▎ 摘　　要

NOVELTY - Conductive graphene grafted polyurethane elastomer is prepared by adding graphene oxide to N,N-dimethyl polyamide solvent, ultrasonically dispersing, heating, adding 3-chloropropyl trimethoxysilane, reacting, centrifuging, washing and drying to prepare chloropropylated graphene, adding it to N,N-dimethyl polyamide solvent, ultrasonically dispersing, adding catalyst and co-catalyst, heating, reacting, centrifuging, washing and drying to prepare graphene azide, adding toluene diisocyanate and polyester diol into the reaction system, heating, reacting, adding 1,4-butanediol and dibutyltin dilaurate, reacting, adding diynyl glycol derivatives, reacting to prepare side chain alkyne-containing polyurethane and adding graphene azide to N,N-dimethyl polyamide solvent, dispersing, adding alkyne-containing polyurethane and accelerator, reacting, washing and drying, pouring the product into a mold and subjecting to pressure curing and high temperature curing processes to prepare the product. USE - As conductive graphene grafted polyurethane elastomer. ADVANTAGE - The elastomer improves interface compatibility between graphene and polyurethane, achieves thermal conductivity and excellent mechanical properties such as the degree of crosslinking and tensile strength of the polyurethane elastomer. DETAILED DESCRIPTION - Conductive graphene grafted polyurethane elastomer is prepared by (i) adding graphene oxide in a nitrogen atmosphere to the N,N-dimethyl polyamide solvent, placing it in an ultrasonic processor, after ultrasonic dispersion is uniform, heating at 100-120 degrees C, adding 3-chloropropyl trimethoxysilane, reacting for 20-30 hours, centrifuging, washing and drying to prepare chloropropylated graphene, (ii) adding chloropropylated graphene to the N,N-dimethyl polyamide solvent in a nitrogen atmosphere, ultrasonically dispersing, adding sodium azide, catalyst and co-catalyst, heating to 90-120 degrees C, reacting for 24-36 hours, centrifuging, washing and drying to prepare graphene azide, (iii) adding toluene diisocyanate and polyester diol into the reaction system in a nitrogen atmosphere, heating at 75-85 degrees C, reacting for 2-3 hours, and reducing the temperature to 40-50 degrees C, adding 1,4-butanediol and dibutyltin dilaurate, reacting for 30-60 minutes, adding acetone to adjust the viscosity of the solution, and then adding diynyl diol derivatives, increasing the temperature to 70-80 degrees C and reacting for 2-4 hours to prepare side chain alkyne-containing polyurethane and (iv) adding graphene azide in the nitrogen atmosphere to the N,N-dimethyl polyamide solvent, ultrasonically dispersing, adding side chain alkyne-containing polyurethane, click reaction catalyst and accelerator, reacting for 10-20 hours, centrifugal washing and drying, pouring the product into a mold and subjecting to pressure curing and high temperature curing processes in a flat vulcanizer to prepare graphene grafted polyurethane elastomer with high thermal conductivity.