• 专利标题:   Preparation of graphene involves dispersing graphite in solvent containing surfactant, stirring to obtain graphite dispersion, sending graphite dispersion to the cavitation element, centrifuging and freeze-drying.
  • 专利号:   CN108975321-A
  • 发明人:   ZHANG Z, JI J, JIN H
  • 专利权人:   UNIV ZHEJIANG TECHNOLOGY
  • 国际专利分类:   C01B032/19
  • 专利详细信息:   CN108975321-A 11 Dec 2018 C01B-032/19 201906 Pages: 9 Chinese
  • 申请详细信息:   CN108975321-A CN11024752 04 Sep 2018
  • 优先权号:   CN11024752

▎ 摘  要

NOVELTY - Preparation of graphene comprises dispersing graphite in solvent containing surfactant, stirring to obtain graphite dispersion where initial concentration of graphite is 1-200 g/L, sending graphite dispersion to the cavitation element at flowrate of 0.5-50000 L/hour, keeping cavitation pressure of 0.1-50 MPa, controlling temperature of water bath to 4-50 degrees C during cavitation process to obtain cavitation dispersion, transporting the primary cavitation dispersion into the cavitation element, repeating the operation for 1-200 times to obtain dispersion, collecting the dispersion, centrifuging at speed of 500-1000 revolutions/minute for 5-120 minutes, taking the supernatant and freeze-drying. USE - Method for preparing graphene. ADVANTAGE - The method is simple and has high stripping efficiency, good product quality, low energy consumption, no environmental pollution and easy scale production.