Critical Micelle Concentration and HLB of the Sodium Oleate–Hexadecyltrimethylammonium Bromide Mixed System

Abstract

The critical micelle concentration of sodium oleate-hexadecyltrimethylammonium bromide mixtures was determined as a function of the mixture composition and analyzed with Rubingh's theory, showing a strong nonideality. The hydrophile-lipophile balance (HLB) of the mixtures was also measured and the validity of the additivity rule for the HLB of surfactants mixtures was tested. Results were compared with the aggregation behavior of that mixture. Both the HLB and the critical micelle concentration dependencies on the mixture composition exhibit a negative deviation when compared with ideal behavior, which is explained on the basis of the interactions between components and surfactant partitioning between the bulk and the interface.

Effect of Inorganic Additives on a Conventional Anionic–Nonionic Mixed Surfactants System in Aqueous Solution

“…Such effect of the mixture is said to be synergistic. Synergism or antagonism properties are often exhibited due to mixtures of different types of surfactants [13][14][15][16][17]. The observed synergism can be referred to as nonideal mixing, whereas the antagonism property exhibits the repulsion between two surfactants and the CMC is higher than the expected.…”

Physicochemical Interactions of Chlorpheniramine Maleate with Sodium Deoxycholate in Aqueous Solution

“…The ideal value of x 1 is given by Eq. (Miraglia et al, ; Singh and Ismail, ): …”

“…Due to the interaction between surfactants and the drug, the nonideality in the mixed micelle can be assessed by evaluating molar excess standard free energy of micellization, . The reported (Miraglia et al, ) expression for is given by Eq. : …”

Stable poly(St-co-BA) nanoemulsion polymerization for high performance antibacterial coatings in the presence of dioctyldimethylammonium chloride

“…A direct method for solving the relatively poor emulsifying ability of D821 involves adding a synergistic emulsifier. As a conventional surfactant, cetyltrimethyl ammonium bromide (CTAB, CAS: 57-09-0) has been widely used in CTABnonionic, CTAB-anionic and CTAB-cationic mixed surfactant systems [29][30][31][32]. An effective approach for improving the performance of latex films involves adding a functional monomer to the polymerization [33,34].…”