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

Area of Science:

• Materials Science
• Nanotechnology
• Solid State Physics

Background:

• High-pressure polyethylene applications can be expanded by incorporating nanoscale fillers.
• Nickel ferrite (NiFe2O4) nanoparticles offer unique magnetic and electrical properties.

Purpose of the Study:

• Synthesize and characterize NiFe2O4/polyethylene nanocomposites.
• Investigate the influence of nanoparticle concentration on material properties.
• Determine the suitability of these composites for electromagnetic compatibility.

Main Methods:

• Thermal decomposition for nanoparticle synthesis.
• Transmission electron microscopy (TEM) for particle size analysis.
• Mössbauer spectroscopy, X-ray diffraction (XRD), and X-ray absorption spectroscopy (XAS) for structural analysis.
• Electrical resistivity, dielectric permittivity, and microwave power measurements.

Main Results:

• Nanocomposites synthesized with NiFe2O4 particle sizes of 2-4 nm.
• Percolation threshold observed between 20-30% nanoparticle concentration.
• Atomic structure analysis confirmed NiFe2O4 phase.
• Established dependence of nanoparticle size and iron site occupancy on concentration.

Conclusions:

• NiFe2O4/polyethylene composites exhibit concentration-dependent electrical and magnetic properties.
• These materials demonstrate potential as components in electromagnetic compatibility systems.
• Nanoparticle characteristics can be tuned by controlling their content in the polyethylene matrix.