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Richard Holdich
Richard
Holdich
Marijana Dragosavac
Marijana
Dragosavac
Goran Vladisavljevic
Goran
Vladisavljevic
S.R. Kosvintsev
S.R.
Kosvintsev
Membrane emulsification with oscillating and stationary membranes
Loughborough University
2010
Emulsification
Sieve-membrane
Force balance
Vibrating membrane
Oscillation
Chemical Engineering not elsewhere classified
2010-04-29 15:27:30
Journal contribution
https://repository.lboro.ac.uk/articles/journal_contribution/Membrane_emulsification_with_oscillating_and_stationary_membranes/9240266
Membrane emulsification of sunflower oil in aqueous solutions of 2% (vol/vol)
Tween 20 was performed using a stationary disk membrane with a rotating paddle
stirrer and, for comparison, a tubular membrane oscillating normal to the direction of
oil flow in an otherwise stationary continuous phase. The oscillation frequency ranged
from 10 to 90 Hz. The oil was injected through a sieve-type membrane with a 10 μm
pore size and 180 μm between pore spacing at low flux rates to minimise any droplet
interference. Using the same membrane material under identical peak shear conditions
in both systems, smaller and more uniform drops (30 to 50 μm median sizes) were
produced in the oscillating system. In oscillation, the drop size was modelled by a
force balance, including a correction for neck formation at the pore surface, but in the
rotating paddle system neck formation did not appear to be relevant. Drop size was
not found to be frequency of oscillation dependent, apart from its influence on the
shear stress at the membrane surface.