Electrical conductivity and electromagnetic interference shielding efficiency of carbon nanotube/cellulose composite paper

Composite material consisting of carbon nanotubes (CNTs) combined with cellulose paper has been developed. The CNTs form a continuously interconnected network on the cellulose fibers and the conditions for the mass production of the paper have been optimized. Paper containing 8.32 wt% CNTs is electrically conductive with a volume resistance of 5.3 x 10(-10) Omega cm. The composite paper is capable of shielding electromagnetic interference over the tested range of 15-40 GHz, particularly in range of 30-40 GHz, with absorption as the essential shielding mechanism. The paper is physically strong yet highly flexible. (C) 2008 Elsevier Ltd. All rights reserved.