Sonodisruption of re-assembled casein micelles at different pH values

Ashkan Madadlou, Mohammad Ebrahimzadeh Mousavi, Zahra Emam-djomeh, Mohammadreza Ehsani, David Sheehan

Research output: Contribution to journalArticlepeer-review

63 Scopus citations

Abstract

Casein solutions with different pH values were sonicated at a frequency of 35 kHz and increasing acoustic powers. As the sonication power increased, turbidity of solutions and particle diameter decreased at any given pH value, suggesting particles disruption due to the ultrasonic treatment. The magnitude of decrease in re-assembled micelles diameter was greater at a higher pH, indicating an interaction between pH and sonication power in sonodissociation. This interaction is attributed to a looser structure of micelles at higher pH values which increases the efficiency of ultrasonic disruption and not directly to the increased cavitation efficiency. We argue that increased cavitation efficiency with increasing sonication power, which enhances shear forces is the most likely reason for sonodisruption of re-assembled casein micelles.

Original languageBritish English
Pages (from-to)644-648
Number of pages5
JournalUltrasonics Sonochemistry
Volume16
Issue number5
DOIs
StatePublished - Jun 2009

Keywords

  • Casein
  • Cavitation
  • Dissociation
  • Ultrasound

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