Effective Electromagnetic Shield using Conductive Polyaniline Films

The present work is focused on the impressive electromagnetic shielding effectiveness of doped polyaniline films in the C and X bands of the electromagnetic spectrum. The observed value of shielding effectiveness of about 37dB is found to depend on the electrical conductivity and crystallinity of the films. The films synthesised by self-stabilised dispersion polymerisation are found to be crystalline with appreciable electrical conductivity as evident from the structural and morphological characterizations. The interesting feature is that most of the literature available on the shielding effectiveness of polyaniline is restricted to thicker films. The values reported here for the C and X bands comply with the commercial standards and are quite appreciable for micrometre thick films (c) 2019 Elsevier Ltd. All rights reserved.