Freestanding conducting polyaniline film for the controlof electromagnetic radiations

Electromagnetic interference is pollution generated due to dense nature of circuitry in electronic devices and is required to becontrol at its source. Polyaniline is an environmentally stable conducting polymer which can be cast as thin lm, which can replacethe corrosive metals as a shield for the control of electromagnetic radiations. In this communication we discuss our results on thepreparation of exible freestanding conducting polyaniline lm of varied thickness using eitherp-toluenesulphonic acid (PTSA) orcamphor-10-sulphonic acid as a primary dopant and 4-chloro-3-methyl phenol (CMC) as a secondary dopant. The resulting lmswere characterized by conductivity, scanning electron micrograph and shielding eectiveness measurements (SE). The SE measure-ments were carried out using co-axial transmission line method in the frequency range of 0.11000MHz. We noticed that only thechange of 2% in the shielding eectiveness of these lms over the period of 3 years indicating the environmental stability of poly-aniline lms.. KCI Citation Count: 26