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Solution Blow Spinning of High-Performance Submicron Polyvinylidene Fluoride Fibres: Computational Fluid Mechanics Modelling and Experimental Results

Atif, Rasheed; Combrinck, Madeleine; Khaliq, Jibran; Hassanin, Ahmed H.; Shehata, Nader; Elnabawy, Eman; Shyha, Islam

Authors

Rasheed Atif

Madeleine Combrinck

Jibran Khaliq

Ahmed H. Hassanin

Nader Shehata



Abstract

Computational fluid dynamics (CFD) was used to investigate characteristics of high-speed air as it is expelled from a solution blow spinning (SBS) nozzle using a k-ε turbulence model. Air velocity, pressure, temperature, turbulent kinetic energy and density contours were generated and analysed in order to achieve an optimal attenuation force for fibre production. A bespoke convergent nozzle was used to produce polyvinylidene fluoride (PVDF) fibres at air pressures between 1 and 5 bar. The nozzle comprised of four parts: a polymer solution syringe holder, an air inlet, an air chamber, and a cap that covers the air chamber. A custom-built SBS setup was used to produce PVDF submicron fibres which were consequently analysed using scanning electron microscope (SEM) for their morphological features. Both theoretical and experimental observations showed that a higher air pressure (4 bar) is more suitable to achieve thin fibres of PVDF. However, fibre diameter increased at 5 bar and intertwined ropes of fibres were also observed.

Journal Article Type Article
Acceptance Date May 8, 2020
Online Publication Date May 16, 2020
Publication Date May 16, 2020
Deposit Date Oct 2, 2020
Publicly Available Date Oct 2, 2020
Journal Polymers
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 12
Issue 5
Article Number 1140
DOI https://doi.org/10.3390/polym12051140
Keywords CFD; SBS; nozzle; PVDF; fibres
Public URL http://researchrepository.napier.ac.uk/Output/2686001

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Solution Blow Spinning Of High-Performance Submicron Polyvinylidene Fluoride Fibres: Computational Fluid Mechanics Modelling And Experimental Results (11.7 Mb)
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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.





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