▎ 摘　　要

NOVELTY - Preparing graphene/Magnéli phase TinO2n-1 nanoparticle composite high thermal conductivity film comprises preparation of Magnéli phase TinO2n-1 nanoparticles, using commercially available titanium(III) oxide or titanium suboxide microparticles as raw materials, and preparing titanium (II) oxide or titanium suboxide nanoparticles; (ii) adding sulfuric acid, ammonium persulfate, and natural graphite to a beaker, stirring appropriately, dripping hydrogen peroxide, letting beaker stand, adding 2 ml of previously synthesized graphene dispersion, (iv) preparation of graphene/Ti2O3 or Ti4O7 composite film, diluting graphene/Ti2O3 or Ti4O7 composite dispersion into deionized water, sonicating it disperse uniformly, peeling off graphene/Ti2O3 or Ti4O7 composite film from the filter membrane surface with tweezers, drying in an oven, and finally preparing a graphene/Magneli phase TinO2n-1 nanoparticle composite high thermal conductivity film. USE - Preparation method of graphene high heat-conducting film of graphene /Magn phase TinO22n-1. Uses include but are not limited to mobile phone, computer, aerospace vehicle control system and electronic instrument device. ADVANTAGE - The graphene high heat-conducting film has high heat conductivity, high stability, and high heat conducting performance, and can be applied to the electronic product to solve the heating problem of new film material. The nano particles effectively filled with the wrinkle of the graphene sheet layer, a gap, gap, hole and so on, so that the film exhibits a more uniform distribution state to make it have high heat conduction performance. DETAILED DESCRIPTION - Preparing graphene/Magnéli phase TinO2n-1 nanoparticle composite high thermal conductivity film comprises preparation of Magnéli phase TinO2n-1 nanoparticles, using commercially available titanium(III) oxide or titanium suboxide microparticles as raw materials, using ball milling to make them into nanoparticles, and preparing titanium (II) oxide or titanium suboxide nanoparticles; (ii) adding sulphuric acid, Ammonium persulfate, and natural graphite to a beaker, stirring appropriately, slowly dripping a certain amount of hydrogen peroxide, letting the beaker stand at room temperature for a period of time, obtaining fully expanded graphene aggregates, washing the graphene aggregates to neutral, adding the graphene aggregates to N-methylpyrrolidone, sonicating for a period of time with a cell disruptor, centrifuging, retaining the upper layer of liquid, and obtaining a stable graphene nanosheet dispersion; adding 2 ml of previously synthesized graphene dispersion, sonicating it to disperse uniformly, dispersing a certain amount of Ti2O3 or Ti4O7 nanoparticles in a certain amount of water, obtaining Ti2O3 or Ti4O7 dispersion, adding Ti2O3 or Ti4O7 dispersion into the graphene dispersion under fast stirring, and the obtained product is graphene/Ti2O3 or Ti4O7 composite dispersion; (iv) preparation of graphene/Ti2O3 or Ti4O7 composite film, diluting graphene/Ti2O3 or Ti4O7 composite dispersion into deionized water, sonicating it disperse uniformly, using a mixed fiber microporous membrane for vacuum filtration, adding an equal volume of deionized water for washing once before finishing the filtration, filtration, a layer of graphene/Ti2O3 or Ti4O7 composite film appears on the filter membrane, peeling off graphene/Ti2O3 or Ti4O7 composite film from the filter membrane surface with tweezers, drying in an oven, and finally preparing a graphene/Magneli phase TinO2n-1 nanoparticle composite high thermal conductivity film. An INDEPENDENT CLAIM is also included for graphene composite high heat-conducting film of the ijli-phase TinOn- nano-particle.