Process for the continuous production of aligned carbon...

Details Process for the continuous production of aligned carbon... Process for the continuous production of aligned carbon...

2007-01-09

2007-01-09

Bos, Steven (Department: 1754)

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

C423S447100, C423S447500, C977S742000

Reexamination Certificate

active

10141423

ABSTRACT:
Novel methods and apparati for continuous production of aligned carbon nanotubes are disclosed. In one aspect, the method comprises dispersion of a metal catalyst in a liquid hydrocarbon to form a feed solution, and volatilizing the feed solution in a reactor through which a substrate is continuously passed to allow growth of nanotubes thereon. In another aspect, the apparatus comprises a reactor, a tube-within-a-tube injector, and a conveyor belt for passing a substrate through the reactor. The present invention further discloses a method for restricting the external diameter of carbon nanotubes produced thereby comprising passing the feed solution through injector tubing of a specified diameter, followed by passing the feed solution through an inert, porous medium. The method and apparati of this invention provide a means for producing aligned carbon nanotubes of a particular external diameter which is suitable for large scale production in an industrial setting.

REFERENCES:
patent: 5227142 (1993-07-01), Murai et al.
Jacques, D.; Villain, S.; Rao, A.M.; Andrews, R.; Derbyshire, F.;Dickey, E.C.; Qian, D. “Synthesis of Multiwalled Carbon Nanotubes,” Materials Research Society Symposium Proceedings, vol. 593, 15-20 1999.
Andrews, R.; Jacques, D.; Rao, A.M.; Derbyshire, F.; Qian, D.; Fan, X.; Dickey, E.C.; Chen, J., Continuous Production of Aligned Carbon Nanotubes: A Step Closer to Commercial Realization,: Chemical Physics Letters 303, pp. 467-474, Apr. 16, 1999.

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