A study of rheological limitations in rotary jet spinning of polymer nanofibers through modeling and experimentation

ABSTRACT The recently popularized method of rotary jet spinning (RJS) or centrifugal spinning is investigated to evaluate the rheological limitations of polymer solutions and melts to optimal spinnability. The influence of Newtonian or non‐Newtonian behavior of the polymer on spinnability is discuss...

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Bibliographic Details
Published in:Journal of applied polymer science 2020-09, Vol.137 (33), p.n/a
Main Authors: Rogalski, James J., Botto, Lorenzo, Bastiaansen, Cees W. M., Peijs, Ton
Format: Article
Language:English
Subjects:
Computational fluid dynamics
Computer simulation
Diameters
electrospinning
Experimentation
fibers
Materials science
Melts
Nanofibers
Polymer melts
Polymers
Process parameters
Rheological properties
Rheology
theory and modeling
thermoplastics
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Summary:ABSTRACT The recently popularized method of rotary jet spinning (RJS) or centrifugal spinning is investigated to evaluate the rheological limitations of polymer solutions and melts to optimal spinnability. The influence of Newtonian or non‐Newtonian behavior of the polymer on spinnability is discussed. We observe that highly viscous polymers tend to block the die channels within a rotary jet spinneret and therefore suggest the use of relatively low Newtonian viscosities of between 1 and 10 Pa s for optimal fiber production. Computational fluid dynamics simulations are used in conjunction with experimental data to establish important processing parameters, such as typical shear rates in the device and optimal polymer melt or solution viscosities. A theoretical model for RJS is compared to measured fiber diameters. The comparison shows that although fiber diameters can be estimated very roughly in the case of polymer solutions, the prediction of fiber diameter in the case of polymer melts require further modeling work. © 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48963.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.48963