• 专利标题:   Preparing graphene heat dissipation film, involves obtaining graphite dispersion, adding liquid resin and film-forming agent into mixed dispersion, placing graphite conductive sheet in sulfuric acid solution, adding liquid resin into graphene water dispersion solution and peeling off metal substrate.
  • 专利号:   CN116062740-A
  • 发明人:   HONG J, YE J, LIU M, HUANG W, LIN J
  • 专利权人:   XIAMEN KNANO GRAPHENE TECHNOLOGY CO LTD
  • 国际专利分类:   C01B032/19, C01B032/194, C25B001/135, H05K007/20
  • 专利详细信息:   CN116062740-A 05 May 2023 C01B-032/19 202349 Chinese
  • 申请详细信息:   CN116062740-A CN10146630 21 Feb 2023
  • 优先权号:   CN10146630

▎ 摘  要

NOVELTY - Preparing graphene heat dissipation film, comprises (a) adding proper amount of graphite powder, dispersant and defoamer into ethanol successively, shearing and homogenizing to obtain graphite mixed solution, adding the obtained graphite mixed solution into proper amount of N-methylpyrrolidone, and ultrasonically stirring and mixing to obtain a graphite dispersion; (b) preparing a mixed dispersion liquid, and adding metal nanowires into N-methylpyrrolidone for dispersion to obtain a metal nanowire dispersion liquid, ultrasonically oscillating and mixing graphite dispersion liquid and metal nanowire dispersion liquid to obtain a mixed dispersion liquid; (c) adding liquid resin and film-forming agent into the mixed dispersion, and mixing uniformly to form a graphite slurry, coating graphite slurry on the graphite paper by doctor blade coating, curing, and heating the coating to carbonize to prepare a graphite conductive sheet. USE - Preparation method of graphene heat dissipation film. ADVANTAGE - The method enables to prepare graphene radiating film that is capable of obtaining the graphene film product with uniform dispersion, reduces the presence of impurities, and reduces the number of stacked graphene, the proportion of 13C in the graphene, improves the content of 12C, and improves the thermal conductivity graphene the radiating films, closer to the heat-conducting effect of the single-layer graphene. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the whole process of a preparation method of graphene heat dissipation film (Drawing includes non-English language text).