▎ 摘　　要

NOVELTY - MXene/graphene composite thermally conductive fluid, comprises 0.01-1 wt.% MXene/graphene, 0.01-1 wt.% dispersant, and 98-99.8 wt.% water, where the mass ratio of MXene and graphene is 0.1:1-1:1. USE - The MXene/graphene composite heat transfer fluid is used as a heat transfer medium in a condenser tube in temperature control and crack prevention of mass concrete (claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the MXene/graphene composite thermal conductive fluid, comprising (i) adding MXene, graphene and dispersant into water, and stirring evenly; and (ii) ultrasonically dispersing the mixed raw materials.