Patent ID: 7812083

Claim:
A method for the preparation of a suspension of carbon nanotubes at a concentration of from 0.5 wt % to 10 wt %, comprising a. adding to a fluid medium a material comprising carbon nanotubes; b. dissolving a block copolymer in the desired concentration ranging from 0.3 wt % to 10 wt % in said fluid medium, prior to the addition of carbon nanotubes or thereafter, wherein the mass ratio of said copolymer to carbon nanotubes ranges from 0.1 to 10; and c. stirring said fluid medium comprising sonication; thereby to bring about de-agglomeration of the nanotubes into dispersed small bundles of nanotubes or essentially single tubes, said fluid medium being a solvent selective toward at least two blocks of said block copolymer.