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

Abstract

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.