Abstract
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.
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