• 专利标题:   Apparatus, useful for preparing graphene-structured material for e.g. filler, comprises supply hopper to supply graphite oxide, supply line of which end is fixed to hopper, and reducing atmosphere gas supply unit connected to supply line.
  • 专利号:   WO2014003251-A1, EP2867162-A1, US2015147235-A1, US9624108-B2, EP2867162-A4
  • 发明人:   JI B K, CHOI J Y, SHIN C M
  • 专利权人:   IDT INT CO LTD, IDT INT CO LTD, JI B K, CHOI J Y, SHIN C M, STANDARD GRAPHENE CO LTD
  • 国际专利分类:   B01J019/18, C01B031/02, C01B031/04, B01J019/10, A61L002/00, A61L009/00, B82Y030/00, B82Y040/00
  • 专利详细信息:   WO2014003251-A1 03 Jan 2014 C01B-031/02 201405 Pages: 15 English
  • 申请详细信息:   WO2014003251-A1 WOKR008804 25 Oct 2012
  • 优先权号:   KR070100

▎ 摘  要

NOVELTY - The apparatus comprises: a supply hopper (21) configured to supply graphite oxide; a supply line (40) of which an end is connected to a lower end of the supply hopper; a reducing atmosphere gas supply unit connected to a side of the supply line; a vertical fluidized bed furnace (11) of which a lower part is connected to an another end of the supply line and configured to reduce the supplied graphite oxide with thermal-expansion; a discharge line of which an end is connected to an upper part of the vertical fluidized bed furnace; and a vibrating type vertical micro filter. USE - The apparatus is useful for preparing a graphene-structured material (claimed), which is useful for a polymer composite material, a filler, a secondary battery, a transistor, a hydrogen gas reservoir, a super capacitor, a top gate and a biosensor. ADVANTAGE - The apparatus economically and continuously prepares the nano-size graphene-structured material, with high thermal conductivity, electric conductivity, strength, specific surface area and flexibility. DETAILED DESCRIPTION - The apparatus comprises: a supply hopper (21) configured to supply graphite oxide; a supply line (40) of which an end is connected to a lower end of the supply hopper; a reducing atmosphere gas supply unit connected to a side of the supply line; a vertical fluidized bed furnace (11) of which a lower part is connected to an another end of the supply line and configured to reduce the supplied graphite oxide with thermal-expansion; a discharge line of which an end is connected to an upper part of the vertical fluidized bed furnace; a vibrating type vertical micro filter connected to an opening portion on a side of the discharge line; a vacuum pump connected to the vertical micro filter; and a collector positioned under the vertical micro filter and connected to another end of the discharge line. The graphite oxide is oxidized under ultrasonication, and has a carbon/oxygen ratio of 1/1-5/1 as an analysis result of an elemental analyzer and a maximum peak in 2 theta of 12-14 degrees according to an X-ray diffraction analysis. The graphene-structured material is a mixture of single-layered graphene and multiple-layered graphene, and includes exfoliated graphite having an average surface area of 200-2600 m2/g. A temperature within the vertical fluidized bed furnace is maintained at 500-1200 degrees C. The atmosphere gas supply unit supplies an inert carrier gas and a reducing gas, and comprises a valve configured to adjust an amount of the inert carrier gas and the reducing gas to be supplied to the supply line. The vertical fluidized bed furnace is provided in a height direction to continuously apply a thermal shock to the graphite oxide vertically rising in the vertical fluidized bed furnace. The discharge line is horizontally connected to the vertical micro filter. DESCRIPTION OF DRAWING(S) - The diagram shows a schematic cross sectional view of an apparatus for preparing a graphene-structured material. Vertical fluidized bed furnace (11) Heater (12) Supply hopper (21) Screw feeder (22) Supply line. (40)