▎ 摘　　要

NOVELTY - Modified graphene comprises 15-45 pts. wt. flake graphene, 2-6 pts. wt. spherical high thermal conductive carbon black, 2-6 pts. wt. flake boron nitride, 2-6 pts. wt. spherical boron nitride, 0.2-0.5 pt. wt. graphene dispersant and 5-10 pts. wt. flaky clay. USE - The modified graphene is useful for preparing an aqueous graphene heat-dissipating paint. ADVANTAGE - The modified graphene has excellent network structure, is environmentally-friendly and provides paint having heat-dissipating function. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a method for preparing a modified graphene involving (a) adding the clay slowly to deionized water, uniformly dispersing under stirring and adding a modifier, (b) slowly adding flake graphene and flake boron nitride to the suspension liquid of the clay, adding melamine and hydrochloric acid, stirring rapidly and adding the suspension to a grinding vessel for dispersion grinding to obtain a uniform dispersion and (c) adding the spherical high thermal conductivity carbon black and the spherical boron nitride slowly to the grinding vessel for co-grinding to obtain the product; (2) an aqueous graphene heat-dissipating paint comprises 26.2-73.5 pts. wt. modified graphene, 10-25 pts. wt. binder and 0.2-0.5 pt. wt. antifoaming agent; and (3) a method for preparing the aqueous graphene heat-dissipating paint involving adding the binder to the modified graphene, stirring, adding the antifoaming agent and dispersing uniformly the mixture under stirring uniformly to obtain the product.