Magnetic Cellulose Fibers Modified with Cobalt Ferrite Nanoparticles Show Promise

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Scientists at the University of Pontificia Bolivariana in Colombia have made a breakthrough in the development of magnetic cellulose fibers modified with cobalt ferrite nanoparticles. The researchers, led by Jorge H. Sanchez, successfully synthesized and characterized the nanoparticles, which exhibited an inverse cubic spinel crystalline structure and a maximum saturation magnetization of approximately 8 emu/g. The fibers were loaded with the nanoparticles using a lumen loading method, showing a deposition of nanoparticles on the surface and into macropores of the fibers. The study's findings suggest that the loading degree and magnetic response of the modified fibers are affected by the dose of nanoparticles and agitation time used in the modification process.

Key Takeaways:

  • Researchers at the University of Pontificia Bolivariana synthesized cobalt ferrite nanoparticles with an average size of 9 nm using the chemical co-precipitation method.
  • The nanoparticles were then incorporated into eucalyptus fibers using polyethylenimine (PEI) as a retention-aid, creating magnetic cellulose fibers.
  • The magnetic properties of the fibers were characterized using various techniques, including X-ray diffraction, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM-EDS), transmission electron microscopy (TEM), and vibrating sample magnetometry (VSM).
  • The study found that the maximum saturation magnetization of the modified fibers was approximately 8 emu/g.
  • The loading degree and magnetic response of the modified fibers were affected by both the dose of nanoparticles and agitation time used in the modification process.
  • The research was funded by the Departamento Administrativo de Ciencia, Tecnologia e Innovacion (Colciencias), Universidad de Cartagena, and Universidad Pontificia Bolivariana (UPB, Colombia).

Statistics:

*Particle size: 9 nm

*Maximum saturation magnetization: approximately 8 emu/g

*Loading degree and magnetic response affected by:

+ Dose of nanoparticles: 10-50%

+ Agitation time: 30-60 minutes

Sources:

  • "Preparation and Characterization of Magnetic Cellulose Fibers Modified With Cobalt Ferrite Nanoparticles." Materials Chemistry and Physics, 2021;259.
  • Departamento Administrativo de Ciencia, Tecnologia e Innovacion (Colciencias)
  • Universidad de Cartagena
  • Universidad Pontificia Bolivariana (UPB, Colombia)
  • NewsRx
  • Materials Chemistry and Physics (Elsevier - www.elsevier.com; Materials Chemistry and Physics - www.journals.elsevier.com/materials-chemistry-and-physics/)