Preparation process of high-performance carbon fiber graphene

Abstract

The invention discloses a preparation process of high-performance carbon fiber graphene. In the preparation process of the high-performance carbon fiber graphene, modified carbon fibers can be used asa support framework to effectively avoid excessive stacking of the modified graphene, so that the modified graphene uniformly coats the surfaces of the modified carbon fibers and fills gaps among themodified carbon fibers, a continuous and compact interconnection structure is formed, and a complete and efficient conductive path is formed after high-temperature graphitization treatment, so that the high-performance carbon fiber graphene is endowed with excellent conductive performance, and the liquid crystal phase asphalt is easy to graphitize, low in porosity after carbonization treatment, shows fluidity and viscosity after reaching a softening point, and permeates into a gap between the modified graphene and the modified carbon fiber to be used as an adhesive for improving the bonding strength between the modified graphene and the modified carbon fiber after converted into a casting state, and meanwhile, the mechanical property of the obtained high-performance carbon fiber grapheneis improved.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a preparation process of high-performance carbon fiber graphene. Background technique [0002] At present, with the development of thinner, more flexible and highly integrated electronic products, higher requirements are placed on the flexibility of energy storage devices and the heat dissipation performance of electronic devices. Since graphene was discovered in 2004, it has Electrical, thermal, and mechanical properties have aroused great research interest. As a basic material, graphene has been widely used in electrode materials for energy storage devices (such as supercapacitors, batteries, etc.), and heat dissipation equipment with high heat dissipation performance. and other fields. [0003] However, with the development of science and technology, the existing graphene still needs to continue to improve in terms of electrical conductivity and thermal conductivity so as t...

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Problems solved by technology

[0004] In order to overcome the above technical problems, the object of the present invention is to provide a high-performance carbon fiber graphene preparation process: by adding liquid crystal phase pitch powder to toluene, stirring for 1-2h at a speed of 200-300r / min , then add modified carbon fiber and continue to stir for 30-50min to obtain a suspension, place the suspension in a suction filtration device to form a carbon fiber film, and then place the suction filtration device and the carbon fiber film in the suction filtration device at room temperature to naturally Dry for 6-8 hours, then add modified graphene oxide solution to the suction filtration device to continue vacuum filtration, place the product obtained by suction filtration in an oven, and dry it completely at a temperature of 60°C to obtain a composite film , place the composite film between two ceramic sheets, place it in a quartz tube, raise the temperature to 280°C under the protection of argon and keep it for 30-40min, then continue to heat up to 900°C at a heating rate of 4-6°C / min. Keep warm for 2-3h, and finally continue to heat up to 2300°C at a heating rate of 6-8°C / min and keep warm for 2-3h to obtain this high-performance carbon fiber graphene, which solves the problem of insufficient electrical and thermal conductivity of existing graphene high problem