Preparation and characterization of polysulfone amide nanoyarns by the dynamic rotating electrospinning method

Abstract

In this study, a novel electrospinning method and the related spinning device were developed to fabricate a new type of polysulfone amide yarn assembled with nanoscale fiber. The electrospun nanofibers extruded and stretched under the electric field force were assembled and twisted with a rotating receiver, so the freshly prepared nanofibers could be bundled into yarns continuously. The effects of solid concentration and the rotating speed of the collector on the yarn structures and properties were investigated systematically. The three-dimensional electric field was modeled and calculated theoretically to simulate the electric field distribution of the electrospinning system. The experimental results showed that the morphology, mechanical strength, and thermal and wicking properties were obviously affected by solid concentration and the rotating speed of the collector. It was found that the nanoyarn could achieve a better performance in morphology, strength, heat resistance, moisture absorption at 12 wt% and 40 r/min collector rotating speed. Therefore, the proposed advanced electrospinning technique in this paper could be used to produce multi-functional nanoyarns, which may be useful for the application of nanoyarns in various industrial fields.