▎ 摘　　要

NOVELTY - Modified nano graphene brake sheet comprises e.g. mixing rosin, copper fiber and bamboo charcoal fiber, and stirring, and granulating, mixing with remaining raw materials and feeding material, pulverizing, and sieving, feeding pulverized powder into die device to obtain semi-finished brake sheet, adding semi-finished brake sheet into heating device heating molding, and cooling, evacuating, introducing nitrogen gas atmosphere, then pouring argon into closed container, mixing brake sheets with acetic acid, tartaric acid, and washing with deionized water, and then drying to obtain final product. USE - The method is useful for preparing modified nano graphene brake sheet (claimed). ADVANTAGE - The method has strong anti-aging ability and excellent impact resistance, low hot-swelling and cold-shrinking rate. DETAILED DESCRIPTION - Modified nano graphene brake sheet comprises (i) preparing 40-46 pts. wt. silicone rubber, 20-24 pts. wt. polyethylene resin, 8-15 pts. wt. rosin, 3-5 pts. wt. indium trioxide, 3-5 pts. wt. copper fiber, 1-2 pts. wt. bamboo charcoal fiber, 10-16 pts. wt. zirconium dioxide powder, 4-5 pts. wt. montmorillonite powder, 4-5 pts. wt. tourmaline powder, 6-9 pts. wt. tungsten powder, 6-9 pts. wt. pearlite iron powder and 16-20 pts. wt. modified nano graphene, (ii) mixing rosin, copper fiber, bamboo charcoal fiber, and stirring for 10 minutes in a stirrer at 1200-1500 revolutions per minute, then treating at a high pressure of 2-3 MPa for 3 minutes, and granulating into 1-2 mm particles, (iii) mixing material obtained in step (ii) with remaining raw materials in step (i) and feeding material into grinder, pulverizing, and sieving into 50 mesh or less, (iv) feeding pulverized powder into die device to obtain semi-finished brake sheet, (v) adding semi-finished brake sheet into heating device heating molding, and then cooling to room temperature, (vi) placing molded brake sheet in a closed container, evacuating the closed container for 30 minutes, introducing nitrogen gas atmosphere into closed vessel, and maintaining pressure in vessel at 3.5-4.5 MPa and holding for 10 minutes, (vii) removing brake sheets, heating brake sheet at 60-70 degrees C, placing brake sheets in a closed container while hot, and then pouring argon into closed container to maintain the pressure in container at 3.5-4.5 MPa and holding for 10 minutes, and (viii) removing the brake sheets, mixing brake sheets with acetic acid, tartaric acid in a molar ration of 1:1, soaking for 15 minutes, and then washing with deionized water, and then drying to obtain final product.