Microstructural and Microwave Shielding Characteristics of Water-Soluble Polypyrrole-Polyvinyl Alcohol-Graphite Oxide Core-Shell Nanocomposites

摘要

This article reports on a facile route for the preparation of polypyrrole-polyvinyl alcohol-graphite oxide nanocomposites through the polymerization of pyrrole with different concentration (wt%) of graphite oxide using ammonium persulfate as an oxidant. The synthesized nanocomposites were characterized by Fourier transform infrared spectroscopy, and their surface morphologies were studied by scanning electron microscopy and transmission electron microscopy. Their solubility in water, DC conductivity in solution, and the current-voltage characteristics of the nanocomposites were studied. Furthermore, the microwave absorption at 1.0-10.0 MHz and the effects of sample thickness on the microwave absorption were investigated. The composites including higher concentration of graphite oxide showed increased solubility and electrical conductivity, and high electromagnetic shielding effectiveness.