Carbon fiber surface and composite interface

• 1、Nanjing University of Aeronautics and Astronautics materials science and technology

Abstract：Carbon fiber is widely used in the preparation of composite materials due to its excellent mechanical properties and quality advantages. The most important problem in the application of carbon fiber composites is that the surface activity of carbon fiber is weak. Carbon fiber has poor binding performance with polymer matrix, and is unable to provide sufficient interfacial binding force, leading to interlayer failure of carbon fiber composites. An effective method to solve this problem is to modify the surface of the carbon fiber and improve the bonding force between the surface of the carbon fiber and the matrix to improve the interlayer performance of the carbon fiber composite material. This article summarizes the various carbon fiber sCarbon fiber surface and composite interfaceurface modification methods, including the latest system information of "wet", "dry" and "multi-scale" fiber surface modification technologies. It is also introduced that how to maintain the carbon fiber mechanical strength while modifying the surface of carbon fibers and emphasized its importance.

Keywords： Carbon fiber surface modification mechanical strength interlayer bonding