@article{Grishchenko2025Xband400,
  author = {L.M. Grishchenko and V.E. Diyuk and D.O. Zhytnyk and I.P. Matushko and Yu.V. Noskov and N.S. Novychenko and R.T. Mariychuk and O.Yu. Boldyrieva and M.V. Makarets and V.V. Klepko and O.V. Mischanchuk and V.V. Lisnyak},
  title = {X-band microwave properties of polyvinyl chloride/oxidized activated carbon thin-film composites},
  journal = {Semiconductor Physics, Quantum Electronics \& Optoelectronics},
  year = {2025},
  volume = {28},
  number = {4},
  pages = {400--412},
  doi = {10.15407/spqeo28.04.400},
  url = {https://doi.org/10.15407/spqeo28.04.400},
  abstract = {Poly(vinyl chloride) (PVC) and oxidized activated carbon (AC-H 2 O 2 ) powders were hot-pressed into thin-film composites (TFCs) with a composition of (PVC) 100–x /(AC-H 2 O 2 ) x , where x = 0.2…30 wt.\%. We investigated the nanostructure, morphology, and composition of the AC-H 2 O 2 filler using scanning electron microscopy and energy dispersive X-ray spectroscopy. Thermal analysis methods were employed to evaluate the thermal stability of the surface carbon-oxygen groups of the AC-H 2 O 2 filler. The effect of AC-H 2 O 2 filler content on the electromagnetic transparency of the (PVC) 100–x /(AC-H 2 O 2 ) x TFCs was evaluated at X-band microwave frequencies. Microwave transmission showed only a weak dependence on the filler concentration. However, reflection losses varied from –21.7 to –11.8 dB as x increased from 0.2 to 30 wt.\%. Comparing analogous composites containing initial AC revealed that filler oxidation significantly affects performance. The difference in the average reflection loss between (PVC) 100–x /(AC-H 2 O 2 ) x and (PVC) 100–x /(AC) x TFCs ranged from –3.4 dB at x < 5 wt.\% to –8.7 dB at x < 20–30\%.},
  keywords = {thin-film composites, poly(vinyl chloride), activated carbon, oxidation, electromagnetic shielding, microwave reflection}
}