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Ultrasonic studies of the development of flocculation in mixed sodium caseinate and Tween 20 emulsions

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Trends in Colloid and Interface Science XV

Part of the book series: Progress in Colloid and Polymer Science ((PROGCOLLOID,volume 118))

Abstract

Ultrasonic velocity and attenuation measurements were performed for a series of emulsions containing sodium caseinate and Tween 20. The kinetics of creaming were followed in order to establish relationships between depletion flocculant concentration and the onset of creaming. An interesting phenomenon was noticed where attenuation throughout the bulk of the emulsion dropped from very high values to lower ones with time. This was more intense at higher concentrations of Tween 20 (more flocculated emulsions). The lower attenuation values corresponded approximately to the theoretically predicted attenuation spectra for flocculated emulsions. The explanation for the higher attenuation at the beginning of the lifetime of the emulsions seems to be related to the formation of a transient gel spanning throughout the structure, eventually breaking up to produce discretely creaming flocs.

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Author information

Authors and Affiliations

  1. Procter Department of Food Science, University of Leeds, Leeds, LS2 9JT, UK

    Christos Ritzoulis, Eric Dickinson, Malcolm J. W. Povey & Yongtao Wang

Authors
  1. Christos Ritzoulis
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  2. Eric Dickinson
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  3. Malcolm J. W. Povey
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  4. Yongtao Wang
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Editor information

Editors and Affiliations

  1. Department of Chemical Engineering, University of Patras, GR26500, Patras, GREECE

    Petros G. Koutsoukos

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© 2001 Springer-Verlag

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Ritzoulis, C., Dickinson, E., Povey, M.J.W., Wang, Y. (2001). Ultrasonic studies of the development of flocculation in mixed sodium caseinate and Tween 20 emulsions. In: Koutsoukos, P.G. (eds) Trends in Colloid and Interface Science XV. Progress in Colloid and Polymer Science, vol 118. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-45725-9_30

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  • DOI: https://doi.org/10.1007/3-540-45725-9_30

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-42241-9

  • Online ISBN: 978-3-540-45725-1

  • eBook Packages: Springer Book Archive

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