ABSTRACT
The fiber collection in needleless electrospinning can generally be classified into three types: grounded plate, rotating drum, and moving substrate. The plate collector is normally used for electrospinning at a moderate production rate, e.g., multi-jet electrospinning and wire coil electrospinning. However, these fiber collectors are not suitable for upward needleless electrospinning systems, because the deposition of numerous nanofibers accumulates a large amount of charge on the collector, which can disturb or even stop the electrospinning process if they do not dissipate quickly. Moving collectors are therefore necessary in these systems. There are two types of moving collectors: rotating drum collector and moving substrate. The drum collector was used by Niu et al. [425]. Drum collector can also collect aligned nanofiber mat. When the mat reaches a certain thickness, it can be peeled off the collector. Jirsak et al. [435] used a moving substrate to collect nanofibers in their systems. The advantage of this type of fiber collection is that nanofibers can be collected continuously and the nanofiber web does not have to be very strong; such a collection system also allows the incorporation of nanofibers into the fiber collecting substrate itself, if required.
