• 专利标题:   Production of graphene paper involves injecting graphite flakes and stripping liquid to kettle, heating mixed material, discharging upper suspension to storage tank, centrifuging graphene suspension, washing dried film and drying.
  • 专利号:   CN105883761-A
  • 发明人:   DAI J
  • 专利权人:   DAI J
  • 国际专利分类:   C01B031/04
  • 专利详细信息:   CN105883761-A 24 Aug 2016 C01B-031/04 201678 Pages: 5 Chinese
  • 申请详细信息:   CN105883761-A CN10750520 09 Dec 2014
  • 优先权号:   CN10750520

▎ 摘  要

NOVELTY - Production of graphene paper involves injecting graphite flakes and stripping liquid into kettle with stirrer, stirring to obtain evenly mixed material, heating the kettle and maintaining temperature at 50-150 degrees C, discharging upper suspension through discharge outlet to storage tank, allowing to stand for more than 24 hours to obtain an initial product, passing graphene suspension from storage tank to centrifuge, centrifuging mixture, taking spin-coated clear liquid, drying to obtain crude film, spraying ethanol on film, washing using distilled water and drying. USE - Production of graphene paper (claimed). ADVANTAGE - The method produces high efficiency graphene paper. DETAILED DESCRIPTION - Production of graphene paper involves (a) pouring graphite flakes and stripping liquid into kettle with stirrer according to the weight ratio of 1:2-5, stirring is started by the motor of the kettle to obtain evenly mixed material where the stripping liquid comprises 100 pts. wt. vegetable oil, 30-50 pts. wt. non-aqueous polar solvent and 1-3 pts. wt. dispersant, (b) heating the kettle and maintaining temperature at 50-150 degrees C with the pressure of 1-3 atmosphere, stirring with a stirrer at 1000-2000 rpm for 3-6 hours, (c) discharging the upper suspension through discharge outlet to the storage tank after stopping the reaction, allowing to stand for more than 24 hours to obtain an initial product, (d) passing the graphene suspension from storage tank to the centrifuge, centrifuging with the speed of 1000-6000 rpm for 10 minutes-2 hours, taking the clear liquid which is spin-coated and drying to obtain the crude film and (e) spraying ethanol on the film, washing with distilled water, and drying using freeze-dryer.