High stability of the bovine serum albumine foams evidenced in Hele–Shaw cell

The generation of a reproducible two-dimensional foams is performed by flipping many times a Hele–Shaw cell partially filled with a foaming agent/water mixture. This process of foam generation is observed and depends on the chemical composition of the solution. Bovine Serum Albumin (BSA) and Sodium Dodecyl Sulfate (SDS) foams are studied using this system. Protein-based foams exhibit particular characteristics that are emphasized: (i) heterogeneous cellular structures due to bubble size segregation and (ii) relatively high stability of the foam. Some clues are given regarding the formation of heterogeneous structures in such foam systems.