Cylindrical-electrode-assisted solution blowing spinning (CSBS) is a novel technique of fabricating nanofibers. In this paper, a combination of numerical simulation, theoretical analysis, and experiment is used to study the influences of CSBS airflow field and electric field on the fabrication of CSBS nanofibers for the first time. The effects of air pressure and injection speed on the morphology of CSBS fiber are studied. The research results show that the increase in air pressure will increase the centerline velocity and the centerline turbulence intensity within the effective stretching distance of the airflow. The increase in centerline velocity will result in a decrease in the diameter of CSBS fibers. There is a negative correlation between jet diameter and surface charge density of CSBS jet. The increase in air pressure will increase the stretching of the jet by the air flow, which will make the jet more likely to become thinner again because of the charge repulsion. Increasing air pressure will reduce the porosity of the nonwoven. As the injection speed increases, the diameter of CSBS fiber increases, and the porosity of the nonwoven decreases first and then increases. This work provides theoretical and experimental bases for the controllable preparation of CSBS nanofibers.

中文翻译：

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圆柱电极辅助溶液吹制纺丝纳米纤维的理论和实验研究

圆柱电极辅助溶液吹纺（CSBS）是一种制造纳米纤维的新技术。本文将数值模拟，理论分析和实验相结合，首次研究了CSBS气流场和电场对CSBS纳米纤维制备的影响。研究了气压和注入速度对CSBS纤维形态的影响。研究结果表明，气压的增加将在气流的有效拉伸距离内增加中心线速度和中心线湍流强度。中心线速度的增加将导致CSBS纤维直径的减小。CSBS射流的射流直径与表面电荷密度之间存在负相关关系。气压的增加将增加气流对射流的拉伸，这将使射流由于电荷排斥而再次变得更薄。空气压力的增加将降低非织造材料的孔隙率。随着注射速度的增加，CSBS纤维的直径增加，非织造材料的孔隙率先减小然后增大。这项工作为可控制备CSBS纳米纤维提供了理论和实验基础。