Shear-electrospinning: extending the electrospinnability range of polymer solutions

LeCorre-Bordes, Deborah, Tucker, Nick, Huber, Tim , Buunk, Neil and Staiger, Mark P. (2016) Shear-electrospinning: extending the electrospinnability range of polymer solutions. Journal of Materials Science, 51 (14). pp. 6686-6696. ISSN 0022-2461

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Electrospinning is recognised as an easily implementable method for the production
of submicron-diameter polymer fibres. However, electrospinning is
problematic for polymers such as biologically derived materials because of their
higher viscosity. In this study, a new spinneret design applies shear forces to the
polymer solution just prior to electrospinning. The efficacy of shear-electrospinning
is proven using concentrated poly(vinyl alcohol) (PVOH) solutions as
a model, with solutions designed around the various concentration regimes of
PVOH, initially identified via rheological studies. Conventional electrospinning
of solutions up to 16.8 wt% PVOH and viscosity in the order of 101 Pa s leads to
the formation of ribbon-like fibres. In contrast, shear-electrospinning produces
fibres finer in diameter, rounder in cross-section and smoother. Finally, fibre
formation from solutions that are non-electrospinnable under conventional
electrospinning is shown for the first time to be achievable via shear-electrospinning
as demonstrated for a 30 wt% PVOH solution.

Keywords:Electrospinning, viscosity, spinnability, NotOAChecked
Subjects:H Engineering > H713 Production Processes
J Technologies > J410 Polymers Technology
Divisions:College of Science > School of Engineering
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ID Code:22972
Deposited On:28 Apr 2016 09:18

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