▎ 摘　　要

NOVELTY - Preparing a graphene/alginate composite material involves carrying out ultrasonic dispersion of graphene The graphene/sodium alginate is mixed with aqueous solution at 40-50 degrees C for drying to evaporate the solvent film to the graphene/alginate composite film. The stabilizer is added to the dispersed graphene oxide aqueous solution at room temperature for ultrasonic dispersion to obtain a stabilizer/graphene oxide aqueous solution. The sodium alginate is dissolved in an aqueous solution to obtain an aqueous sodium alginate solution. USE - Method for preparing a graphene/alginate composite material (claimed). ADVANTAGE - The method enables to prepare a graphene/alginate composite material with good mechanical property, heat-resistant property, flame retardant property and improved conductivity, and suitable for industrial production. DETAILED DESCRIPTION - Preparing a graphene/alginate composite material involves carrying out ultrasonic dispersion of graphene The graphene/sodium alginate is mixed with aqueous solution at 40-50 degrees C for drying to evaporate the solvent film to the graphene/alginate composite film. The stabilizer is added to the dispersed graphene oxide aqueous solution at room temperature for ultrasonic dispersion to obtain a stabilizer/graphene oxide aqueous solution. The sodium alginate is dissolved in an aqueous solution to obtain an aqueous sodium alginate solution. The stabilizer/graphene oxide solution and sodium alginate aqueous solution are mixed and stirred at high speed for 1-3 hours. The reducing agent is added. The reaction temperature of oil bath reaction is 90-100 degrees C and reaction time is 2-4 hours. The graphene/alginate composite film is added into 4% aqueous solution of calcium chloride for crosslinking for 30 minutes. The residual calcium ions are removed with water and placed at room temperature to obtain graphene/alginate composite material.