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Related Experiment Video

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Electrospinning Nanofiber Mats with Magnetite Nanoparticles Using Various Needle-Based Techniques.

Al Mamun1, Lilia Sabantina1, Michaela Klöcker2

  • 1Junior Research Group "Nanomaterials", Faculty of Engineering and Mathematics, Bielefeld University of Applied Sciences, 33619 Bielefeld, Germany.

Polymers
|February 15, 2022
PubMed
Summary

Electrospinning magnetic nanofiber mats with 50 wt% magnetite nanoparticles is challenging. This study produced regular, freestanding poly(acrylonitrile) composite mats with improved morphology and nanoparticle distribution.

Keywords:
atomic force microscopy (AFM)coaxial spinningdynamic mechanical analysis (DMA)freestanding nanofiber matsmagnetic nanoparticlesneedle-based electrospinningscanning electron microscopy (SEM)

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Polymer Science

Background:

  • Electrospinning produces nanofiber mats with nanoparticles for applications like hyperthermia.
  • Increasing nanoparticle content often degrades morphology and mechanical properties, hindering freestanding mat production.

Purpose of the Study:

  • To investigate the production of poly(acrylonitrile) (PAN) composite nanofiber mats with a high content (50 wt%) of magnetite nanoparticles.
  • To evaluate the effect of nanoparticle loading and collection method on fiber morphology and mechanical properties.

Main Methods:

  • Needle-based electrospinning of PAN and magnetite (Fe3O4) nanoparticles.
  • Collection on flat and rotating collectors to influence morphology.
  • Characterization using Scanning Electron Microscopy (SEM), Atomic Force Microscopy (AFM), Energy Dispersive X-ray Spectroscopy (EDS), and Dynamic Mechanical Analysis (DMA).

Main Results:

  • Rotating collectors produced regular, bead-free PAN-magnetite nanofiber mats, unlike those from flat collectors.
  • Core-shell fiber structures showed slightly increased diameters with some agglomerations.
  • EDS confirmed a regular distribution of magnetite nanoparticles.
  • DMA indicated reduced mechanical properties compared to lower nanoparticle content mats, but 50 wt% magnetite mats remained freestanding.

Conclusions:

  • Electrospinning with a rotating collector enables the production of regular, freestanding PAN-magnetite nanofiber mats with 50 wt% nanoparticles.
  • Despite reduced mechanical properties, the high nanoparticle content mats maintain structural integrity, opening possibilities for advanced magnetic applications.