Abstract:

The melt differential electrospinning process and device combining swirl air intake assisting with roll collection was put forward to prepare melt electrospun nanodibers and oriented nanowires. By changing the process parameters, the diameter of the fibers and the orientation of the final nanowires can be effectively controlled. The average diameter and orientation of the fibers were observed and measured by SEM and the degree of crystalinity of the oriented nanowires was measured by XRD. The experiment shows when the speed of swirl air intake is getting larger, the deameter of the fiber become smaller. When the speed of swirl air intake is 20 m/s, the average diameter of fiber can be up to 500nm. When the speed of swirl air intake is close to the rotating line speed, the orientation of fiber is exceedingly good. When the rotating line speed is close to 20m/s, the nanowire orientation is the best. Dozens of fibers prepared by single nozzle gathered into wires  and the crystallinity of the nanowire was the highest.

Key words: melt electrospinnning, orientation, nanowire, swirl air intake, crystallinity