• 专利标题:   Ball-milled graphene nano-powder or ribbon purifying method, involves separating magnetic impurities during stirring suspension using magnet, where impurities are incorporated into graphene powder during ball-milling.
  • 专利号:   US2012043402-A1, KR2012017332-A, KR1197027-B1, US8672246-B2
  • 发明人:   LEE J K, LEE K, LEE K I, GAP L J, IL L G
  • 专利权人:   KOREA INST SCI TECHNOLOGY
  • 国际专利分类:   B02C015/00, B01D035/06, C01B031/02, B02C019/00
  • 专利详细信息:   US2012043402-A1 23 Feb 2012 B02C-015/00 201215 Pages: 7 English
  • 申请详细信息:   US2012043402-A1 US211609 17 Aug 2011
  • 优先权号:   KR079964

▎ 摘  要

NOVELTY - The method involves ball-milling a graphite material to form ball-milled graphene powder (1), where the graphite material is in form of a helix. The ball-milling is performed to make graphene powder particle to be of size of hundred nanometer or smaller. The graphene powder is dispersed in a solvent to form a suspension (4). Magnetic impurities (2) are separated during stirring of the suspension using a magnet (3), where the magnetic impurities are incorporated into the graphene powder during ball-milling from balls and dispersed in the suspension. USE - Method for purifying a ball-milled graphene nano-powder or ribbon. ADVANTAGE - The method enables sweeping of light-weight graphene to the magnetic impurities, which are finely or minutely dispersed so as to stick to the magnet, thus purifying graphene powder easily and effectively by removing the magnetic impurities incorporated into the graphene powder. DETAILED DESCRIPTION - The solvent is alcohol, acetone, dimethylformamide, or toluene. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic illustration of a method for purifying graphene powder. Ball-milled graphene powder (1) Magnetic impurities (2) Magnet (3) Suspension (4)