▎ 摘　　要

NOVELTY - Modifying carbon fiber surface complex comprises soaking carbon fiber in polyphenol-dissolved buffer solution at pH 7-10, stirring for 12-48 hours, repeatedly washing with deionized water for 2-10 minutes to obtain the product one, adding the graphene oxide into polyphenol-dissolved buffer solution at pH 7- 10, stirring for 12-48 hours, taking the supernatant to obtain product two, soaking the product one in the solution containing the transition metal ion for 30-60 minutes, soaking in the solution two for 30-60 minutes, washing and drying to obtain the modified carbon fiber USE - The method is useful for modifying carbon fiber surface complex. ADVANTAGE - The modified carbon fiber has good surface wettability and bonding and has high interface strength with the resin matrix. The method utilizes green and environmentally friendly raw materials; has mild reaction conditions; is simple and has short aging time.