Abstract
The use of plastic materials as shielding enclosures, electromagnetic (EM) absorbing materials, and radio frequency (RF) components has greatly increased in the past few years. Shielding deals with the protection of workspaces from external radiation, usually achieved by conductive materials by means of wave reflection. In absorbing media, the incident wave energy is dissipated within lossy medium. Such EM properties can be modulated by adding conductive fillers (such as carbon nanotubes, CNTs) to an insulating matrix. In this chapter, the shielding and absorbing performance of CNT-loaded polymers is described and their intrinsic electromagnetic properties (complex permittivity and conductivity) are correlated to material composition and microstructure.
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