An onset of beadless character of electrospun poly(vinylidene fluoride-co-hexafluoropropylene) nanofibres

0558301 - ÚH 2024 RIV PT eng C - Konferenční příspěvek (zahraniční konf.)
Filip, Petr - Peer, Petra - Zelenková, Jana
An onset of beadless character of electrospun poly(vinylidene fluoride-co-hexafluoropropylene) nanofibres.
Proceedings M2D2022. Porto: Instituto de Ciencia e Inovacao em Engenharia Mecanica e Engenharia Industrial - INEGI, 2022 - (Silva Gomes, J.; Meguid, S.), s. 337-338. ISBN 978-989-54756-3-6.
[International conference on Mechanics and Materials Design /9./. Funchal (PT), 26.06.2022-30.06.2022]
Grant CEP: GA MŠMT(CZ) LTC19034
Institucionální podpora: RVO:67985874
Klíčová slova: electrospinning * polymer solution * PVDF-co-HFP * viscoelasticity
Obor OECD: Nano-materials (production and properties)
https://paginas.fe.up.pt/~m2d/proceedings_m2d2022/index.htm

Electrospun nanofibrous mats made of poly(vinylidene fluoride-co-hexafluoropropylene) material proved to be very efficient especially in membrane distillation and separators in batteries. The question is for which polymer concentration (DMF as a solvent) the appearance of singularities (beads along the individual nanofibers) becomes suppressed and smooth (beadless) nanofibres appear. It was shown that this concentration closely correlates with an onset of viscoelasticity, in other words with an apparent decrease of a phase angle. Hence, for a determination of this turning concentration time and material consuming electrospinning experiments can be substituted by an inexpensive oscillatory rheological test.
Trvalý link: https://hdl.handle.net/11104/0332653