Preparation of Chitosan/Poly (vinyl alcohol) Blends Nanofibrous Matrix

摘要

An electrospinning method was used to fabricate chitosan(CS)/ poly(vinyl alcohol) (PVA) blends nanofibrous matrix. The influences of various processing parameters on diameter and morphology of the electrospun nanofibers were investigated by scanning electron microscopy (SEM) technique. The properties of solution with different weight ratio, such as conductivity and viscosity, were measured. The results indicated that the average diameter of the fibers increased with increasing of the concentration and the morphology changed gradually from more beads structure to the uniform fiber-structure with increasing of the concentration of solution from3wt% to 9.5wt%.The diameter of the electrospun fibers decreased with the increasing of CS contents in the blend from 10% to 30%. However, at the blend compositions with above 30% CS, the blend nanofibers were not able to electrospun into the fibrous structure. Higher voltage and larger TCD (tip-to-collector distance) favored the formation of smaller diameter of the electrospun fibers. The Fourier transform infrared (FT-IR) analysis demonstrated that there were strong interactions between CS and PVA molecular resulted from intermolecular hydrogen bonds.