▎ 摘　　要

NOVELTY - Graphite polymer is dissolved in solution (e), stirred with stirring speed of 300-1000 rpm for 10-60 minutes, to obtain graphene oxide/polymer coating solution. Carbon fiber graphite/polymer is added in coating solution, impregnated for 0.5-1.5 hours, and then dried at 500-150 degrees C for 1-24 hours, to obtain coated carbon fiber. The coated carbon fiber is added to mold, then vacuumized until vacuum degree is -0.5 MPa to -1.5 MPa, mixed with base resin, carbonized for 10-36 hours, to obtain interface modified carbon/carbon composite material. USE - Interface modification of carbon/carbon composite material (claimed). ADVANTAGE - The method efficiently and economically provides interface-modified carbon/carbon composite material having high mechanical properties. DETAILED DESCRIPTION - Strong oxidizing acid and nitrate are mixed with graphite, and reduced at -5 degrees C to 0 degrees C, stirred with speed of 100-300 rpm, dripped with speed of 80-120 mg/minute after adding potassium-containing strong oxidant and solution (a), and then temperature is increased to 10-30 degrees C and stirred with speed of 300-500 rpm for 5-10 hours, to obtain reaction mixed solution. The temperature of the reaction solution is increased to 10-50 degrees C under water bath conditions, continuously reacted for 40 minutes to 2 hours. Then, 90-1000 degrees C heat-treatment reaction solvent is added, continuously boiled for 20 minutes to 5 hours and 55% hydrogen peroxide aqueous solution is added, stirred and mixed uniformly. The mixture is allowed to standstill for 0.5-1 hour, washed using super-pure water, centrifuged, filtered, dried at 35-50 degrees C for 3-24 hours, to obtain graphite oxide powder. The graphite oxide powder is added into solvent, stirred and mixing uniformly, to obtain oxidized graphite solution, which is then ultrasonically treated, to obtain graphene oxide solution. The obtained solution is centrifuged with rotating speed of 3000-10000, supernatant is removed at -35 degrees C to 50 degrees C and dried for 3-24 hours, to obtain oxidized graphite alkene powder. Graphene oxide powder is dissolved into solvent, ultrasonically-treated for 10-60 minutes under ultrasonic power of 300-500 W and then hydrazine hydrate is added and ultrasonically-treated for 20-40 minutes under ultrasonic power of 300-500 Weight% filtered, filter solid is washed using deionized water for 5-10 times, and dried, to obtain graphene. Graphite polymer is dissolved in solution (e), stirred with stirring speed of 300-1000 rpm for 10-60 minutes, to obtain graphene oxide/polymer coating solution. Carbon fiber graphite/polymer is added in coating solution, impregnated for 0.5-1.5 hours, and then dried at 500-150 degrees C for 1-24 hours, to obtain coated carbon fiber. The coated carbon fiber is added to mold, then vacuumized until vacuum degree is -0.5 MPa to -1.5 MPa, mixed with base resin, carbonized for 10-36 hours, to obtain interface modified carbon/carbon composite material. The mass ratio of strong oxidizing acid and nitrate is 2-40:1. The mass ratio of water and nitrate is 1-41:1. The mass ratio of potassium-containing strong oxidant and nitrate is 0.1:1. The mass ratio of hydrogen peroxide aqueous solution and nitrate is 10-40:1. The mass ratio of oxidized graphite alkene powder and solvent is 100:0.01-0.5. The mass ratio of hydrazine hydrate and solvent is 1:2-1000. The mass ratio of graphite and base resin is 1:1-100. The mass ratio of graphite and polymer is 1:1-1000.