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US Patent 6872681 - Modification of nanotubes oxidation with peroxygen compounds

US Patent Issued on March 29, 2005
Estimated Patent Expiration Date: Icon_subject May 18, 2021Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
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Abstract

A method of chemically modifying carbon nanotubes having a diameter less than one micron comprising: contacting the nanotubes with a peroxygen compound selected from the group consisting of organic peroxyacids, inorganic peroxoacids and organic hydroperoxides, or a salt thereof, under oxidation conditions and thereby producing modified carbon nanotubes. Oxidation of the nanotubes increases the degree of dispersion of aggregates of nanotubes and aids in the disassembling of such aggregates. The dispersed nanotubes are used to prepare rigid structures and can be used in electrodes and capacitors.

Other References

  • Endo et al, The Production and Structure of Pyrolytic Carbon Nanotubes (PCNTs) in J. Phys. Chem. Solids vol. 54 #12 pp. 1841-1848 (1993), no month.*
  • Formation Process and Structure of Graphite Oxide, Nakajima et al, Carbon, vol. 32, No. 3, pp. 489-475, 1984.
  • Chemical Treatment of Carbon Nanotubes, Esumi et al., Carbon, vol. 34, pp. 279-281, 1996.
  • Solution Properties of Single-Walled Carbon Nanotubes, Jian Chen et al., Science, vol. 282, pp. 95-98, Oct. 2, 1998.
  • Soluble Carbon Nanotubes Open Door On Chemistry, Dagani, Oct. 5, 1998, C&EN.
  • Chemical Attachment of Organic Functional Groups to Single-Walled Carbon Nanotube Material, Chen et al., J Mater. Res., vol. 13, No. 9, pp. 2423-2431, Sep. 1998.
  • High Power Electrochemical Capacitors Based on Carbon Nanotube Electrodes, Niu et al., Appl. Phys. Lett. 70(11) Mar. 17, 1997, pp. 1480-1482.
  • Some Aspects of the Surface Chemistry of Carbon Blacks and Other Carbons, Boehm, Carbon, vol. 32, No. 5, pp. 759-769, 1994.

Inventors

Assignee

Application

No. 09861370 filed on 05/18/2001

US Classes:

502/101, Making catalytic electrode, process only423/447.1Fiber, fabric, or textile

Field of Search

423/447.1, Fiber, fabric, or textile502/101Making catalytic electrode, process only

Examiners

Primary: Hendrickson, Stuart L.

Attorney, Agent or Firm

US Patent References

5641466Method of purifying carbon nanotubes
Issued on: 06/24/1997
Inventor: Ebbesen, et al.

International Class

D01F009/12

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