High-performance carbon fiber composite material and preparation method thereof

By adding a catalyst to the sizing agent of the carbon fiber composite, the growth of carbon nanotubes is promoted at high temperature, and the problems of structural collapse and mechanical properties of carbon fiber composites are solved at high temperatures, and its high temperature mechanical properties are improved.

CN119287658APending Publication Date: 2025-01-10XIAN KANGBEN MATERIAL
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Patent Information

Application Number
CN202411410743.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-10
Publication Date
2025-01-10

AI Technical Summary

Technical Problem

Carbon fiber composites are prone to structural collapse and mechanical performance losses at high temperatures, which limits their application in high temperature fields such as aerospace.

Method used

By adding iron, cobalt, nickel and magnesium into the sizing agent as catalysts, a carbon nanotube growth catalyst is introduced on the surface of the carbon fiber by a simple sizing method, so that the carbon fiber composite material can form an environment with both carbon source and catalyst at high temperatures. This will promote the growth of carbon nanotubes and avoid the collapse of carbonized structures.

Benefits of technology

It significantly improves the mechanical properties of carbon fiber composites at high temperatures, slows down the collapse of composite structures and loses mechanical properties, and maintains the mechanical strength at high temperatures.

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Abstract

The invention discloses a high-performance carbon fiber composite material and a preparation method thereof.The preparation method comprises the steps that epoxy resin, an emulsifier and a catalyst of a preset amount are selected and mixed, distilled water is added, stirring is conducted, and a uniform emulsion sizing agent is obtained; carrying out sizing treatment on the unsized carbon fibers by utilizing an emulsion sizing agent; immersing the sized carbon fibers into phenolic resin to enable the surfaces of the sized carbon fibers to be completely wrapped with the phenolic resin, and then performing pressurized curing; and carrying out heat treatment on the cured carbon fiber phenolic aldehyde composite material to form a carbon nanotube on the surface of the carbon fiber so as to obtain the final carbon fiber composite material. According to the invention, elements such as iron, cobalt, nickel and magnesium are added into a sizing agent, and a catalyst required by the growth of the carbon nanotubes is introduced on the surface of the carbon fiber in a simple sizing manner, so that the carbon fiber composite material forms an environment with both a carbon source and the catalyst at high temperature, thereby facilitating the growth of the carbon nanotubes on the surface of the carbon fiber composite material.
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