Purification process of carbon nanotubes
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United States of America Patent
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Jul 11, 2006
Grant Date -
Oct 20, 2005
app pub date -
Jul 29, 2003
filing date -
Aug 1, 2002
priority date (Note) -
Expired
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Abstract
The present invention describes a new method for the purification of carbon nanotubes from contaminants deriving from industrial production, constituted by amorphous or carbon crystalline material and metals used for catalysis. The method provides for their organic furretionalization obtaining dirivatized nanotubes, precipitation of functionalized nanotubes and subsequent regeneration of non-functionalized nanotubes by heat treatment.
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