Magnetic composite nanofibers fabricated by electrospinning of Fe_3O_4/gelatin aqueous solutions

摘要

We have fabricated magnetic composite nanofibers containing superparamagnetic Fe_3O_4 nanoparti-cles by the electrospinning method. Highly dispersed Fe_3O_4 magnetic nanoparticles were synthesized by one-step co-precipitation of Fe~(2+)/Fe~(3+) under an alkaline condition with 4wt% poly(vinyl alcohol) (PVA) aqueous solution as the stabilizer. Gelatin (GE) was used as a polymeric matrix for fabricating the nanocomposites. The prepared Fe_3O_4/GE composite nanofibers were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD), respectively. These composite nanofibers show uniform and continuous morphology with the Fe_3O_4 nanoparticles embedded in the nanofibers. By studying the magnetic properties of the Fe_3O_4/GE composite nanofibers, we confirm that the composite nanofibers possess superparamagnetic properties with a high saturated magnetization (M_s= 12.87emμ g~(-1)) at room temperature. The features of this approach for getting one-dimensional magnetic nanostructure are its simplicity, effectiveness and safety. The Fe_3O_4/GE nanofibers with superparamagnetic properties would be potentially applied in biomedical field.