Dispersant for carbon nanotube and composition comprising the same

A composition comprising:

• a carbon nanotube;
• a dispersion medium selected from an organic solvent, water and a mixture thereof;
• and
• a dispersant for a carbon nanotube, the dispersant comprising:
• a head part selected from the group consisting of —SH, —NH2 and a group represented by Formula 1 below:
• wherein X represents S, NH or O, and
• l represents an integer from 1 to 60;
• and
• a tail part represented by Formula 2 below:
• wherein Y is selected from the group consisting of substituted or unsubstituted C1-C10 alkylene, substituted or unsubstituted C1-C10 alkenylene, substituted or unsubstituted C1-C10 alkynylene and substituted or unsubstituted C6-C20 arylalkylene,
• Z is selected from the group consisting of —H, —CH3, —OH or a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof and phosphoric acid or a salt thereof,
• a represents 0 or 1,
• m represents an integer from 1 to 9, and
• n represents an integer from 0 to 9.