foamIn earlier works [1,2], we have developed a method for measuring the foamability of liquid solutions. The liquid is placed in a Hele-Shaw cell which is flipped several times, thus generating a 2D foam. By analyzing the pictures of the resulting foam, we are able to quantify both foamability and foam stability of any foaming agent.

In our last paper [3], we studied Bovine Serum Albumin (BSA) and Sodium Dodecyl Sulfate (SDS) foams, using our “flip foam” method. Protein-based foams exhibit particular characteristics that are emphasized : (i) heterogeneous cellular structures due to bubble size segregation and (ii) high stability of the foam. Some clues are given regarding the formation of heterogeneous structures in such foam systems.

[1] H.Caps, N.Vandewalle, G. Broze, Phys. Rev. E 73, 065301R (2006) – PDF
[2] H.Caps, N.Vandewalle, G.Broze, and G.Zocchi, Appl. Phys. Lett. 90, 214101 (2007) – PDF
[3] M. Krzan, H. Caps, N. Vandewalle, Colloids and Surf. A 438, 112 (2013) – PDF


About nicovdw

Professor in Physics
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