Nanocomposites Based on Polyethylene and Nickel Ferrite: Preparation, Characterization, and Properties

Composite materials based on NiFe2O4 nanoparticles and polyethylene matrix have been synthesized by thermal decomposition to expand the application area of high-pressure polyethylene by filling it with nanoscale particles. The synthesized compositions were obtained in the form of a dark gray powder and compressed for further study According to TEM, the average particle size in composites was 2, 3, and 4 nm in samples with a filling of 10%, 20% and 30%. The concentration dependences of the specific electrical resistivity rho V, dielectric permittivity epsilon, saturation magnetization MS and the parameters of reflection and attenuation of microwave power of the obtained composites were investigated. The threshold for percolation in such materials is found to be within a concentration range of 20 horizontal ellipsis 30%. The electronic and atomic structure of composites was studied by methods of Mossbauer spectroscopy, X-ray diffraction and X-ray absorption spectroscopy. The closest atomic environment of nickel and iron in nanoparticles is close to that of crystalline NiFe2O4. The dependence of the nanoparticles size as well as the dependence of the number of tetrahedral or octahedral iron positions in nickel ferrite nanoparticles to their content in polyethylene matrix is established. It is shown that composite materials based on NiFe2O4 nanoparticles and polyethylene matrix can be used as components of electromagnetic compatibility systems.

Automated summary

Composite materials based on NiFe2O4 nanoparticles and polyethylene matrix were synthesized to expand the application area of high-pressure polyethylene. The physical characteristics and distribution of nanoparticles in the matrix were studied, and a percolation threshold within a concentration range of 20% to 30% was identified. Furthermore, the analysis of the electronic and atomic structure of the composite materials showed their suitability as components of electromagnetic compatibility systems.