Ultrafine fibers of chitosan/poly(vinyl alcohol) (CS/PVA) were prepared by electrostatic spinning.The effects of solution concentration

mass ratio of CS/PVA and internal diameter of syringe needle on the morphology of ultrafine fibers were investigated by scanning electron microscope (SEM).Furthermore

photocurable monomer triethylene glycol dimethylacrylate (TEGDMA)and photoinitiator 2-hydroxy-2-methyl-1-phenylpropan-1-one were introduced into the CS/PVA blend solution to increase the water-resistance of the fibers

which is a common shortcoming of water soluble polymer fiber.The SEM results showed that

after UV radiation

the water-resistance of fibers was obviously improved by intrafiber-photocrosslinking when the CS/PVA weight ratios is 8∶2 and the concentration of TEGDMA and photoinitiator are 4 wt% and 0.12 wt%

respectively.The average diameter of fibers obtained by this method is around 200 nm.