Title:
METHOD FOR PURIFYING CARBON-NANOTUBE
Document Type and Number:
Japanese Patent JP2522469
Kind Code:
B2
Abstract:
PURPOSE: To obtain a carbon.nanotube having a uniform molecular weight and size by dispersing a crude product containing the carbon.nanotube in a liquid with ultrasonic waves, passing the resultant dispersion through a chromatographic column and separating the carbon.nanotube.
CONSTITUTION: A crude product containing a carbon.nanotube is dispersed in a liquid with ultrasonic waves. When a surfactant is added, the dispersion state is improved and preferred for preventing the condensation. The dispersion is further passed through a chromatographic column to separate carbonaceous substances other than the nanotube and nanoparticles. Thereby, the carbon.nanotube is separated by a difference in developing speed in the column. The nanotube uniform in regard to electric conductivity can be obtained by electrostatic separation.
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Inventors:
HIURA HIDEFUMI
EBUSON TOOMASU
EBUSON TOOMASU
Application Number:
JP1438793A
Publication Date:
August 07, 1996
Filing Date:
February 01, 1993
Export Citation:
Assignee:
NIPPON ELECTRIC CO
International Classes:
B01D61/14; C01B31/02; C30B33/00; D01F9/12; (IPC1-7): D01F9/12; B01D61/14; C01B31/02; C30B33/00
Domestic Patent References:
| JP517114A | ||||
| JP62133119A | ||||
| JP59012A | ||||
| JP2213758A |
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)
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