Micellar and Surface Properties of Cationic-Cationic Binary Surfactant Mixtures: Synergistic Interactions and Solubility Enhancement of Anthracene

Authors : Elif Berna OLUTAS

Pages : 105-119

Doi:10.16984/saufenbilder.956543

View : 112 | Download : 13

Publication Date : 2022-02-28

Article Type : Research Paper

Abstract :The micellar and surface behaviors of decylammonium chloride insert ignore into journalissuearticles values(DACl); in presence of L-alanine hydrochloride decylester insert ignore into journalissuearticles values(L-ADE); and L-alanine hydrochloride dodecylester insert ignore into journalissuearticles values(L-ADDE); at various mole fractions were investigated by conductivity and surface tension measurements. From the conductivity measurements, the critical micelle concentration insert ignore into journalissuearticles values(CMC);, the degree of counter-ion ionization insert ignore into journalissuearticles values(α); and standard Gibbs energy of micellization insert ignore into journalissuearticles values(ΔG°mic); were investigated for both pure and binary mixtures. The molecular interaction parameter insert ignore into journalissuearticles values(β); and the micellar mole fraction insert ignore into journalissuearticles values(XmDACl); for mixed micelle formation by DACl/L-ADE insert ignore into journalissuearticles values(C10-C10); and DACl/L-ADDE insert ignore into journalissuearticles values(C10-C12); were calculated using the regular solution equation proposed by Rubingh. The ideal values of CMC insert ignore into journalissuearticles values(CMCideal); and the micellar mole fraction insert ignore into journalissuearticles values(XmDAClinsert ignore into journalissuearticles values(ideal);); were also obtained for mixed micelle according to the pseudo phase theoretical models. The negative β values showed that there were synergistic interactions for all compositions of DACl/L-ADE and DACl/L-ADDE mixed systems. From the surface tension measurements, adsorption parameters such as the surface excess concentration insert ignore into journalissuearticles values(Γmax);, minimum surface tension at the CMC, efficiency in the surface tension reduction insert ignore into journalissuearticles values(pC20);, standard Gibbs energy of adsorption insert ignore into journalissuearticles values(ΔG°ads);, and minimum area per head group of a molecule insert ignore into journalissuearticles values(Amin); in pure, mixed and their ideal values were also determined. The results indicated that the synergism and attractive interactions in the studied binary mixtures depend on the chain length of the cationic L-alanine ester and their mole fractions in the mixed system. The solubilization capacity of pure DACl and its mixed system with L-ADE and L-ADDE towards anthracene were determined and discussed in terms of molar solubilization ratio insert ignore into journalissuearticles values(MSR);. Based on the MSR values, the solubility enhancement was found for anthracene in DACl/L-ADE and DACl/L-ADDE mixed systems.
Keywords : surfactants, binary mixtures, micellization, synergistic interactions, solubilization

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