A fiber-reinforced composite material with surface self-healing function

Abstract

The invention discloses a fiber-reinforced composite material with surface self-repairing function, which includes a fiber braided matrix. During the preparation process of the fiber braided matrix, several main pipelines are pre-embedded. After the fiber braided body is prepared, according to the position of the main pipeline , drill holes from the surface of the fiber braided matrix until it communicates with the main pipeline, and the channel obtained is the secondary pipeline; first coat a layer of primer on the surface of the fiber braided matrix, and then lay micro-nano Structural film, lay a layer of plastic protective film on the micro-nano structure film, the micro-nano structure film and the plastic film together form the diversion layer, and then prepare a top coat on the fiber braided substrate, the primer and the top coat together form the coating . The composite material in the present invention has a three-level repair pipeline, that is, a main pipeline, a secondary pipeline and a micro-nano structure membrane. When the surface is damaged, no external stimulus is required, and the damaged part can be repaired by pumping a repair agent. And it can be repaired multiple times.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a fiber-reinforced composite material with surface self-repairing function. Background technique [0002] When the surface of the fiber-reinforced composite material is damaged by scratches, abrasions, cracks, etc., the fibers of the fiber-reinforced composite material will be exposed, and the exposed fibers will age and break under the influence of sun and rain erosion or other unfavorable factors. As a result, composite components fail and accidents occur. At present, the main fiber-reinforced repair is to manually detect the surface damage and repair it manually, and there are also some cutting-edge researches on self-repair. Self-healing includes intrinsic self-healing and external aid self-healing. Intrinsic self-healing: using self-healing coatings to stimulate repair behavior under certain conditions; external aid self-healing: surface damage trigg...

AI Technical Summary

Problems solved by technology

However, in the existing cutting-edge research, intrinsic self-healing coatings require certain external stimulation conditions such as light, heat, and magnetism, and the conditions are complex. Existing external self-healing schemes, such as capsule self-healing and preset pulse Tube self-healing, due to the limited capacity of the repairing agent, multiple self-healing cannot be achieved

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