The Electromagnetic Interference Shielding Effectiveness and Dielectric Response of PVDF-nTiO2Nanocomposites Thin Films

Abstract

This paper presents electromagnetic interference (EMI) shielding effectiveness (SE) and dielectric response of Polyvinylidene Fluoride (PVDF) and PVDF-Titanium dioxide (nTiO2) nanocomposite thin films. nTiO2 nanoparticles were synthesized by the combustion method using urea as fuel. PVDF and PVDF-nTiO2nanocomposite thin films of different wt% of TiO2as fillers in the PVDF matrix were prepared using the solvent evaporation method. The synthesized nanocomposite thin films were characterized by XRD, FTIR, and SEM. The EMI-SE was studied in the frequency range 0.5-8GHz and dielectric response in 10Hz-8MHz at room temperature. The EMI-SE shows up and down valleys in S-Band with an average variation of ⁓28 and ⁓35 dB at 2 and 4GHz respectively and remains stable in C-Band agreeing with existing literature. The dielectric constant of PVDF-nTiO2 nanocomposite thin films decreases with an increase in frequency and anomaly for 10wt% of nTiO2 fillers in the PVDF matrix at standard frequency.