Carbon fiber resin-based composite material and preparation method thereof

Abstract

The invention relates to the field of material preparation, and in particular, relates to a carbon fiber resin-based composite material and a preparation method thereof. The composite material takes a carbon fiber-perfluoroalkyl vinyl ether polymer bead string as a carbon fiber reinforcement body and a mixture of a silane coupling agent and epoxy resin as a resin matrix. The carbon fiber-perfluoroalkyl vinyl ether polymer bead string is prepared by the following method: spraying a certain amount of perfluoroalkyl vinyl ether polymer on a specified position of continuous carbon fiber, and fully infiltrating the perfluoroalkyl vinyl ether polymer with the carbon fiber to form a sphere of which the inside is fully infiltrated and mixed with the carbon fiber and the outside is completely wrapped with the carbon fiber, and curing to obtain the carbon fiber-perfluoroalkyl vinyl ether polymer bead string. According to the method, the thickness of the interface modulus transition layer of the carbon fiber resin-based composite material can be flexibly controlled, the interface performance is effectively improved, meanwhile, the bonding strength of the carbon fiber reinforcement body and the resin matrix is improved, and thus the mechanical performance of the carbon fiber resin-based composite material is improved.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a carbon fiber resin-based composite material and a preparation method thereof. Background technique [0002] Carbon fiber resin matrix composites are widely used in aerospace, national defense and military, sports and other fields because of their light weight and high strength. As an anisotropic material, carbon fiber reinforced body mainly exhibits excellent mechanical properties in the axial direction, while its mechanical properties in the transverse direction and between layers are significantly lower. It presents a large number of "turbulent graphite" structures, resulting in fewer surface active functional groups, and poor wettability with the resin matrix, so the interface between the carbon fiber reinforcement and the resin matrix is ​​weaker. A large number of studies have shown that the microscopic interface between the fiber reinforcement and the resin matrix i...

AI Technical Summary

Problems solved by technology

As an anisotropic material, carbon fiber reinforced body mainly exhibits excellent mechanical properties in the axial direction, while its mechanical properties in the transverse direction and between layers are significantly lower. It presents a large number of "turbulent graphite" structures, resulting in less active functional groups on the surface, and poor wettability with the resin matrix, so the interface between the carbon fiber reinforcement and the resin matrix is ​​weaker.