Abstract
In this chapter, the electromagnetic interference shielding effectiveness (EMISE) of carbon based polymer composites is discussed in details. The basic principle of EMI, EMI shielding, and its theory are mentioned herein. The basic requirement of EMI SE of a material is its electrical conductivity. It has been mentioned that electrical conductivity of 0.5 S/cm is required to produce at least 30 dB attenuation. As non-conducting materials exhibit negligible EMI SE, hence EMI SE of polymer-carbon composites based on only conducting carbons like carbon black, carbon fiber, carbon nanotubes, and graphene are reported within this chapter. EMI SE depends on many factors like nature of filler, filler concentration, nature of polymer, filler geometry, polymer blending, sample thickness, frequency of radiation, etc. These governing factors of EMI SE are discussed is details at the end of this chapter.