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Influence of β-lactoglobulin and its surfactant mixtures on velocity of the rising bubbles

Ulaganathan, V ; Sharif University of Technology

2004 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.colsurfa.2014.04.041
  3. Abstract:
  4. The rising velocity of air bubbles in surfactant solutions is a sensitive measure for the formation of a dynamic adsorption layer (DAL) at the bubble surface. Due to a certain surface coverage by adsorbed species the bubble surface starts to become immobilized and the rising velocity is retarded. There is a large difference in the retardation effect in presence of the protein β-lactoglobulin (BLG) alone and its mixed solutions with surfactants. In presence of added surfactants BLG forms complexes, which adsorb and retard the bubble rising velocity according to their respective surface activity and adsorption kinetics. While the nonionic surfactant C12DMPO does not show significant increase in retardation effects as compared to BLG alone, the ionic surfactants SDS and DoTAB form highly surface active complexes and change the rising velocity much stronger
  5. Keywords:
  6. BLG adsorption ; Diffusion controlled adsorption ; Dynamic adsorption layer ; Mixed BLG/surfactant adsorption ; Rising bubble velocity ; Diffusion controlled ; DoTAB ; Dynamic adsorption ; Rising bubbles ; SDS ; 5,5 dimethyl 1 pyrroline 1 oxide ; Beta lactoglobulin ; Cationic surfactant ; Dodecyl sulfate sodium ; Ionic surfactant ; Nonionic surfactant ; Surfactant ; Adsorption ; Adsorption kinetics ; Aqueous solution ; Bubble ; Complex formation ; Diffusion ; Immobilization ; Material state ; Velocity
  7. Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects ; Vol. 460 , October , 2014 , pp. 361-368 ; ISSN: 09277757
  8. URL: http://www.sciencedirect.com/science/article/pii/S0927775714004063