Processing effects during rotating membrane emulsification

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Processing effects during rotating membrane emulsification. / Lloyd, David; Norton, Ian; Spyropoulos, Fotios.

In: Journal of Membrane Science, Vol. 466, 15.09.2014, p. 8-17.

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@article{b88f91e320c04b25ad0bcb13d29b587e,
title = "Processing effects during rotating membrane emulsification",
abstract = "In this study, a rotating membrane emulsification setup incorporating a 6.1μm pore diameter SPG membrane was used to produce O/W emulsions of average droplet sizes between 23.4 and 216.6μm. All emulsions consisted of 10vol% of sunflower oil or silicone oil stabilised by 1wt% Tween 20. The transmembrane pressure (0.1-1.8bar), rotational speeds (100-2000RPM) annular gap width (5-45mm), dispersed and continuous phase viscosity were all investigated as to their effect on emulsion droplet size and dispersed phase flux. Modification of the dispersed phase flow properties alters the droplet size with four regions being suggested; a decrease in size (as droplet coalescence is minimised), a plateau (size-stable zone), a gradual increase in size (due to transfer of mass via droplet neck) and then a rapid increase (due to jetting). The importance of Taylor vortices development was seen with larger droplets formed in their absence; typically at low rotational speeds, narrow vessel diameters and more viscous continuous phases. It was concluded that the flow behaviour of each phase requires careful consideration to understand the likely formation mechanism(s) during operation. Across the pressure and viscosity ranges investigated, the dispersed phase flux ranged between 50 and 12,500Lm-2h-1 and pore activity was within the range of 0.5-2.7%.",
keywords = "Dynamic interfacial tension, Flow behaviour, Membrane emulsification, Rotating membrane, Shirasu porous glass membrane",
author = "David Lloyd and Ian Norton and Fotios Spyropoulos",
year = "2014",
month = sep,
day = "15",
doi = "10.1016/j.memsci.2014.04.035",
language = "English",
volume = "466",
pages = "8--17",
journal = "Journal of Membrane Science",
issn = "0376-7388",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Processing effects during rotating membrane emulsification

AU - Lloyd, David

AU - Norton, Ian

AU - Spyropoulos, Fotios

PY - 2014/9/15

Y1 - 2014/9/15

N2 - In this study, a rotating membrane emulsification setup incorporating a 6.1μm pore diameter SPG membrane was used to produce O/W emulsions of average droplet sizes between 23.4 and 216.6μm. All emulsions consisted of 10vol% of sunflower oil or silicone oil stabilised by 1wt% Tween 20. The transmembrane pressure (0.1-1.8bar), rotational speeds (100-2000RPM) annular gap width (5-45mm), dispersed and continuous phase viscosity were all investigated as to their effect on emulsion droplet size and dispersed phase flux. Modification of the dispersed phase flow properties alters the droplet size with four regions being suggested; a decrease in size (as droplet coalescence is minimised), a plateau (size-stable zone), a gradual increase in size (due to transfer of mass via droplet neck) and then a rapid increase (due to jetting). The importance of Taylor vortices development was seen with larger droplets formed in their absence; typically at low rotational speeds, narrow vessel diameters and more viscous continuous phases. It was concluded that the flow behaviour of each phase requires careful consideration to understand the likely formation mechanism(s) during operation. Across the pressure and viscosity ranges investigated, the dispersed phase flux ranged between 50 and 12,500Lm-2h-1 and pore activity was within the range of 0.5-2.7%.

AB - In this study, a rotating membrane emulsification setup incorporating a 6.1μm pore diameter SPG membrane was used to produce O/W emulsions of average droplet sizes between 23.4 and 216.6μm. All emulsions consisted of 10vol% of sunflower oil or silicone oil stabilised by 1wt% Tween 20. The transmembrane pressure (0.1-1.8bar), rotational speeds (100-2000RPM) annular gap width (5-45mm), dispersed and continuous phase viscosity were all investigated as to their effect on emulsion droplet size and dispersed phase flux. Modification of the dispersed phase flow properties alters the droplet size with four regions being suggested; a decrease in size (as droplet coalescence is minimised), a plateau (size-stable zone), a gradual increase in size (due to transfer of mass via droplet neck) and then a rapid increase (due to jetting). The importance of Taylor vortices development was seen with larger droplets formed in their absence; typically at low rotational speeds, narrow vessel diameters and more viscous continuous phases. It was concluded that the flow behaviour of each phase requires careful consideration to understand the likely formation mechanism(s) during operation. Across the pressure and viscosity ranges investigated, the dispersed phase flux ranged between 50 and 12,500Lm-2h-1 and pore activity was within the range of 0.5-2.7%.

KW - Dynamic interfacial tension

KW - Flow behaviour

KW - Membrane emulsification

KW - Rotating membrane

KW - Shirasu porous glass membrane

U2 - 10.1016/j.memsci.2014.04.035

DO - 10.1016/j.memsci.2014.04.035

M3 - Article

VL - 466

SP - 8

EP - 17

JO - Journal of Membrane Science

JF - Journal of Membrane Science

SN - 0376-7388

ER -