Hydrophobic forces in the foam films stabilized by sodium dodecyl sulfate: effect of electrolyte.

Hydrophobic Forces in the Foam Films Stabilized by Sodium Dodecyl Sulfate: Efect of Electrolyte

Further studies of the hydrophobic force in foam films were carried out, including the effect of added inorganic electrolyte. We used a thin film balance of Scheludko-Exerowa type to obtain the disjoining pressure isotherms of the foam films stabilized by 10-4 M sodium dodecyl sulfate in varying concentrations of sodium chloride. The results were compared with the disjoining pressure isotherms ...

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Role of Hydrophobic Forces in the Thinning of the Foam Films in the Presence of Sodium Dodecyl Sulfate

The thin film pressure balance (TFPB) technique was used to study the kinetics of film thinning in the presence of sodium dodecyl sulfate (SDS) and sodium chloride (NaCl). The experimental results were compared with the predictions of the Reynolds equation. During the initial stages, the film thinning was controlled by the capillary pressure. As the film thickness is reduced, the process is con...

Foam superstabilization by polymer microrods.

Few foam systems stabilized by solid particles have been reported, and usually the particles have been used in combination with surfactants. We report how foams can be stabilized solely with a new class of anisotropic particles, hydrophobic polymer microrods of diameter less than 1 mum and length of a few tens of micrometers. The obtained foams were extraordinary stable, retaining a constant vo...

Surface Forces in Foam Films

Fundamental studies of surface forces in foam films are carried out to explain the stability of foams and froths in froth flotation. The thin film pressure balance (TFPB) technique was used to study the surface forces between air bubbles in water from equilibrium film thickness and dynamic film thinning measurements. The results were compared with the disjoining pressure predicted from the Derj...