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

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KALKAN ERDOĞAN M., SAÇAK M.

GAZI UNIVERSITY JOURNAL OF SCIENCE, cilt.34, sa.2, ss.381-394, 2021 (ESCI) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 34 Sayı: 2
  • Basım Tarihi: 2021
  • Doi Numarası: 10.35378/gujs.726857
  • Dergi Adı: GAZI UNIVERSITY JOURNAL OF SCIENCE
  • Derginin Tarandığı İndeksler: Emerging Sources Citation Index (ESCI), Scopus, Academic Search Premier, Aerospace Database, Aquatic Science & Fisheries Abstracts (ASFA), Communication Abstracts, Compendex, Metadex, Civil Engineering Abstracts, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.381-394
  • Anahtar Kelimeler: Polyaniline composite film, Modified PVA, Film casting, EMI shielding, POLYANILINE NANOPARTICLES, POLYMER COMPOSITES, CONTACT ANGLES, POLYPYRROLE, CONDUCTIVITY, ACID
  • Ankara Üniversitesi Adresli: Evet

Özet

This work reports the preparation of a conductive composite film, from one of the most conductive polymers, polyaniline (PAn), and a methacryloyl group attached-poly(vinyl alcohol) (M-PVA), in a few straightforward process steps. First, the -OH groups of PVA were modified through trans-esterification reaction using glycidyl methacrylate (GMA), in the presence of N, N, N, N-tetramethylethylenediamine (TEMED) as a catalyst at 60 degrees C. 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 (%) and conductivity. It was observed that the conductivity of the thin and almost transparent composite films (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 (EMI) shielding was examined within 30 MHz-3 GHz, through the measurement of electromagnetic interference shielding effectiveness (EMSE) and relative shielding efficiency values of absorption (Ab) and reflection (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.