Wu Yu-Ke, Li Zong-Jie, Fan Jie, Xia Zhao-Peng, Liu Yong
National Joint Engineering Research Center of High Performance Fibers and Textile Composites, Tianjin Polytechnic University, Tianjin 300387, China.
School of Textiles, Tianjin Polytechnic University, Tianjin 300387, China.
Nanomaterials (Basel). 2018 Sep 28;8(10):768. doi: 10.3390/nano8100768.
An auxiliary electrode introduced in traditional spinneret electrospinning is an effective and powerful technique to improve the production rate of nanofibers. In this work, the effects of the arrangement of auxiliary electrode, applied voltage, injection speed, and the distance between the electrode tip and the spinneret tip (ESD) on the jet number and the morphology of polyvinyl alcohol (PVA) nanofibers were investigated systematically. The results showed that the number of jets firstly increased and then decreased with the increase of applied voltage and ESD, respectively, while increasing with the injection speed in both the auxiliary electrode in the vertical position and parallel position. The average nanofiber diameter decreased with increasing of applied voltage and injection speed, but decreasing in ESD in these two positions. The numerical simulation results revealed that the auxiliary electrode primarily influenced the electric field intensity in the spinning area. This work provides a deep understanding of multiple jets in electrospinning.
在传统的喷丝头静电纺丝中引入辅助电极是提高纳米纤维生产率的一种有效且强大的技术。在这项工作中，系统地研究了辅助电极的布置、施加电压、注射速度以及电极尖端与喷丝头尖端之间的距离（ESD）对聚乙烯醇（PVA）纳米纤维的射流数量和形态的影响。结果表明，射流数量分别随着施加电压和ESD的增加先增加后减少，而在辅助电极处于垂直位置和平行位置时，均随着注射速度的增加而增加。平均纳米纤维直径随着施加电压和注射速度的增加而减小，但在这两个位置中均随着ESD的增加而减小。数值模拟结果表明，辅助电极主要影响纺丝区域的电场强度。这项工作为深入理解静电纺丝中的多股射流提供了依据。
