carbon/carbon composite materials. The process comprises the following steps: dipping a carbon fiber web in slurry to obtain a carbon fiber web preform; laminating the carbon fiber web preform and carbon fiber cloth to obtain a slurry-containing carbon fiber fabric; needling the slurry-containing carbon fiber fabric to obtain a slurry-containing needled fabric; sequentially carrying out heating, curing and carbonization treatment on the slurry-containing needle-punched fabric to obtain a low-density carbon/carbon composite material blank; the low-density carbon/carbon composite material green body is repeatedly subjected to the treatment processes of dipping, heating, curing and carbonizing, and a high-density carbon/carbon composite material green body is obtained; performing high-temperature heat treatment on the high-density carbon/carbon composite material green body to obtain a carbon/carbon composite material; the slurry is an ethanol suspension of asphalt and graphite powder. According to the process method, the preparation period of the carbon/carbon composite material prepared by a needling method is shortened.

Description

technical field [0001] The invention relates to the technical field of carbon / carbon composite material preparation, in particular to a wet acupuncture process for preparing carbon / carbon composite material. Background technique [0002] The needling forming process is to layer two-dimensional materials in the form of lamellae, and then use a barbed needle to perform needle punching in the longitudinal direction of the laminated fibers, so that the fibers in the two-dimensional plane can be pulled to a direction perpendicular to the two-dimensional plane. The two adjacent layers are needled, and finally a large number of longitudinal fibers are connected to form a three-dimensional fabric. Compared with the fiber cloth laying and forming method, this process increases the longitudinal fiber binding and increases the bonding force between layers; compared with the weaving process, the acupuncture process is simpler and the forming speed is faster. [0003] The designability ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/622
CPCC04B35/83C04B35/622C04B2235/5248C04B2235/48C04B2235/77
Inventor 郭逸陈胜绪李开明
Owner 富优特(山东)新材料科技有限公司
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