Method for recovering and preparing carbon/carbon preform from carbon fiber reinforced resin matrix composite material

A technology for reinforcing resin matrix and composite materials, which is applied in the field of recycling and reuse of fiber-reinforced resin matrix composite materials, can solve the problems of insufficient recovery and reuse of resin matrix, damage, and failure of carbon fiber to obtain high-value reuse. , to achieve the effect of low equipment investment and process treatment cost and simple process operation

Active Publication Date: 2018-10-12
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] From the introduction of the above background technology, it can be seen that the current recycling and reuse of carbon fiber reinforced resin matrix composites mainly has the following three aspects: first, the resin matrix of carbo

Method used

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  • Method for recovering and preparing carbon/carbon preform from carbon fiber reinforced resin matrix composite material
  • Method for recovering and preparing carbon/carbon preform from carbon fiber reinforced resin matrix composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] A carbon fiber reinforced resin matrix composite material of the present invention recycles and prepares the method for carbon / carbon preform, such as figure 1 shown, including the following steps:

[0060] (1) Weigh 10.984g of carbon fiber reinforced epoxy resin composite material block, place it in the pyrolysis furnace, close the furnace door, and feed argon gas after vacuuming, so that the pumping and inflation are repeated three times, and the air in the furnace is Completely exhaust to form an inert atmosphere environment, and continue to flow argon. Heat the carbon fiber reinforced epoxy resin composite material in the pyrolysis furnace to perform pre-pyrolysis. The pre-pyrolysis temperature is 350 ° C. After 5 minutes of constant temperature, stop heating to obtain the pre-pyrolysis product, which is lowered to room temperature with the furnace. At this time, the carbon fiber reinforced The epoxy resin composite material was pyrolyzed to produce holes, the weig...

Embodiment 2

[0065] A method for preparing a carbon / carbon preform by reclaiming a carbon fiber reinforced resin-based composite material of the present invention, the preparation process is basically the same as that of Example 1, the only difference being:

[0066]In step (1), take by weighing 10.484g of carbon fiber reinforced epoxy resin composite block, after pre-pyrolysis, the weight of the carbon fiber reinforced epoxy resin composite material with holes is 8.685g, and the epoxy resin matrix weight remains The rate is 69.62%.

[0067] In step (2), the carbon fiber reinforced pre-pyrolysis epoxy resin composite material with holes is placed in the carburant hexaphenoxycyclotriphosphazene melt (150 ° C), fully impregnated and step (3) After pyrolysis, the weight of the obtained carbon / carbon preform was 7.631 g, and the residual carbon rate of the epoxy resin matrix was 51.83%.

[0068] In this example, the surface of the recovered carbon / carbon preform is rich in deposited carbon, a...

Embodiment 3

[0070] A method for preparing a carbon / carbon preform by reclaiming a carbon fiber reinforced resin-based composite material of the present invention, the preparation process is basically the same as that of Example 1, the only difference being:

[0071] In step (1), take by weighing 11.171g of carbon fiber reinforced epoxy resin composite block, after pre-pyrolysis, the weight of the carbon fiber reinforced pre-pyrolysis epoxy resin composite material with holes is 8.804g, epoxy resin The matrix weight retention rate was 62.49%.

[0072] In step (2), the carbon fiber reinforced epoxy resin composite material with holes is placed in the carburant 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide melt (150°C ), after fully impregnated and pyrolyzed in step (3), the weight of the obtained carbon / carbon preform is 7.121g, and the residual carbon rate of the epoxy resin matrix is ​​35.82%.

[0073] In this example, the surface of the recovered carbon / carbon preform is rich in de...

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Abstract

The invention discloses a method for recovering and preparing a carbon/carbon preform from a carbon fiber reinforced resin matrix composite material, and the method comprises the following steps: (1)pre-pyrolyzing the carbon fiber reinforced resin matrix composite material under an inert atmosphere to produce holes on the carbon fiber reinforced resin matrix composite material to obtain a pre-pyrolyzed product; (2) fully immersing a carburant melt or a carburant-containing solution in the holes of the pre-pyrolyzed product, taking the pre-pyrolyzed product out and drying; (3) pyrolyzing the dried carburant-containing pre-pyrolyzed product under the inert atmosphere to sufficiently convert a resin matrix into deposited carbon to obtain the carbon/carbon preform. The method not only fully recovers the resin matrix by the carburant, but also converts the resin matrix into the deposited carbon, the recovered carbon fiber is regular, and the mechanical properties of the recovered carbon fiber are not degraded, and the prepared carbon/carbon perform d can be used for preparing high value-added carbon/ carbon composite materials and carbon/ceramic composite materials, and forward development of high-value reuse of the carbon fiber reinforced resin matrix composite material can be realized.

Description

technical field [0001] The invention belongs to the field of recovery and reuse of fiber-reinforced resin-based composite materials, and in particular relates to a method for preparing a carbon / carbon preform by recycling carbon fiber-reinforced resin-based composite materials. Background technique [0002] Carbon fiber-reinforced resin-based composite materials have the characteristics of low density, high specific strength and specific modulus, good fatigue resistance, and good heat resistance. They have been widely used in cutting-edge product fields such as aerospace, advanced automobiles, and nuclear industries. In terms of civilian use, carbon fiber reinforced resin-based composite materials have gradually become indispensable materials in the fields of energy, transportation, chemical industry, and electric power. [0003] Due to the widespread use of carbon fiber reinforced resin-based composite materials, a large number of leftover materials in the production proces...

Claims

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Application Information

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IPC IPC(8): C04B35/83C04B35/80C04B35/622
CPCC04B35/622C04B35/80C04B35/83
Inventor 白书欣叶益聪朱利安唐宇郭文建任俊张孝洪
Owner NAT UNIV OF DEFENSE TECH
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