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

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...

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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 carbon fiber reinforced resin matrix composites has not been fully recycled and reused; second, the carbon fiber is fluffy and messy And there are different degrees of damage; third, the recycled carbon fiber has not been reused with high value

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