Fabrication and characterization of Fe3O4/PVP magnetic nanofibers via gas-solid reaction method

In order to obtain uniform dispersion of Fe3O4 in composite nanofibers, a new method is used by mixing compound of Fe3+ and Fe2+ with organic polymer polyvinylpyrrolidone (PVP), then subjected nanofibers through electrospinning and formed ferric oxide/polyvinylpyrrolidone (Fe3O4/PVP) fibers via in-situ by gas-solid reaction under the condition of NH3. The morphology of the fibers and the dispersion of Fe3O4 particles in the fibers were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The crystallization of the magnetic fibers was characterized by X-ray diffraction (XRD). The vibrating sample magnetometer (VSM) was used to observe the superparamagnetic behavior. The morphology charaterization show Fe3O4 particles in the nanofibers were evenly distributed with no obvious particle agglomeration. The magnetic measurement of the fiber shows that the magnetic nanofibers have better superparamagnetism, which are expected to be used as a drug-loaded magnetic cloth in the field of biomedicine.