SWCNT and PANI Nanocomposite Thin Films Fabrication for Improved EMI Shielding Effectiveness

Abstract

Thin films using Single Walled Carbon Nano Tubes with Polyaniline (SWCNT/ PANI) were fabricated through various techniques for Electromagnetic Interference (EMI) shielding applications over X - band. SWCNT wt% is maintained uniformly for all the samples. The Shielding Effectiveness (SE) due to microwave absorption and reflection mechanisms of all the three samples was measured through Vector Network Analyzer (VNA). The total SE obtained from samples fabricated using various techniques resulted in a maximum of 56.9 dB (which is equal to 1.4225 dB/µm). These results emphasize that the SWCNT/PANI Nanocomposite (SPN) thin films fabricated are promising materials for electromagnetic shielding applications. Apart from the SE characteristics, the fabrication processes, morphology and structure of the composites were analyzed to perceive the best fabrication technique for preparation of the nanocomposites for EMI shielding.