Nanostructured ternary composites of PPy/CNT/NiFe2O4 and PPy/CNT/CoFe2O4: Delineating and improving microwave absorption

Abstract

Two different ternary nanocomposites, PPy/CNT/CoFe 2 O 4 and PPy/CNT/NiFe 2 O 4 , were synthesized by in situ polymerization method. The resulting composites were characterized using Fourier transform infrared spectroscopy, transmission electron microscopy, scanning electron microscopy, energy-dispersive spectroscopy, and X-ray diffraction. They were evaluated with the aim of investigating microwave absorption properties. The results showed that the value of microwave reflection decreases as that of prepared nanocomposites increases. This happens with increase in the PPy content and polymerization on the surface.

Electrical and Magnetic Properties of Polymeric Nanocomposites Based on Nickel Ferrites Modified by Copper Sulphide

“…Absorbing coatings can work on the principle of interference, scattering of EM waves, absorption of electromagnetic energy. Often, different principles are combined to create absorbing electromagnetic coatings [3,4]. Such coatings can be created based on ferrites (characterized by high magnetic losses), complex organic compounds, carbon and semiconductor materials.…”

“…For intensification of the EM wave adsorption use of magnetic nanoparticles modified at the interface by conductive components (carbon and semiconductor materials, metallic particles, conductive polymers etc. [4,[8][9][10][11].…”