Facile preparation of polyvinyl chloride/activated carbon thin-film composites and study of their microwave absorption at Ka-band frequencies
Liudmyla M. Grishchenko, Dmytro О. Zhytnyk, Igor P. Matushko, Yuriy V. Noskov, Vladyslav A. Moiseienko, В.В. Клепко, Olga Yu. Boldyrieva, Yuriy А. Len, N. Atamas, Vitalii A. Marianovskyi, Oleksandr V. Mischanchuk, Vladyslav V. Lisnyak
Abstract
Poly(vinyl chloride) (PVC) and activated carbon (AC) powders were hot-pressed into (PVC)100–x/(AC)x thin-film composites (TFCs), where x = 0.2–30 wt%. The nanostructure, morphology, and composition of AC were investigated by TEM, SEM, and EDX. The thermal stability and surface carbon-oxygen groups of the AC filler were determined by thermolysis in air and vacuum. The AC effect on the (PVC)100–x/(AC)x TFCs transparency to the electromagnetic radiation (EMR) was demonstrated at Ka-band microwave frequencies. Characteristically, the EMR reflection of the TFCs increases with the x value. For reduced EMR reflection, these TFCs should contain only 0.2 wt% AC.