Patent ID: 8367161

Claim:
A method of preparing carbon nanotube/polymer composite having electromagnetic interference (EMI) shielding effectiveness, which comprises the following steps: a) preparing a polymer solution containing 0.5-10 wt % of carbon nanotubes dispersed therein, based on the weight of the polymer; b) coating the polymer solution containing carbon nanotubes dispersed therein on a substrate and drying the resulting layer coated on the substrate; and c) stacking a plurality of the substrates prepared from step b), each of which has the dried layer; wherein said preparing in step a) comprises dissolving a polymer in an organic solvent and dispersing carbon nanotubes in the resulting polymer solution to form said polymer solution containing carbon nanotubes dispersed therein, and wherein said substrate in step b) is a film of poly(ethylene terephthalate), polyimide, polyethylene, polypropylene, or poly(vinyl chloride).