Correlation between adsorption isotherms, thin liquid films and foam properties of protein/surfactant mixtures: Lysozyme/C10DMPO and lysozyme/SDS

Foaming properties of mixtures of a non-ionic (C12DMPO) and an ionic surfactant (C12TAB)

“…of the mixture with the greatest foam stability, we studied the foaming properties of C 12 DMPO:C 12 TAB = 1:1 at various concentrations. 4 In Fig. 5 (top) the foam volume V foam as a function of time is shown for three different concentrations (c = 0.5, 1.0 and 2.0 cmc).…”

“…In order to compare properties of foams that have been generated by different techniques we generated foams from C 12 DMPO:C 12 TAB mixtures using the standardized Ross-Miles 4 For an examination of C 12 DMPO:C 12 TAB = 1:50 at various bulk surfactant concentration see supporting material, Figure S3 or in the case of C 12 TAB see Ref. [32].…”

“…Although the majority of studies deals with single surfactant systems (see [1,2] for an extensive overview), foams stabilized by protein-surfactant mixtures [4][5][6][7], polymer-surfactant mixtures [8,9], alcohol-surfactant mixtures [10][11][12], solid particles [13][14][15][16][17] and liquid crystals [18][19][20] have also been investigated. However, there exists a lack of experimental data and thus a lack of knowledge on the foaming properties of surfactant-surfactant mixtures [21][22][23][24][25][26][27] although studying surfactant mixtures is indispensable in order to understand and to optimize technical products and processes where foam films and foams are involved.…”

β-Lactoglobulin aggregates in foam films: Effect of the concentration and size of the protein aggregates

“…Under certain conditions, in the presence of a sufficient amount of nonaggregated proteins, the foam stability is improved by the aggregates [8]. If the link between the foam film stability and that of foams stabilized by nonaggregated proteins has been well discussed [1,2,[13][14][15], much less is known about the foam films stabilized by protein aggregates. We have shown in a previous article that for solutions containing only protein aggregates a strong correlation exists between the stability of a foam and the properties of the corresponding foam film (stability and resistance to pressure).…”

β-Lactoglobulin aggregates in foam films: Correlation between foam films and foaming properties

“…It is now well known that the stability of foams is mainly dominated by the stability of the thin liquid films between bubbles [13]. If the link between the foam film stability and that of foams stabilized by non-aggregated proteins has been well discussed [4,[14][15][16], much less is known about the foam films stabilized by protein aggregates. When aggregates adsorb at the interface, they can cross-link the two thin films of adjacent bubbles, leading to stable films [16][17][18].…”