Abstract:

Based on bubble electrospinning, a modified electrospinning technique using a funnel shaped air nozzle was presented to aolve the low production efficiency, difficulty in the control of the spinning process and the clogging of needles of convenitional electrospinning and realize the efficient peoduction of high-quality nanofibers. Polyvinyl pyrrolidone (PVP-K30) solution was used as the spinning solution, and high-quality PVP nanofiber membranes were successfully prepared by the funneling air-jet electrospinning technique. The effects of spinning parameters (such as mass fraction of solution, mass fraction of surfactant and applied voltage) on the morphology and quality of nanofiber were investigated by the control variable method. The results show that the PVP nanofibers were obtained under the conditions of the PVP solution mass fraction was 32％, the applied voltage of 60 kV and the surfactant mass fraction of  0.1% have the best comprehensive puality, fine surface morphology , low diameter and uniform diameter distribution.

Key words: funneling air-jet-electrospinning technique, nanlfibrous membrane, polyvinyl pyrrolidone