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Open AccessArticle

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

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Department of Mechanical and Construction Engineering, Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne NE1 8ST, UK
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Centre of Smart Nanotechnology and Photonics (CSNP), SmartCI Research Center, Alexandria University, Alexandria 21544, Egypt
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Department of Textile Engineering, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt
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Department of Engineering Mathematics and Physics, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt
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USTAR Bioinnovations Centre, Faculty of Science, Utah State University, Logan, UT 84341, USA
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Kuwait College of Science and Technology (KCST), Doha District 13133, Kuwait
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(5), 1140; https://doi.org/10.3390/polym12051140
Received: 15 April 2020 / Revised: 7 May 2020 / Accepted: 8 May 2020 / Published: 16 May 2020
(This article belongs to the Special Issue Finite Element Methods in Smart Materials and Polymers)
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. View Full-Text
Keywords: CFD; SBS; nozzle; PVDF; fibres CFD; SBS; nozzle; PVDF; fibres
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MDPI and ACS Style

Atif, R.; Combrinck, M.; Khaliq, J.; Hassanin, A.H.; Shehata, N.; Elnabawy, E.; Shyha, I. Solution Blow Spinning of High-Performance Submicron Polyvinylidene Fluoride Fibres: Computational Fluid Mechanics Modelling and Experimental Results. Polymers 2020, 12, 1140.

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