A high-performance carbon fiber graphene preparation process

Abstract

The invention discloses a high-performance carbon fiber graphene preparation process. In the high-performance carbon fiber graphene preparation process, the modified carbon fiber can be used as a supporting framework to effectively avoid excessive stacking of the modified graphene, so that the modified graphene is evenly coated The surface of the modified carbon fiber fills the gaps between the modified carbon fibers to form a continuous and close interconnected structure. After high-temperature graphitization treatment, a complete and efficient conductive path is formed, which endows the high-performance carbon fiber graphene with excellent electrical conductivity. performance, and the liquid crystal phase pitch is a kind of easy graphitization, the porosity is low after carbonization treatment, it shows fluidity and viscosity after reaching the softening point, and penetrates into the modified graphene and modified carbon fiber after being transformed into a cast state. As a binder, the bond strength between modified graphene and modified carbon fiber is improved, and the mechanical properties of the obtained high-performance carbon fiber graphene are 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...

AI Technical Summary

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