File(s) under permanent embargo

Reason: This item is currently closed access.

Effect of emulsifier type on droplet disruption in repeated Shirasu porous glass membrane homogenization

journal contribution
posted on 01.08.2012 by Goran Vladisavljevic, Jeonghee Surh, D. Julian McClements
The influence of various emulsifier types (anionic, nonionic, and zwitterionic) on the mean particle size, transmembrane flux, and membrane fouling in repeated membrane homogenization using a Shirasu porous glass (SPG) membrane has been investigated. Oil-in-water (O/W) emulsions (40 wt % corn oil stabilized by 0.06−2 wt % sodium dodecyl sulfate (SDS) or 0.1−2 wt % Tween 20 at pH 3 or 0.5−2 wt % β-lactoglobulin (β-Lg) at pH 7) were prepared by passing coarsely emulsified feed mixtures five times through the membrane with a mean pore size of 8.0 μm under the transmembrane pressure of 100 kPa. The flux increased as the number of passes increased, tending to a maximum limiting value. The maximum flux for the Tween 20-stabilized emulsions (5−47 m3·m-2·h-1) was smaller than that for the SDS-stabilized emulsions (29−60 m3·m-2·h-1) because less energy was needed for the disruption of a SDS-stabilized droplet due to the lower interfacial tension. The mean particle size after five passes was 4.1−6.8 and 6.4−8.7 μm for 0.1−2 wt % SDS and Tween 20, respectively. The flux in the presence of β-Lg was much smaller than that in the presence of SDS and Tween 20, which was a consequence of more pronounced membrane fouling, due to the protein adsorption to the membrane surface. After five passes through the membrane, the fouling resistance in the presence of 2 wt % β-Lg (1.1 × 1010 1/m) was 2 orders of magnitude higher than that for 0.5 wt % Tween 20 and an order of magnitude higher than the membrane resistance. If a clean membrane was used in the fifth pass, a 2-fold reduction of the fouling resistance was observed.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Citation

VLADISAVLJEVIC, G.T., SURH, J. and MCCLEMENTS, D.J., 2006. Effect of emulsifier type on droplet disruption in repeated Shirasu porous glass membrane homogenization. Langmuir, 22 (10), pp. 4526-4533.

Publisher

© American Chemical Society

Version

NA (Not Applicable or Unknown)

Publication date

2006

Notes

This article was published in the journal, Langmuir: http://pubs.acs.org/journal/langd5

ISSN

0743-7463

eISSN

1520-5827

Language

en

Exports

Logo branding

Keyword(s)

Exports