▎ 摘　　要

NOVELTY - Preparation of graphene composite microchip involves taking 90-100 pts. wt. biomass material and 0.2-0.8 pt. wt. catalyst, carbonizing at 900-1300 degrees C, adding carbonized material and intercalation agent into high-speed mixer for intercalation modification, weakening the Van der Waals force between materials, modifying for 30-90 minutes where high-speed mixing mixer speed is 500-800 revolutions/minute, filtering and drying to obtain modified materials. USE - Method for preparing graphene composite microchips used for conductive coating (claimed). ADVANTAGE - The method is simple and has reduced production cost. DETAILED DESCRIPTION - Preparation of graphene composite microchip comprises: (A) taking 90-100 pts. wt. biomass material and 0.2-0.8 pt. wt. catalyst and carbonizing at 900-1300 degrees C; (B) adding carbonized material and intercalation agent into high-speed mixer for intercalation modification, weakening the Van der Waals force between materials, modifying for 30-90 minutes where high-speed mixing mixer speed is 500-800 revolutions/minute, filtering and drying to obtain modified materials; (C) adding modified material, 0.5-1.0 pt. wt. dispersing agent and 5-10 pts. wt. high-carbon binder into a disc-type screw extruder and using shear elements of disc-type screw extruder with relative motion dynamic disk to make material fully shear off under the action of mechanical force to obtain graphene composite microfilm coarse material; and (D) carbonizing graphene composite microfilm coarse material at 500 degrees C for 10-20 minutes, adding sodium borohydride solution, stirring, reacting, washing and vacuum drying.