▎ 摘　　要

NOVELTY - Temperature sensitive controllable graphene-polymer composite material is prepared by (A) preparing pyrene terminal temperature sensitive polymer, and (B) synthesizing the composite material. The step (A) comprises putting polyvinyl alcohol (OEG-A) and polyvinyl alcohol ether acrylate (OEG-A) (6.45 mmol) in methyl cyanide (CH3CN) solution (5-10 mL), and reacting with pyrene terminal RAFT reagent and initiator azobisisobutyronitrile. The step (B) comprises adding graphene and the polymer into water solution, and subjecting mixed solution to ultrasonic treatment. USE - Temperature sensitive controllable graphene-polymer composite material. DETAILED DESCRIPTION - Temperature sensitive controllable graphene-polymer composite material is prepared by (A) preparing pyrene terminal temperature sensitive polymer, and (B) synthesizing the composite material. The step (A) comprises putting polyvinyl alcohol (OEG-A) and polyvinyl alcohol ether acrylate (OEG-A) (6.45 mmol) in methyl cyanide (CH3CN) solution (5-10 mL), adding pyrene terminal RAFT reagent (3.24x 105 mol), adding initiator azobisisobutyronitrile (AIBN, 1.38 mg), infusing nitrogen into system for 30 minutes to remove oxygen, and subjecting system at 70 degrees C to constant-temperature water bath to react for 7 hours; performing molecular weight n-hexane and dichloromethane purification to obtained polymer and determining pyrene terminal group and polymer by 1H nuclear magnetic resonance (NMR), and determining ratio of different copolymer with low critical solution temperature (LCST) through UV absorption; and before polymerization, controlling OEG and DEG as materials to copolymer with low critical solution temperature (LCST) at 31-82 degrees C, and obtaining pyrene terminal temperature sensitive polymer with low critical solution temperature of 22-72 degrees C. The step (B) comprises adding graphene and the polymer into water solution, subjecting mixed solution to ultrasonic treatment for 30 minutes, stirring and reacting for 5 hours, centrifuging at 14000 revolutions/minute for 30 minutes to obtain desired material.