Preparation and characterization of Fe_3O_4/chitosan/poly(vinyl pyrrolidone) composite nanofibers

Composite nanofibers were fabricated by coaxial electrospinning,using chitosan/poly(vinyl pyrrolidone)(CS/PVP) as the shell and Fe3O4/PVP as the core.The morphology,chemical composition and magnetic characteristics of the composite nanofibers were characterized by SEM,FT-IR,XRD and VSM.Experimental results indicated that the composite nanofibers had a uniform structure,smooth surface,and a diameter of 350-800 nm,with crystalline Fe3O4 distributed in nanofibers.The composite nanofibers have superparamagnetism and hence are expected to become an excellent composite material for biomedicine field.