▎ 摘　　要

NOVELTY - Preparing graphene copper-based composite material comprises (i) taking copper powder with a particle size of 0.1-80 mu m and adding into a hydrazine hydrate solution with concentration of 4-30 g/l for etching; (iii) filtering and drying the copper powder etched by step (i) at 45-65 degrees C, and laying in a square quartz boat, where the thickness is 0.1-1 mm; (iv) adding the quartz boat prepared in step (ii) into the tube of the chemical vapor deposition furnace and adding the thermal plug to seal the chemical vapor deposition furnace, and closing the heating furnace; (iv) adjusting the procedure of the chemical vapor deposition furnace in step (iii), passing ethane and adjusting the flow rate to 10-35 sccm, adjusting the flow rate to 50-100 sccm using argon gas, introducing hydrogen gas to adjust the flow rate to 5-15 sccm, evacuating the system and maintaining to 25-50 Pa, increasing the temperature from 15-45 degrees C/minute from room temperature to 1000-1150?Oc and keeping warm for 40 minutes. USE - The method is useful for preparing graphene copper-based composite material. ADVANTAGE - The material has excellent bonding force between the copper matrix and graphene, characteristics of completeness, few defects and excellent quality, excellent tensile strength, deformation rate and electrical conductivity. DETAILED DESCRIPTION - Preparing graphene copper-based composite material comprises (i) taking copper powder with a particle size of 0.1-80 mu m and adding into a hydrazine hydrate solution with concentration of 4-30 g/l for etching; (iii) filtering and drying the copper powder etched by step (i) at 45-65 degrees C, and laying in a square quartz boat, where the thickness is 0.1-1 mm; (iv) adding the quartz boat prepared in step (ii) into the tube of the chemical vapor deposition furnace and adding the thermal plug to seal the chemical vapor deposition furnace, and closing the heating furnace; (iv) adjusting the procedure of the chemical vapor deposition furnace in step (iii), passing ethane and adjusting the flow rate to 10-35 sccm, adjusting the flow rate to 50-100 sccm using argon gas, introducing hydrogen gas to adjust the flow rate to 5-15 sccm, evacuating the system and maintaining to 25-50 Pa, increasing the temperature from 15-45 degrees C/minute from room temperature to 1000-1150?Oc and keeping warm for 40 minutes, passing ethane to adjust the air pressure to 250-350 Pa to maintain 8-15 minutes, turning off the ethane and allowing in argon gas and vacuuming to 30-50 Pa and turning off the heating and turning on the heating furnace when the furnace cools to 350-450 degrees C, taking out the furnace tube and quartz boat to obtain graphene copper matrix composite powder; and (v) adding the graphene copper-based composite material powder into absolute ethanol for ultrasonic cleaning, filtering and drying.