“…In recent years, with the above ends in view, detailed studies on mixed surfactant systems have been made (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13). The binary mixtures of nonionic-nonionic, nonionic-ionic, and ionic-ionic surfactants have been considered and experimental results have been analyzed and compared in the light of the proposed solution and thermodynamic theories of Clint (14), Motomura (15), Rubingh (16), and Sarmoria, Puvvada, and Blankschtein (17).…”