Upward needleless electrospinning of multiple nanofibers

A new approach to electrospinning of polymer nanofibers is proposed. A two-layer system, with the lower layer being a ferromagnetic suspension and the upper layer a polymer solution, is subject to a normal magnetic field provided by a permanent magnet or a coil. As a result, steady vertical spikes o...

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Bibliographic Details
Published in:Polymer (Guilford) 2004-04, Vol.45 (9), p.2977-2980
Main Authors: Yarin, A.L., Zussman, E.
Format: Article
Language:English
Subjects:
Applied sciences
Electrospinning
Exact sciences and technology
Machinery and processing
Nanofibers
Plastics
Polymer
Polymer industry, paints, wood
Spinning
Technology of polymers
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Summary:A new approach to electrospinning of polymer nanofibers is proposed. A two-layer system, with the lower layer being a ferromagnetic suspension and the upper layer a polymer solution, is subject to a normal magnetic field provided by a permanent magnet or a coil. As a result, steady vertical spikes of magnetic suspension perturbed the interlayer interface, as well as the free surface of the uppermost polymer layer. When a normal electric field is applied in addition to the system, the perturbations of the free surface become sites of jetting directed upward. Multiple electrified jets undergo strong stretching by the electric field and bending instability, solvent evaporates and solidified nanofibers deposit on the upper counter-electrode, as in an ordinary electrospinning process. However, the production rate is shown to be higher.
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2004.02.066