• 专利标题:   Preparing graphene by liquid phase exfoliation, comprises dissolving polyvinylpyrrolidone in anhydrous alcohol, mixing flake graphite powder and concentrated aqueous ammonia or ammonium bicarbonate, mixing mixture of graphite powder and alcohol, and carrying out ultrasonic dispersion treatment.
  • 专利号:   CN114436250-A
  • 发明人:   WEN G, LIU T, WANG X, HUANG M
  • 专利权人:   SIHUI FUJI ELECTRONICS TECHNOLOGY CO LTD
  • 国际专利分类:   C01B032/19
  • 专利详细信息:   CN114436250-A 06 May 2022 C01B-032/19 202263 Chinese
  • 申请详细信息:   CN114436250-A CN11213669 04 Nov 2020
  • 优先权号:   CN11213669

▎ 摘  要

NOVELTY - Preparing graphene by liquid phase exfoliation, comprises dissolving polyvinylpyrrolidone in anhydrous alcohol to obtain an alcohol mixture of 0.1 mg/l, mixing the flake graphite powder and concentrated aqueous ammonia (25-28%) or ammonium bicarbonate according to the ratio of weight ratio 3-5:1 to obtain the mixture of graphite powder, mixing the mixture of graphite powder and alcohol mixture according to the weight ratio of 0.5-1.5% in a closed container, carrying out ultrasonic dispersion treatment for more than 20 hours, allowing to stand for more than 20 hours, and taking the upper layer mixed solution to obtain liquid-phase graphene. USE - The method is useful for preparing graphene by liquid phase exfoliation. ADVANTAGE - The method is simple and easy to obtain, cost-effective, and environmentally-friendly, and provides liquid-phase peeling preparation graphite with high stability.