Mutual Diffusion Measurements in a Ternary System: Ionic Surfactant−Nonionic Surfactant−Water at 25 °C

The four diffusion coefficients describing the isothermal transport process in ternary systems have been measured in aqueous solutions of mixed surfactants. Measurements have been made on the system pentaethyleneglycol 1-hexyl ether−sodium 1-hexanesulfonate−water at various mean compositions. The analysis of diffusion data allows a reasonable interpretation of the behavior of mixed surfactant solutions, showing the evidence of the presence of mixed micelles.