Patent ID: 7456310

Claim:
A cyclic dispersant for carbon nanotubes, comprising a rigid block and a flexible block, with a linkage created therebetween, the rigid block being a π-conjugated oligoarylene represented by Chemical Formula 1 or 2, the flexible block being a polyacrylate or a polyethyleneoxide: [Ar 1 —Ar 2 —Ar 3 ] m [Chemical Formula 1] wherein, Ar 1 , Ar 2 and Ar 3 are each independently an aryl selected from the group consisting of phenyl, naphthyl, pyrenyl, anthryl, perylenyl and triphenylenyl; and m is an integer from 1 to 4; Ar 1 -L-Ar 2 [Chemical Formula 2] wherein Ar 1 and Ar 2 are each independently an aryl selected from the group consisting of phenyl, naphthyl, pyrenyl, anthryl, perylenyl, diphenylenyl, triphenylenyl, tetraphenylenyl, pentaphenylenyl, and hexaphenylenyl; and L is selected from the group consisting of ethylene, allene, and a heteroaromatic hydrocarbon having 5 to 30 carbon atoms.