High-performance carbon fiber reinforced polyamide composite material and preparation method thereof

The invention discloses a high-performance carbon fiber reinforced polyamide composite material, which comprises the following components in percentage by weight: 60-85% of polyamide resin, 3-10% of flexibilizer and 10-30% of surface functionalized carbon fiber. The high-performance carbon fiber reinforced polyamide composite material has the beneficial effects that 1. the surface carboxyl functionalization of carbon fiber is realized, the surface structure of the carbon fiber is not damaged in the whole reaction process, the self mechanical property of the carbon fiber is not influenced, and the compatibility between the carbon fiber and a resin matrix can be improved by introducing the surface carboxyl functional group of the carbon fiber; and 2. the interface unsticking phenomenon caused by thermal expansion, water diffusion and other factors can be effectively prevented, and the carbon fiber reinforced polyamide composite material can be guaranteed to have high mechanical property conservation rate in an environment of high temperature and high humidity.