▎ 摘　　要

NOVELTY - Preparing graphene oxide grafted carbon fiber reinforced body comprises (i) treating the carbon fiber with acid to obtain acidified carbon fiber, (ii) mixing the acidified carbon fiber with polyamide-amine in methanol solution to obtain mixed solution, drying under vacuum to obtain the polyamide-amine of carbon fiber, (iii) adding the graphene oxide to the acetone solution, and (iv) adding the daiamide-amine modified carbon fiber into the graphene oxide acetone suspension to obtain mixed solution, and controlling the graphite oxide and polyamide-amine modified carbon fiber ratio to 1:1.5-9. USE - The method is useful for preparing graphene oxide grafted carbon fiber reinforced body. ADVANTAGE - The method: is carried out under mild reaction conditions, safe, suitable for industrial production, economical, and simple; shortens the reaction time; and produces carbon fiber reinforced body and epoxy resin with a improved shear strength of 79.77-105.50 MPa. DETAILED DESCRIPTION - Preparing graphene oxide grafted carbon fiber reinforced body comprises (i) treating the carbon fiber with acid to obtain acidified carbon fiber, (ii) mixing the acidified carbon fiber with 1% polyamide-amine in methanol solution to obtain mixed solution, and reacting to 20-50 degrees C for 4-12 hours, removing the acidified carbon fiber by washing with methanol for 2-5 times and water for 2-5 times, drying to constant weight at 40-60 degrees C under vacuum to obtain the polyamide-amine of carbon fiber, where the ratio of acidification of carbon fiber and polyamide-amine is 0.1-4:1, (iii) adding the graphene oxide to the acetone solution, performing ultrasonic treatment for 20-60 minutes, where the concentration of graphene oxide is 0.01 g/l acetone suspension, and (iv) adding the prepared daiamide-amine modified carbon fiber into the graphene oxide acetone suspension to obtain mixed solution, reacting the mixture solution to 60-100 degrees C for 6-12 hours, filtering, and washing the filtrate to obtain the precipitate with acetone and de-ionized water for 3-6 times, then washing the precipitate to a constant weight at 40-60 degrees C in vacuum to obtain the graphene oxide grafted carbon fiber reinforced body, and controlling the graphite oxide and polyamide-amine modified carbon fiber ratio to 1:1.5-9.