Hydrophobic forces in thin aqueous films and their role in film thinning

摘要: The thin film pressure balance (TFPB) technique was used to study the kinetics of thinning in presence sodium dodecyl sulfate (SDS) and chloride (NaCl). experimental results were compared with predictions Reynolds equation. During initial stages, controlled by capillary pressure. As thickness is reduced, process surface forces. at which forces begin control vanes surfactant electrolyte concentrations. At low concentrations, there an excellent fit between experiment equation corrected for contributions from hydrophobic disjoining In present work, magnitudes determined equilibrium thicknesses using TFPB technique. high where it difficult determine thicknesses, fitting data work decreased increasing SDS NaCl It may, thus, be role dampen force thereby retard process. (c) 2004 Elsevier B.V. All rights reserved.