Continuous needleless electrospinning of magnetic nanofibers from magnetization-induced self-assembling PVA/ferrofluid cone array

Hongjian Wang, Bin Liu, Weilong Huang, Zi Lin, Jie Luo, Yan Li, Lin Zhuang, Wei Wang, Lelun Jiang*

Journal of Magnetism and Magnetic Materials Volume 452, 15 April 2018, Pages 1-4

原文链接：https://doi.org/10.1016/j.jmmm.2017.12.035

Abstract

A novel approach, continuous needleless electrospinning from the tips of magnetization-induced self-assembling PVA/ferrofluid cone array, was proposed to prepare magnetic nanofibers. A PVA/ferrofluid was synthesized, the needleless electrospinning process was observed, and the morphology and magnetic properties of magnetic nanofibers were investigated. The results showed that the PVA/ferrofluid could remain stable and homogeneous for 21 days under the magnetic field gradient (2.2 mT/mm). “Taylor cone” array of PVA/ferrofluid was self-assembled under both the magnetic and electric fields. As the electric voltage reached 25 kV, the jets were emitted from the “Taylor cone” array, resulting in needleless electrospinning of magnetic nanofibers. Magnetic nanofibers were homogeneous and continuous with an average diameter of 73.6 nm. Magnetic nanofibers showed a good magnetic response property and relatively high saturated magnetization (1.71 emu/g), which is expected to be applied in the biomedical field.

Keywords: Nanocomposites; Magnetic nanofibers; Needleless electrospinning; Self-assembling; Nanoparticles; Ferrofluid