• 专利标题:   Producing a transparent and conductive film, comprises applying a dispersion comprising graphene flakes and a solvent to a surface of a substrate, removing the solvent from the dispersion, and functionalizing the graphene flakes.
  • 专利号:   US2009017211-A1, US7785557-B2
  • 发明人:   GRUNER G, HU L, HECHT D
  • 专利权人:   UNIDYM INC, UNIDYM INC
  • 国际专利分类:   B05D001/38, B05D005/00, H01B019/04
  • 专利详细信息:   US2009017211-A1 15 Jan 2009 B05D-001/38 200908 Pages: 10 English
  • 申请详细信息:   US2009017211-A1 US237361 24 Sep 2008
  • 优先权号:   US812977P, US237361

▎ 摘  要

NOVELTY - The method of producing a transparent and conductive film, comprises applying a dispersion comprising graphene flakes and a solvent to a surface of a substrate, removing the solvent from the dispersion such that the graphene flakes form an interconnected network, functionalizing the graphene flakes, applying a polymer to the interconnected network, and pre-treating the surface to enhance adhesion of the graphene flakes. The dispersion comprises a surfactant and carbon nanotubes. The interconnected network has a sheet resistance of less than 50 kOhms/sq, and an optical transparency of 50%. USE - The method is useful for producing a transparent and conductive film, which is useful in touch screens (e.g., analog, resistive, improved analog, X/Y matrix and capacitive), flexible displays (e.g., electrophoretics, electroluminescence and electrochromatic), rigid displays (e.g., liquid crystal display, plasma display panel and organic light emitting diode), solar cells, fiber-optic communications (e.g., electro-optic and opto-electric modulators) and microfluidics (e.g. electrowetting on dielectric). ADVANTAGE - The method is capable of effectively producing a high optical transparent and high electrical conductive film with right combination in improved manner. DETAILED DESCRIPTION - The method of producing a transparent and conductive film, comprises applying a dispersion comprising graphene flakes and a solvent to a surface of a substrate, removing the solvent from the dispersion such that the graphene flakes form an interconnected network, functionalizing the graphene flakes, applying a polymer to the interconnected network, and pre-treating the surface to enhance adhesion of the graphene flakes. The dispersion comprises a surfactant and carbon nanotubes. The interconnected network has a sheet resistance of less than 50 kOhms/sq, and an optical transparency of 50%. The polymer forms a distinct layer adjacent to the graphene flakes, and a composite with the graphene flakes, which are functionalized. DESCRIPTION OF DRAWING(S) - The diagram shows a view of a graphene flake-carbon nanotube network.