Journal of Industrial and Engineering Chemistry, Vol.15, No.3, 430-433, May, 2009
Effects of gamma irradiation on the thermal and mechanical properties of chitosan/PVA nanofibrous mats
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Chitosan/poly(vinyl alcohol) (PVA) nanofibrousmats were prepared by the electrospinning method. The morphology and structure of electrospun nanofibers were investigated by scanning electron microscopy (SEM) and Fourier transform infrared (FT-IR) spectroscopy. SEM images showed that the uniform and bead-free fibers were obtained at concentrations greater than 8 wt%. Chitosan/PVAmats were irradiated with different doses (50-200 kGy) of 60Co gamma rays. The effect of irradiation dose on the mechanical and thermal properties of these films was also investigated. Increasing the irradiation dose led to a decrease in tensile strength. FT-IR and DSC demonstrated that there were strong intermolecular hydrogen bonds between the chitosan and PVA molecules.
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