• 专利标题:   Hollow fiber nanofiltration membrane based on oxidized graphite, for use in solvent concentrations such as Hexane EtOH, IPA, DMF, MeOH, and ACN, comprises polyimide hollow fiber film and oxide graphene inner selection layer surface in polyimide base film.
  • 专利号:   CN114471155-A, CN114471155-B
  • 发明人:   XING W, SUN Y, LIU M, ZHANG C, SUN S
  • 专利权人:   UNIV NANJING TECHNOLOGY
  • 国际专利分类:   B01D061/00, B01D067/00, B01D069/08, B01D071/64
  • 专利详细信息:   CN114471155-A 13 May 2022 B01D-061/00 202286 Chinese
  • 申请详细信息:   CN114471155-A CN11515205 13 Dec 2021
  • 优先权号:   CN11515205

▎ 摘  要

NOVELTY - Hollow fiber nanofiltration membrane based on oxidized graphite comprises a polyimide hollow fiber film and an oxide graphene inner selection layer surface in the polyimide base film USE - Hollow fiber nanofiltration membrane based on oxidized graphite (claimed), for use in a solvent concentration such as Hexane EtOH, IPA, DMF, MeOH, and ACN. ADVANTAGE - The hollow fiber nano-filtration membrane has enhanced nanofiltration performance and has effectively inhibited the larger structure defect, and can be orderly assembled to the PI base film from bottom to top. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for preparing hollow fiber nanofiltration membrane based on oxidized graphite, which involves preparing hollow fiber film, dispersing the oxidation graphene in water, and adding a certain amount of trimethylene tetramine cross-linking agent to form an oxidation graphene liquid, and using dead-end filtering method to coat the oxidation graphene liquid on the inner surface of the polyimide hollow fiber film to form a graphene oxide in the selected layer.