Five-needle Electrospinning Device With An Auxiliary Electrode
Kim et al. designed a five-needle electrospinning device with an auxiliary electrode (Fig. 6.5) and compared its spinning process to a five-needle electrospinning process without an auxiliary electrode. It was found that the initial jet and the entire electrospinning process were more stable when an auxiliary electrode was added. The mutual electric field interference between the jets was obviously reduced and the diameter and yield of the nanofibers both increased. In addition, Kim et al. also studied an electrospinning process that utilized different numbers of needles with auxiliary electrodes and found that the nanofiber deposition weight of each needle was similar to that of singleneedle electrospinning under the same spinning conditions. Therefore, the nanofiber yield increases linearly with the increase in the number of needles when an auxiliary electrode is added to the electrospinning system.