Surfactant accumulation within the top foam layer due to rupture of external foam films

Document Type

Article

Publication Date

2-28-2008

Abstract

The analysis of processes taking place in a steady pneumatic (dynamic) foam shows the possibility of different modes of surfactant accumulation within the top layers of bubbles due to rupture of external foam films. An increasing surfactant concentration within the top layers promotes the stabilisation of bubbles and the foam as a whole. Considering the balance of surfactant and water during the bursting of films it is possible to estimate the accumulated surfactant loss caused by a downwards flow through the Plateau borders of the subsurface bubble layer. This effect depends on the particular conditions, especially on the surfactant activity and concentration of the surfactant, water volume fraction in the foam and size of foam bubbles. The process of surfactant accumulation in the top foam bubble layer can be complicated due to the removal of part of the accumulated surfactant through transport with droplets spread out during bubble bursting. © 2007 Elsevier B.V. All rights reserved.

Identifier

38349192338 (Scopus)

Publication Title

Advances in Colloid and Interface Science

External Full Text Location

https://doi.org/10.1016/j.cis.2007.07.004

ISSN

00018686

PubMed ID

17765861

First Page

45

Last Page

56

Issue

1

Volume

137

Grant

MAP AO-99-052

Fund Ref

European Space Agency

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