Process for purifying, uncapping and chemically modifying carbon

Details Process for purifying, uncapping and chemically modifying carbon Process for purifying, uncapping and chemically modifying carbon

1995-07-03

1997-12-16

Bos, Steven

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

423460, 423461, 423445B, C01B 3100, D01F 912

Patent

active

056981759

ABSTRACT:
Disclosed is a process for purifying carbon nanotubes which has steps of 1) mixing carbon nanotubes which accompany carbon impurities with a reagent selected from a group consisting of oxidation agents, nitration agents and sulfonation agents in liquid phase, 2) reacting the carbon nanotubes with the reagent at a predetermined temperature in the liquid phase, wherein the carbon impurities except carbon nanotubes are selectively reacted to dissolve in the liquid phase, and 3) separating carbon nanotubes from which the impurities were released from the liquid phase then washing and drying it. A process for uncapping carbon nanotubes and a process for chemically modifying carbon nanotubes are also disclosed.

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T.W. Ebbesen, et al, Purification of nanotubes, Nature International Weekly Journal of Science, Feb. 10, 1994.
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S.C. Tsang, et al, Thinning and opening of carbon nanotubes by oxidation using carbon dioxide, Letters to Nature, Apr. 8, 1993.
T.W. Ebbesen, et al, Large-scale synthesis of carbon nanotubes, Nature International Weekly Journal of Science, Jul. 16, 1992.
Tsang, S.C., et al. "A simple chemical Method of Opening and Filling Carbon Nanotubes", Nature, vol. 372, 10 Nov. 1994, pp. 159-162.

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