The electromagnetic shielding effectiveness of carbon nanotubes polymer composites

Abstract

The electromagnetic (EM) shielding effectiveness (SE) in plastics, of carbon nanotubes (CNTs) or multi-wall nanotubes (MWNTs) has been investigated. There are two kinds of CNTs with aspect ratio of 500 and 10,000 were added into a plastic as composites. The SE of both CNTs composites is higher than 40 dB, which is a requirement for industrial application. The two types MWNTs were compounded with two kinds of polymeric materials, such as liquid crystal polymers (LCPs) and melamine resins (MF). The highest SE of these composites was 60 dB which is realistic for an industrial application. It is noted that the higher the aspect ratio, the higher is the SE of nano-composites. The results of this study make the CNTs with effective EM shielding effectiveness that is suitable for use as electronic conductive fillers in plastic package. © 2006 Elsevier B.V. All rights reserved.