Electromagnetic Shielding Effectiveness of Polyaniline/Modified-Poly(vinyl Alcohol) Film Composite

Authors : Meryem KALKAN ERDOĞAN, Mehmet SAÇAK

Pages : 381-394

Doi:10.35378/gujs.726857

View : 12 | Download : 3

Publication Date : 2021-06-01

Article Type : Research Paper

Abstract :This work reports the preparation of a conductive composite film, from one of the most conductive polymers, polyaniline insert ignore into journalissuearticles values(PAn);, and a methacryloyl group attached-polyinsert ignore into journalissuearticles values(vinyl alcohol); insert ignore into journalissuearticles values(M-PVA);, in a few straightforward process steps. First, the -OH groups of PVA were modified through trans-esterification reaction using glycidyl methacrylate insert ignore into journalissuearticles values(GMA);, in the presence of N, N, N, N-tetramethylethylenediamine insert ignore into journalissuearticles values(TEMED); as a catalyst at 60 ℃. After casting the M-PVA into the film in the organic media, the polymerization of aniline was performed onto this surface using APS as an oxidant in 1.0 M HCl. The effects of conditions, including the concentrations of M-PVA used for film-casting, and aniline, were investigated on PAn content insert ignore into journalissuearticles values(%); and conductivity. It was observed that the conductivity of the thin and almost transparent composite films insert ignore into journalissuearticles values(containing 17.5% of PAn); reached to 10-4 Scm-1. The characterization of the samples was conducted by ATR-FTIR, contact angle-wetting time measurements, and SEM-EDX techniques. The usability of the conductive composite film in the electromagnetic interference insert ignore into journalissuearticles values(EMI); shielding was examined within 30 MHz-3 GHz, through the measurement of electromagnetic interference shielding effectiveness insert ignore into journalissuearticles values(EMSE); and relative shielding efficiency values of absorption insert ignore into journalissuearticles values(Ab); and reflection insert ignore into journalissuearticles values(Re);. Twice PAn deposited-composite film showed an average 5.6 dB EMSE value that corresponds to 71% of shielding through the Ab mechanism, dominantly.
Keywords : Polyaniline composite film, Modified PVA, Film casting, EMI shielding