Microstructural and Magnetic Properties of Polyamide-Based Recycled Composites with Iron Oxide Nanoparticles
Lucas G. Dos Santos,
Daina D. A. Buelvas,
Daniel F. Valezi,
Bruno L. S. Vicentin,
Christian M. M. Rocha,
Eduardo Di Mauro,
Felipe de A. La Porta
Affiliations
Lucas G. Dos Santos
Department of Physics, State University of Londrina, Paraná- Rodovia Celso Garcia Cid, PR-445, Km 380, Londrina 86057-970, Brazil
Daina D. A. Buelvas
Nanotechnology and Computational Chemistry Laboratory, Federal University of Technology—Paraná, Paraná- Av. João Miguel Caram, 731—Jardim Morumbi, Londrina 86036-700, Brazil
Daniel F. Valezi
Department of Physics and Mathematics, Institute of Chemistry, São Paulo State University UNESP, Rua Prof. Francisco Degni, 55—Quitandinha, Araraquara 14800-060, Brazil
Bruno L. S. Vicentin
Academic Department of Physics, Federal University of Technology—Paraná, Paraná-Rua Doutor Washington Subtil Chueire, 330, Ponta Grossa 84017-220, Brazil
Christian M. M. Rocha
Department of Energy, Universidad de la Costa CUC, Calle 58#55-66, Barranquilla 080003, Colombia
Eduardo Di Mauro
Department of Physics, State University of Londrina, Paraná- Rodovia Celso Garcia Cid, PR-445, Km 380, Londrina 86057-970, Brazil
Felipe de A. La Porta
Nanotechnology and Computational Chemistry Laboratory, Federal University of Technology—Paraná, Paraná- Av. João Miguel Caram, 731—Jardim Morumbi, Londrina 86036-700, Brazil
This study explores a sustainable approach to developing magnetic nanocomposites by synthesizing a mixed-phase iron oxide (IO) and recycled polyamide (RPA) composite from textile waste. The RPA/IO nanocomposite’s microstructural and magnetic properties were characterized using X-ray diffraction (XRD) with Rietveld refinement, scanning, transmission electron microscopy (SEM, TEM), and vibrating sample magnetometry (VSM). The proportions of the Fe3O4 and γ-Fe2O3 phases were found to be 23.2 wt% and 76.8 wt%, respectively. SEM and TEM showed a porous, agglomerated IO surface morphology with an average particle size of 14 nm. Magnetic analysis revealed ferrimagnetic and superparamagnetic behavior, with VSM showing saturation magnetization values of 21.81 emu g−1 at 5 K and 18.84 emu g−1 at 300 K. Anisotropy constants were estimated at 4.28 × 105 and 1.53 × 105, respectively, for IO and the composite, with a blocking temperature of approximately 178 K at 300 K. These results contribute to understanding the magnetic behavior of IO and their nanocomposites, which is crucial for their potential applications in emerging technologies.
