One of the critical parameters impacting the fiber’s properties is the applied voltage. A wide range of research have been converged on the importance of the polarity effect on the formation of homogenous fibers [[1]]. Most of the electrospinning process deployed the positive voltage, lately the integration of the negative voltage also has been explored to enhance surface charge. The impact of the proposed negative voltage power supply offers a surface potential with high performance and more homogenously converged flow to the collector surface.
The principle of the proposed negative power supply in a solution electrospinning setup with a positively charged nozzle and indirectly negative grounded collector is to generate a larger electrical current and enough strong electric field force to the jet. Also, to minimize risk of damage, the negative charge can be an optimum option and easily integrated to the setup, leading to improvement of the jet quality and the nanofiber/ nanoparticles properties.
While using a negatively charged collector, the formed jet carries positive charges and moves homogenously with the electrical field and gravitational forces in the same uniform direction with a high covered surfaces tightly packed and well distributed [2].
References
[1] C. Gotti, M. Torsello, R. Onesti, G. Tanganelli, A. Sensini, C. Boi, D. Fabiani, M. L. Focarete, A. Zucchelli, Negative Voltage Electrospinning for the Production of Highly Efficient PVDF Filters. Macromol. Mater. Eng. 2024, 2300442. https://doi.org/10.1002/mame.202300442
[2] Ostheller, M.-E.; Balakrishnan, N.K.; Groten, R.; Seide, G. The Effect of Electrical Polarity on the Diameter of Biobased Polybutylene Succinate Fibers during Melt Electrospinning. Polymers 2022, 14, 2865. https://doi.org/10.3390/polym14142865
