Patent ID: 8057901

Claim:
A composite material comprising: carbon nanotubes; and a Me-carbonate, wherein Me represents a metal cation, wherein said carbon nanotubes have attached thereto functional groups comprising oxygen atoms, wherein said functional groups comprising oxygen atoms are selected from the group consisting of â€”COOH and â€”OH, wherein said carbon nanotubes with attached functional groups comprising oxygen atoms have been mixed with urea and then heated to a temperature greater than the melting point of urea, such that urea, or a decomposition product thereof, react to modify said functional groups comprising oxygen atoms, or polymerize, to introduce new functional groups, said new functional groups being â€”CONHCONH 2 , and wherein said functional groups comprising oxygen atoms and said new functional groups, which are attached to said carbon nanotubes, make the carbon nanotubes dispersible in a polar solvent.