▎ 摘　　要

NOVELTY - Preparing graphene modified polyvinyl chloride composite material comprises e.g. taking 13-20 pts. wt. graphite, adding into 30-40 times weight mixed acid solution, elevating temperature to 50-60 degrees C, ultrasonic for 1-2 hours, filtering, washing the precipitate with 0.7-1 pts. wt. octylisothiazolinone, stirring uniformly at normal temperature and drying to obtain graphene oxide, taking 2-4 pts. wt. aluminum stearate, adding into 6-9 times weight tetrahydrofuran, stirring uniformly, adding graphene oxide, heat preserving at 65-70 degrees C for 2-3 hours, distilling to remove tetrahydrofuran. USE - The method is useful for preparing graphene modified polyvinyl chloride composite material (claimed). ADVANTAGE - The method: enhances dispersion of graphene between the polymer, and improves the stability of the finished product. DETAILED DESCRIPTION - Preparing graphene modified polyvinyl chloride composite material comprises (i) taking 13-20 pts. wt. graphite, adding into 30-40 times weight mixed acid solution, elevating temperature to 50-60 degrees C, ultrasonic for 1-2 hours, filtering, washing the precipitate with 0.7-1 pts. wt. octylisothiazolinone, stirring uniformly at normal temperature and drying to obtain graphene oxide, (ii) taking 2-4 pts. wt. aluminum stearate, adding into 6-9 times weight tetrahydrofuran, stirring uniformly, adding graphene oxide, heat preserving at 65-70 degrees C for 2-3 hours, distilling to remove tetrahydrofuran, mixing with 1-2 pts. wt. stearic acid, stirring at normal temperature to obtain carboxylated graphene, (iii) taking octylphenylcyclotetrasiloxane and ricinoleic acid, adding into mixture 3-4 times weight N-methyl pyrrolidone, stirring uniformly, raising temperature to 50-60 degrees C, adding barium stearate, maintaining temperature in stirring for 10-20 minutes to obtain organosiloxane dispersion, (iv) adding polyvinyl chloride into 1.7-2 times weight dimethyl carbonate, stirring uniformly, feeding into reaction kettle, raising the temperature to 130-140 degrees C, maintaining temperature with stirring for 20-30 minutes, discharging, mixing with the triethanolamine borate, stirring to normal temperature to obtain modified polyvinyl chloride dispersion, (v) taking 1-2 pts. wt. triethylamine, adding into 3-5 times weight anhydrous ethanol, stirring uniformly with modified polyvinyl chloride dispersion, ultrasonic treatment for 10-15 minutes, distilling to remove ethanol to obtain ammoniated organic polyvinyl chloride, (vi) taking obtained carboxylated graphene and ammoniated organic polyvinyl chloride, adding into silicone dispersion, stirring uniformly, feeding to reaction kettle, stirring at 86-90 degrees C for 40-50 minutes, discharging, filtering, washing the precipitate, vacuum drying at 100-105 degrees C for 1-2 hours, and cooling to normal temperature to obtain organic amide fused graphene cross-linked polyvinyl chloride, and (vii) taking organic amide fused graphene cross-linked polyvinyl chloride, 120-130 pts. wt. polyvinyl chloride and 2-3 pts. wt. melamine, mixing, feeding into extruder, fusing and extruding, and cooling to obtain graphene modified polyvinyl chloride composite material.