Novel free surface electrospinning for preparing nanofibers and its mechanism study

Abstract

In order to meet the increasing demand for nanofibers and overcome the disadvantages of traditional electrospinning technology, it is necessary to research an electrospinning device that can produce nanofibers efficiently. In this paper, a free surface electrospinning device was improved, and a spherical section free surface electrospinning device was developed to prepare high-quality polyacrylo-nitrile nanofibers in batches. Meanwhile, MAXWELL 3-D software was used to simulate the electric field distribution of the spherical section free surface electro-spinning with solution reservoirs of different spherical radii. The influence of the spherical radius on the spinning effect was analyzed to study the spinning mechanism. The results showed that when the applied voltage was 40 kV, the electric field distribution of the spherical section free surface electrospinning with a larger spherical radius was more uniform, the nanofiber diameter was larger, the nanofiber diameter distribution was more uniform, and the yield of nanofibers was higher. When the spherical radius was 75 mm, the quality of nanofibers was better, and the yield could reach the maximum value of 14.35 g per hour, due to its higher average electric field intensity and uniform electric field distribution.