A new method for preparing needle-free cylindrical nozzle nanofibers

Abstract

Aiming at the traditional single-needle electrospinning technology, a novel system for the efficient production of multi-production nanofibers through electrospinning is reported. The polymer solution is delivered to the liquid tank, and when the applied voltage exceeds a certain value, a plurality of nozzles is formed. In this paper, the electric field distribution of pinhole cylindrical spinneret structure is studied by simulating the electric field intensity with finite element software. The diameter and yield of the nanofibers were investigated by varying the center electrode voltage and the annular collector radius. The results show that the diameter and productivity of nanofibers are affected by the electric field intensity around the spinneret. Increasing the applied voltage and collecting distance has some significant effect on the diameter of nanofibers. The diameter of nanofibers increases with the concentration of the solution. The maximum yield of nanofibers is 3.1 g/h. It is noteworthy that this method not only greatly improves productivity but also significantly reduces the influence of solvent evaporation during electrospinning. This spinning method provides support for large-scale production of nanofibers in the future. This will be conducive to the further development of electrospinning, increase production, and more accurate control.