Design of synthesized hybrid magnetite filler in the porous texture of activated carbon and influence on the microwave properties of natural rubber composites

Abstract

The aim of our study is to synthesize nano-sized magnetite in the porous texture of activated carbon (with different concentration). Our main hypothesis is that the porous texture of activated carbon contains a significant amount of nano-sized pores. By steric reasons if magnetite synthesized in situ in the porous texture of activated carbon, it will be nanosized too. The fillers have been characterized by X-ray diffraction and photoelectron spectroscopy, establishing the influence of the magnetite layer on the texture characteristics. It has been exploring the impact of the synthesized hybrid fillers on the microwave properties and effectiveness of electromagnetic shielding — the real and imaginary part of permittivity and permeability, as well as the influence on the some physics mechanical properties of the composites. The obtained results show that the filler comprising about 5% magnetic phase is the most effective. Introduction of magnetic phase leads to improvement in the microwave properties of the composites and expanding the frequency range of the examined hybrid materials.