In the current research and application of graphene/rubber composite materials,the influence of the lateral size of graphene on the reinforcement effect of rubber was rarely mentioned.In this paper,the different-sized graphene sheets were hybridized by carbon black to achieve uniform dispersion,and the effect of the sheet size of graphene on mechanical properties,compression heat build-up and wear resistance of carbon black-graphene/natural rubber nanocomposites was discussed.The results indicated that the small sheet size graphene was more beneficial to improving the tensile strength and wear resistance of the composite,while the large sheet size graphene was beneficial to improving the tear resistance and reducing the compression heat build-up of the composite by using 1 phr graphene to replace 5 phr carbon black.
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