Microstructural and Magnetic Properties of Polyamide-Based Recycled Composite with Iron Oxide Nanoparticles

• DOI: 10.20944/preprints202411.1029.v1
• Publication Date: 2024-11-19T01:21:57Z
• Authors: Lucas G. Dos Santos; Daina D. A. Buelvas; Daniel F. Valezi; Bruno L. S. Vicentin; Christian Manuel ...; Eduardo Di Mauro; Felipe de A. La P...
• Keywords: Iron oxide nanoparticles

This study explores a sustainable approach to developing magnetic nanocomposites by synthesizing mixed-phase iron oxide (IO) and recycled polyamide (RPA) composite derived from textile waste. The RPA/IO nanocomposite’s microstructural properties were characterized using X-ray diffraction (XRD) with Rietveld refinement, scanning, transmission electron microscopy (SEM, TEM), vibrating sample magnetometry (VSM), Mössbauer spectroscopy. XRD confirmed the presence of both magnetite (Fe₃O₄) maghemite (γ-Fe₂O₃) phases, refinement indicating 79.4 wt% Fe₃O₄. SEM TEM showed porous, agglomerated IO surface morphology an average particle size 14 nm. Magnetic analysis re-vealed ferrimagnetic superparamagnetic behavior, VSM showing saturation magnetization values 22.2 emu/g at 5 K 19.1 300 K. Anisotropy constants estimated 2.90×10⁵ 1.26×10⁵, respectively, for composite, blocking temperature approximately 149 spec-troscopy Fe₃O₄ γ-Fe₂O₃ RPA matrix did not significantly impact IO’s crystal structure. These findings contribute understanding behavior their nano-composites, which is crucial potential applications in emerging technologies.