Study of Air Pressure and Velocity for Solution Blow Spinning of Polyvinylidene Fluoride Nanofibres

Rasheed, Aatif, Combrinck, Madeleine, Khaliq, Jibran, Martin, James, Hassanin, Ahmed, Shehata, Nader, Elnabawy, Eman and Shyha, Islam (2021) Study of Air Pressure and Velocity for Solution Blow Spinning of Polyvinylidene Fluoride Nanofibres. Processes, 9 (6). p. 1014. ISSN 2227-9717

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Solution blow spinning (SBS) is gaining popularity for producing fibres for smart textiles and energy harvesting due to its operational simplicity and high throughput. The whole SBS process is significantly dependent on the characteristics of the attenuation force, i.e., compressed air. Although variation in the fibre morphology with varying air input pressure has been widely investigated, there is no available literature on the experimentally determined flow characteristics. Here, we have experimentally measured and calculated airflow parameters, namely, output air pressure and velocity in the nozzle wake at 12 different pressure values between 1 and 6 bar and 11 different positions (retracted 5 mm to 30 mm) along the centreline. The results obtained in this work will answer many critical questions about optimum protrusion length for the polymer solution syringe and approximate mean fibre diameter for polyvinylidene fluoride (PVDF) at given output air pressure and velocity. The highest output air pressure and velocity were achieved at a distance of 3–5 mm away from the nozzle wake and should be an ideal location for the apex of the polymer solution syringe. We achieved 250 nm PVDF fibres when output air pressure and velocity were 123 kPa and 387 m/s, respectively.

Item Type: Article
Additional Information: Funding information: This research was funded by the British Council Grant Number 352360451 and Newton-Mosharafa Call between UK and Egypt, ID: 30886.
Uncontrolled Keywords: solution blow spinning (SBS), air pressure and velocity, computational fluid dynamics (CFD), polyvinylidene fluoride (PVDF), energy harvesting
Subjects: F200 Materials Science
H700 Production and Manufacturing Engineering
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: John Coen
Date Deposited: 08 Jun 2021 12:53
Last Modified: 11 Oct 2021 13:08

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