Exploratory study of sawtooth-guidance type melting differential electrospinning

Sawtooth-guidance type needleless melt electrospinning has been proposed as a way to improve the non-uniformity of melt electrospinning fibers. The new method was first compared with conventional melt electrospinning without sawtooth-guidance. The optimum spinning process parameters for sawtooth-guidance type needleless melt electrospinning were then determined by orthogonal experiments on self-regulating equipment. The experiments demonstrated that sawtooth-guidance type needleless melt electrospinning improves the uniformity of fiber diameter and the most appropriate spinning process parameters are as follows: a spinning temperature of 240℃, a pressure of 65 kV and a distance of 105 mm, with the mass flow rate as a constant. Moreover, Taylor-cones are distributed at the sawtooth tips, and the average minimum fiber diameter was 820 nm.