An Estimate of the onset of beadless character of electrospun nanofibres using rheological characterization

0537356 - ÚH 2022 RIV CH eng J - Journal Article
Peer, Petra - Zelenková, Jana - Filip, Petr - Lovecká, L.
An Estimate of the onset of beadless character of electrospun nanofibres using rheological characterization.
Polymers. Roč. 13, č. 2 (2021), č. článku 265. E-ISSN 2073-4360
R&D Projects: GA MŠMT(CZ) LTC19034
Institutional support: RVO:67985874
Keywords : electrospinning * PVF-co-HFP * PVB * PEO * viscoelasticity * specific viscosity
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 4.967, year: 2021
Method of publishing: Open access
https://www.mdpi.com/2073-4360/13/2/265

Electrospinning represents the very effective process of producing nanofibrous mats. This process is influenced by a number of mutually and strongly interlaced entry parameters (characteristics of polymer, solvent, process parameters) and their participation in the resulting nanofiber quality. The appearance of nanofibers is a result of the necessary primary experimental parameter setting within an acceptable range. However, finer analysis of nanofiber quality depends on the proper choice of these individual factors. The aim of this contribution is to evaluate one of the key factors—polymer concentration—with respect to the presence or absence of bead formation. This passage can be approximated by rheological oscillatory measurements when a sudden decrease in phase angle indicates this change. It replaces otherwise time- and cost-consuming trial-and-error experiments. This approach was tested using three different materials: solutions of poly(vinylidene fluoride-co-hexafluoropropylene), poly(vinyl butyral), and poly(ethylene oxide).
Permanent Link: http://hdl.handle.net/11104/0315450