Cetyltrimethylammonium hydroxide CTAOH

Reactive counterion surfactants have only one counterion and it is also the reactant, for example, OH in cetyltrimethylammonium hydroxide (CTAOH) micelles. The stoichiometric concentration of micellized N, [Nm] increases incrementally with added surfactant, but the interfacial molarity, Nm, is constant because, in the original development of pseudophase models, the assumption was made that [Nm]/[Sm] = P and that is constant and independent of surfactant concentration and the concentration of any added salt. Equation (15) reduces to (17). Equation (17) has the same mathematical form as (11) for first-order reactions. 

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