Electrodynamic properties of the nanocarbon/polymer composites with aligned by magnetic field secondary non-conductive component

Abstract

Multiwall carbon nanotubes/epoxy and graphite nanoplatelets/epoxy composite materials (2-5 wt %) as well as the composite materials with barium hexaferrite as secondary filler (27 wt %) were prepared. Alignment of barium hexaferrite nanoparticles was performed by magnetic field action during polymerization process. Morphology, the electrical conductivity and shielding efficiency of the composite materials in the frequency range of 36-55.5 GHz were investigated. Optical and electron microscopy, standard 2-and 4-probe methods of electrical conductivity measurement and network analyzer were used for that purpose. The arguments about secondary filler addition and its alignment on electrodynamic properties of the obtained composite materials are given.

Effect of magnetic field treatment on the electromagnetic properties of polymer composite based on barium hexaferrite at microwave frequencies

“…Figure 3,b shows the magnetic field lines. Similar results obtained in [17]. The external magnetic field was equal to 0.64 T. The authors [17] studied a mixture with nanotubes and ferrite fillers.…”

Synthesis of sandwich microstructured expanded graphite/barium ferrite connected with carbon nanotube composite and its electromagnetic wave absorbing properties

“…[5] Especially, carbon materials such as graphite, graphene, expanded graphite (EG), single-or multi-walled carbon nanotubes (SWCNTs, MWCNTs), carbon fibers, conducting polymers have been widely used as EMW absorbing materials due to their lightweight, high conductivity, high stability and good dielectric properties. [6][7][8][9] Metal materials such as nickel,…”