Highly efficient transparent air filter prepared by collecting-electrode-free bipolar electrospinning apparatus

Electrospinning technology has been used for a long time. A jet from a needle was formed by applying high voltage, and then the nanofibers are deposited onto a collecting electrode (usually metal) and the excess charge is conducted away to complete the electrospinning. Alternatively, it is also possible to prevent charge accumulation from hindering the progress of electrospinning by means of charge neutralization. A bipolar electrospinning technique (B-EEM) was developed to induce jets with different charges through a set of high-voltage power supplies of opposite polarity, and the two jets neutralize each other on the insulating mesh, thus completing the electrospinning process. There is no need for a collecting electrode to complete the electrospinning process. We have found that the filters produced by the new technology have better filtration efficiency while maintaining the same transparency in relative to the original technology, and this optimization is due to the distribution modification of the nanofibers on the mesh.

静电纺丝技术已经使用了很长时间。通过施加高压，从针头形成喷射流，然后将纳米纤维沉积到收集电极（通常是金属）上，并带走多余的电荷以完成静电纺丝。或者，也可以通过电荷中和防止电荷积聚阻碍静电纺丝的进行。开发了一种双极电纺技术（B-EEM），以通过一组相反极性的高压电源感应出具有不同电荷的射流，并且这两个射流在绝缘网上相互抵消，从而完成了电纺过程。不需要收集电极来完成静电纺丝过程。我们已经发现，通过新技术生产的过滤器具有更高的过滤效率，同时相对于原始技术仍保持相同的透明度，并且这种优化是由于纳米纤维在网格上的分布变化所致。

Published: 2020

Journal ：JOURNAL OF HAZARDOUS MATERIALS

Impact Factor：952

Paper link: https://www.sciencedirect.com/science/article/abs/pii/S030438941931489X