▎ 摘　　要

NOVELTY - Performing electrophoresis deposition of graphene oxide modified carbon fiber involves subjecting desizing treatment of carbon fiber surface, and putting into 30% hydrogen peroxide and placing in water bath relux at 80-90 degrees C for 1-3 hours, and then subjected to filtration. The obtained surface is cleaned with deionized water and put into 50-70% concentrated nitric acid, and placed in water bath relux at 60-80 degrees C for 1-3 hours, and filtered and cleaned with deionized water, and subjected to drying treatment and acidification to obtain pre-treated carbon fiber. USE - Method for performing electrophoresis deposition of graphene oxide modified carbon fiber (claimed). ADVANTAGE - The method enables to perform electrophoresis deposition of graphene oxide modified carbon fiber, which forms a high-performance composite materials, improves mechanical propertie, conductivity and heat resistance of carbon fiber, cost-effective, simple operation, strong applicability, good effect, eco-friendly, and is suitable for industrial production. DETAILED DESCRIPTION - Performing electrophoresis deposition of graphene oxide modified carbon fiber involves subjecting desizing treatment of carbon fiber surface, and putting into 30% hydrogen peroxide and placing in water bath relux at 80-90 degrees C for 1-3 hours, and then subjected to filtration. The obtained surface is cleaned with deionized water and put into 50-70% concentrated nitric acid, and placed in water bath relux at 60-80 degrees C for 1-3 hours, and filtered and cleaned with deionized water, and subjected to drying treatment and acidification to obtain pre-treated carbon fiber. The graphene oxide is added with deionized water and subjected to ultrasonic processing for 10-50 minutes to obtain 0.02-1g/L aqueous graphene oxide solution. The obtained aqueous graphene oxide solution is utilized as electrophoresis deposition liquid and carbon fiber is connected with positive power pole and placed in electrophoresis depositing pool to carry out electrophoresis deposition, and when output voltage of direct current power is 5-25V then processed carbon fiber is dried to complete electrophoresis deposition. An INDEPENDENT CLAIM is included for a method for preparing graphene oxide, which involves: (A) mixing graphite powder, sodium nitrate and concentrated sulfuric acid with potassium permanganatee and placing in ice water bath at 2 degrees C for 1 hour to obtain mixture A, where mass and volume ratio of concentrated sulfuric acid and sodium nitrate is 40ml:1g, and mass ratio of graphite powder and sodium nitrate is 2:1, and mass ratio of potassium permanganate and sodium nitrate is 6:1; (B) transferring mixture A to water bath at 35 degrees C for 30 minutes, and adding 3 times of deionized water into it and reacting at 98 degrees C for 15 minutes to obtain mixture B; (C) diluting obtained mixture B by adding water, and subjecting to solution treatment by adding 30wt.% hydrogen peroxide, and subjecting to suction filtration, and washing with deionized water to obtain precipitate; (D) subjecting vacuum drying of obtained precipitate at 40-60 degrees c for 6 hours to obtain graphene oxide; and (E) adding obtained graphene oxide in water to obtain suspension, and subjecting to ultrasonic treatment for 60-100 minutes to obtain graphene oxide alkene solution, and subjecting obtained solution to vacuum drying at 40-60 degrees C for 5 hours to obtain final product.