Nonideal mixed micellar solutions

Hydrogen Ion Titration of Long Alkyl Chain Amine Oxide Micelles

“…On the other hand, the cmc of C12DHEAO shows only a shallow and vague minimum around α M ∼ 0.2. These dependences were analyzed in terms of the regular solution model (RSM) (30,31) with the parameters β = −1.9 for C10DAO and −1.1 for C12DHEAO. For both systems, the calculated curves on the basis of RSM fit the cmc data rather well.…”

Comparing Decyl-β-maltoside and Octaethyleneglycol Mono n-Decyl Ether in Mixed Micelles with Dodecyl Benzenesulfonate

“…By applying the regular solution theory for mixed micelles (11,17), the following expression for the CMC of a surfactant mixture, CMC mix can be derived,…”

Molecular thermodynamic model for gibbs energy of mixing of nonionic surfactant solutions

“…Equation 35 relates the cmc of a mixed surfactant system with the cmc's of single surfactant systems. It is equivalent to the "generalized relationship for the micellization of mixed surfactants" (Nagarajan, 1985;Holland, 1986) if one assumes that activity coefficients of surfactants in the mixed rnicelles are in unison.…”

“…The formation of heterogeneous azeotropes suggest the simultaneous presence of micelles having distinctly different surfactant compositions (Cox and Benson, 1986). Holland (1986) reported the use of the two-suffix Margules activity coefficient equation to describe the nonideality in the mixed micelles for more than thirty mixed surfactant systems. In recent process modeling with nonelectrolytes, the use of Margules equation for the solution nonideality has been largely replaced by local composition models such as the NRTL model.…”