Research Output

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 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.

  • Type:

    Article

  • Date:

    16 May 2020

  • Publication Status:

    Published

  • Publisher

    MDPI AG

  • DOI:

    10.3390/polym12051140

  • Cross Ref:

    polym12051140

  • Funders:

    British Council

Citation

Atif, R., Combrinck, M., Khaliq, J., Hassanin, A. H., Shehata, N., Elnabawy, E., & Shyha, I. (2020). Solution Blow Spinning of High-Performance Submicron Polyvinylidene Fluoride Fibres: Computational Fluid Mechanics Modelling and Experimental Results. Polymers, 12(5), https://doi.org/10.3390/polym12051140

Authors

Keywords

CFD; SBS; nozzle; PVDF; fibres

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