The Self-Association and Mixed Micellization of an Anionic Surfactant, Sodium Dodecyl Sulfate, and a Cationic Surfactant, Cetyltrimethylammonium Bromide: Conductometric, Dye Solubilization, and Surface Tension Studies. Issue 11 (1st November 2016)

• Record Type: Journal Article
• Authors: Alam, Md. Sayem; Ragupathy, R.; Mandal, Asit Baran
• Is Part Of: Journal of dispersion science and technology. Volume 37:Issue 11(2016)
• Page Start: 1645
• Page End: 1654
• Publication Date: 2016-11-01
• Subjects: Critical micelle concentration -- CTAB -- mixed micelles -- SDS -- thermodynamics; Emulsions -- Periodicals; Suspensions (Chemistry) -- Periodicals; Emulsions; Suspensions; 541.34
• DOI: 10.1080/01932691.2015.1120677
• Languages: English
• ISSNs: 0193-2691

Abstract

Abstract : In the present study, we investigate the self-association and mixed micellization of an anionic surfactant, sodium dodecyl sulfate (SDS), and a cationic surfactant, cetyltrimethylammonium bromide (CTAB). The critical micelle concentration ( CMC ) of SDS, CTAB, and mixed (SDS + CTAB) surfactants was measured by electrical conductivity, dye solubilization, and surface tension measurements. The surface properties (viz., C20 (the surfactant concentration required to reduce the surface tension by 20 mN/m), Π CMC (the surface pressure at the CMC ), Γ max (maximum surface excess concentration at the air/water interface), and A min (the minimum area per surfactant molecule at the air/water interface)) of SDS, CTAB, and (SDS + CTAB) micellar/mixed micellar systems were evaluated. The thermodynamic parameters of the micellar (SDS and CTAB), and mixed micellar (SDS + CTAB) systems were evaluated. A schematic representation of micelles and mixed micelles. GRAPHICAL ABSTRACT: