▎ 摘　　要

NOVELTY - A preparation method of MXene-based high thermal conductivity fireproof composite film comprises mixing MXene with a positively charged polymer, ultrasonically processing to obtain a modified MXene solution, pouring a two-dimensional nano material and glutaraldehyde solution to the modified MXene solution, stirring and ultrasonically processing to obtain a mixed solution and vacuum filtering the mixed solution to obtain the MXene-based composite film. USE - The method is used for preparing MXene-based high thermal conductivity fireproof composite film. The MXene-based high thermal conductivity fireproof composite film is used in electronic equipment (all claimed). ADVANTAGE - The composite film has improved thermal conductivity and flame retardant properties and reduced thermal resistance because of the intercalation structure formed by MXene and nano black phosphorus thermal conductive filler which forms thermal conduction path synergistically. The preparation method is simple and the reaction temperature is moderate. The thermal conductive filler fully intercalates to make up for the defects of the matrix and reduces the thermal resistance of the thermal surface and the maximum thermal conductivity in the plane direction is 12.7 Wm-1K-1.