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

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 or...

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Autores principales: Atif, Rasheed, Combrinck, Madeleine, Khaliq, Jibran, Hassanin, Ahmed H., Shehata, Nader, Elnabawy, Eman, Shyha, Islam
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7284647/
https://www.ncbi.nlm.nih.gov/pubmed/32429457
http://dx.doi.org/10.3390/polym12051140
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author Atif, Rasheed
Combrinck, Madeleine
Khaliq, Jibran
Hassanin, Ahmed H.
Shehata, Nader
Elnabawy, Eman
Shyha, Islam
author_facet Atif, Rasheed
Combrinck, Madeleine
Khaliq, Jibran
Hassanin, Ahmed H.
Shehata, Nader
Elnabawy, Eman
Shyha, Islam
author_sort Atif, Rasheed
collection PubMed
description 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.
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spelling pubmed-72846472020-06-15 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 Polymers (Basel) Article 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. MDPI 2020-05-16 /pmc/articles/PMC7284647/ /pubmed/32429457 http://dx.doi.org/10.3390/polym12051140 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Atif, Rasheed
Combrinck, Madeleine
Khaliq, Jibran
Hassanin, Ahmed H.
Shehata, Nader
Elnabawy, Eman
Shyha, Islam
Solution Blow Spinning of High-Performance Submicron Polyvinylidene Fluoride Fibres: Computational Fluid Mechanics Modelling and Experimental Results
title Solution Blow Spinning of High-Performance Submicron Polyvinylidene Fluoride Fibres: Computational Fluid Mechanics Modelling and Experimental Results
title_full Solution Blow Spinning of High-Performance Submicron Polyvinylidene Fluoride Fibres: Computational Fluid Mechanics Modelling and Experimental Results
title_fullStr Solution Blow Spinning of High-Performance Submicron Polyvinylidene Fluoride Fibres: Computational Fluid Mechanics Modelling and Experimental Results
title_full_unstemmed Solution Blow Spinning of High-Performance Submicron Polyvinylidene Fluoride Fibres: Computational Fluid Mechanics Modelling and Experimental Results
title_short Solution Blow Spinning of High-Performance Submicron Polyvinylidene Fluoride Fibres: Computational Fluid Mechanics Modelling and Experimental Results
title_sort solution blow spinning of high-performance submicron polyvinylidene fluoride fibres: computational fluid mechanics modelling and experimental results
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7284647/
https://www.ncbi.nlm.nih.gov/pubmed/32429457
http://dx.doi.org/10.3390/polym12051140
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