Background: The patented bubble electrospinning, which is a simple and effective technique for mass-production of polymer nanofibers, has been studying extensively, but it is still under development. In the bubble electrospinning, multiple jets move from the positive electrode to the receptor, a long distance between the two electrodes is needed to guarantee complete solvent evaporation, as a result a relative high voltage is needed.

Objective: The aim of the present study is to use an auxiliary electrode and an auxiliary air flow to improve bubble electrospinning with lower voltage and higher output than those by its traditional one.

Methods: The modification of the bubble electrospinning with an auxiliary electrode and an auxiliary airflow is used to fabricate nanofibers. The auxiliary electrode is close to the positive electrode. The experiment was carried out at room temperature with 8%PVA solution. The result was analyzed with a S4800 cold field scanning electron microscope (SEM, Hitachi S-4800, Tokyo, Japan).

Results: The auxiliary electrode can generate a strong induced electric field force. With the action of airflow, the jets will fly to the receptor instead of the auxiliary electrode.

Conclusion: Both auxiliary electrode and auxiliary airflow are two important factors affecting the spinning process. It can reduce the spinning voltage and improve spinning efficiency.

背景：获得专利的气泡静电纺丝技术是一种用于批量生产聚合物纳米纤维的简单有效的技术，目前已经得到了广泛的研究，但仍在开发中。在气泡静电纺丝中，多个喷嘴从正极移动到接收器，两个电极之间需要较长的距离以确保溶剂完全蒸发，结果需要相对较高的电压。

目的：本研究的目的是使用一种辅助电极和一种辅助气流来改善气泡静电纺丝，其电压和输出功率要高于传统电极。

方法：利用辅助电极和辅助气流对气泡静电纺丝进行改性，以制备纳米纤维。辅助电极靠近正极。实验在室温下用8％PVA溶液进行。用S4800冷场扫描电子显微镜（SEM，日立S-4800，日本东京）分析结果。

结果：辅助电极可以产生很强的感应电场力。在气流的作用下，射流将飞向接收器，而不是辅助电极。

结论：辅助电极和辅助气流都是影响纺丝过程的两个重要因素。可以降低纺丝电压，提高纺丝效率。