Abstract
Abstract Cylindrical-electrode-assisted solution blowing spinning (CSBS) is a novel nanofiber preparation method. The electric field of CSBS not only is one of the main innovations of this technology but also plays a key role in the preparation of nanofibers. In this article, the electric field of CSBS and the influences of electric field on the preparation of nanofibers were studied systematically for the first time by simulations, theoretical analyses, and experiments. This paper innovatively established the coaxial capacitor model for studying the CSBS electric field. The effects of electric field on the preparation and morphology of CSBS nanofibers were theoretically investigated by using this model. The theoretical formulas that can express the relationships between the various electric field variables were obtained. The electric field strength distribution, voltage distribution, and the relationships between the electric field parameters of CSBS were obtained by finite element simulations. The simulations’ results show that reducing the diameter of cylinder (DC) or increasing the voltage increase the electric field strength of the jet surface. Experimental results reveal that increasing voltage or reducing DC can reduce the diameter of nanofibers. The experimental and simulation results prove the correctness of the theoretical research conclusions. The theoretical and simulation conclusions of this paper lay a theoretical foundation for further study of CSBS electric field. The experimental conclusions can directly guide the controllable preparation of CSBS nanofibers.
Highlights
As a traditional nanofiber preparation method, solution blowing spinning (SBS) [1] has received special attention in the past decade due to its high productivity [1,2,3] and versatility
The coaxial cylindrical capacitor model was established by the principle of electrostatic induction and other related electrical knowledge, and this model was innovatively used to investigate the electric field of the cylindrical-electrode-assisted solution blowing spinning (CSBS)
The theoretical study concluded that increasing the voltage or decreasing the diameter of cylinder (DC) causes the charge density of the jet surface to increase, which leads to a decrease in the diameter of the nanofiber
Summary
As a traditional nanofiber preparation method, solution blowing spinning (SBS) [1] has received special attention in the past decade due to its high productivity [1,2,3] and versatility. Like many functional fibers [4], nanofibers fabricated by SBS have been widely used in filtration [5, 6], energy [7,8,9,10], and biomedical applications [11,12,13]. The SBS nanofibers have some inevitable defects, including larger diameter, bad continuity, and more slag balls [14, 15]. These defects hinder the applications of SBS. Since CSBS nanofibers are finer and more uniform than SBS nanofibers, this may make CSBS nanofiber webs more suitable for filtration and other applications than SBS ones [16]
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