▎ 摘　　要

NOVELTY - Preparing double-component heat-conducting silicone rubber using graphene and multi-wall carbon nanotubes as mixed fillers comprises e.g. (1) mixing graphite powder, POSS and an organic solvent A, sealing, carrying out ultrasonic treatment and obtain a graphene dispersion liquid C containing excessive POSS pyrenyl hyperbranched polyethylene, (2) carrying out high-speed centrifugation or vacuum filtration on the graphene dispersion liquid C to remove excessive POSS pyrenyl hyperbranched polyethylene, and carrying out ultrasonic treatment to obtain the graphene organic dispersion liquid, (3) mixing carbon nanotube powder, POSS pyrenyl hyperbranched polyethylene and an organic solvent A, sealing, performing ultrasonic treatment to obtain a carbon nanotube initial dispersion liquid D, and further performing low-speed centrifugation and allowing to stand treatment to obtain a carbon nanotube dispersion liquid E containing excessive POSS pyrenyl hyperbranched polyethylene. USE - The method is useful for preparing double-component heat-conducting silicone rubber using graphene and multi-wall carbon nanotubes as mixed fillers. ADVANTAGE - The method: is simple and easy to amplify; and the obtained product has excellent heat conducting property, high dispersion degree of graphene and carbon nano-tube. DETAILED DESCRIPTION - Preparing double-component heat-conducting silicone rubber using graphene and multi-wall carbon nanotubes as mixed fillers comprises (1) mixing graphite powder, POSS (polyhedral oligomeric silsesquioxane) pyrenyl hyperbranched polyethylene and an organic solvent A, sealing, carrying out ultrasonic treatment on the obtained mixture to obtain a graphene initial dispersion liquid B, and further carrying out low-speed centrifugation and allowing to stand treatment to obtain a graphene dispersion liquid C containing excessive POSS pyrenyl hyperbranched polyethylene, (2) carrying out high-speed centrifugation or vacuum filtration on the graphene dispersion liquid C obtained in the resultant step to remove excessive POSS pyrenyl hyperbranched polyethylene, and carrying out ultrasonic treatment again to disperse the excessive POSS pyrenyl hyperbranched polyethylene in the organic solvent A to obtain the graphene organic dispersion liquid, (3) mixing carbon nanotube powder, POSS pyrenyl hyperbranched polyethylene and an organic solvent A, sealing, performing ultrasonic treatment on the obtained mixture to obtain a carbon nanotube initial dispersion liquid D, and further performing low-speed centrifugation and allowing to stand treatment to obtain a carbon nanotube dispersion liquid E containing excessive POSS pyrenyl hyperbranched polyethylene, (4) carrying out high-speed centrifugation or vacuum filtration on the carbon nanotube dispersion liquid E obtained in the resultant step to remove the contained excessive POSS-based pyrenyl hyperbranched polyethylene, and carrying out ultrasonic treatment again to disperse the excessive POSS-based pyrenyl hyperbranched polyethylene into the organic solvent A to obtain the carbon nanotube organic dispersion liquid, (5) mixing graphene organic dispersion liquid or carbon nano tube organic dispersion liquid according to a specific proportion at room temperature, adding polymer matrix polydimethylsiloxane Sylgard 184 A component into graphene organic dispersion liquid and stirring the mixture uniformly, and placing into an oven to dry a solvent, (6) adding polymer matrix polydimethylsiloxane Sylgard 184B component into resultant dried mixture, placing the mixture into an ice water bath for stirring, then pouring the mixed composite material into a customized polytetrafluoroethylene (PTFE ) mold, placing the molded PTFE mold into a vacuum oven for curing and forming the final product.