Controllable fabrication of high-quality magnetic nanofiber membranes using variable magnetic field-assisted electrospinning technology

Abstract

This study introduces an innovative method for fabricating high-quality magnetic nanofiber membranes using controllable magnetic field-assisted electrospinning technology. By integrating electromagnetic lens technology, precise modulation of the magnetic field is achieved through current adjustments, effectively focusing charged particles during the electrospinning process. Furthermore, the interaction with magnetic nanoparticles enhances control over the nanofiber structure. Notably, the magnetic field generated by the electromagnetic lens adjusts the crystalline structure of PAN, resulting in a 19.2 % reduction in average fiber diameter, a 60.2 % decrease in deposited circular area, and a 50.8 % increase in average thickness. Additionally, significant improvements in magnetic properties are achieved, with a 56.5 % increase in saturated magnetization and a 200 % increase in coercivity. The crystalline and mechanical properties of the composites are also enhanced, indicating the great potential of this method for precise and controllable fabrication of magnetic nanofibers. This novel technology opens up new avenues for applications in sensors, filtration, and biomedical engineering.