Physicochemical Properties of Dodecyltrimethylammonium Bromide (DTAB) and SodiumDodecyl Sulphate (SDS) Rich Surfactants in Aqueous Medium, AtT = 293.15, 298.15, and 303.15 K (original) (raw)

An Interaction of Anionic-and Cationic-Rich Mixed Surfactants in Aqueous Medium through Physicochemical Properties at Three Different Temperatures

e mixed micellization of aqueous binary mixtures of DTAB-rich and SDS-rich surfactants, comprising sodium dodecyl sulfate (SDS) and dodecyltrimethylammonium bromide (DTAB) is studied in aqueous solution by using the physicochemical properties (PCPs) at three different temperatures (T � 293.15, 298.15, and 303.15 K) and P � 0.1 MPa. e DTAB concentration is varied from 0.0001 to 0.03 M/mol·L −1 in the ∼0.01 M/mol·L −1 SDS solution, while the concentration of SDS is varied from 0.001 to 0.015 M/mol·L −1 in the ∼0.005 M/mol·L −1 DTAB. e stable formulations have been obtained by employing the DTAB-rich and SDS-rich surfactants solutions in 3 : 1 ratio. erefore, different phases and aggregated states formed in the ternary combinations of DTAB/SDS/H 2 O have been identified and described. e calculated PCPs have been utilized for determining the nature of the solute-solvent interaction (S L S 0 I). With increasing surfactants concentration, the polarisation of the solution also increases along with an increase in relative viscosity (η r), viscous relaxation time (τ), and surface excess concentration (Γ max). However, the surface area of the molecule (A min), hydrodynamic volume (V h), and hydrodynamic radius (R h) decrease along with an increase in surfactants concentration.

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A critical and comprehensive assessment of interfacial and bulk properties of aqueous binary mixtures of anionic surfactants, sodium dodecylsulfate, and sodium dodecylbenzenesulfonate

Colloid and Polymer Science, 2007

The micellization of mixed binary surfactant systems of sodium dodecylsulfate (SDS) and sodium dodecylbenzenesulfonate (SDBS) has been studied by conductometry, tensiometry, fluorimetry, and microcalorimetry at different mole fractional compositions. The counter-ion binding of micelles, micellar aggregation number, thermodynamics of micellization, interaction of components in the mixed micelles, and their compositions therein and amphiphile packing in micelles have been examined. The adsorption features of the surfactants at the air/solution interface have also been estimated. Correlation of the results and explanations of the findings have been presented. The difference in the head groups of SDS and SDBS has manifested interesting solution and interfacial behaviors.

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Physicochemical Properties of Dodecyltrimethylammonium Bromide (DTAB) and SodiumDodecyl Sulphate (SDS) Rich Surfactants in Aqueous Medium, AtT = 293.15, 298.15, and 303.15 K (original) (raw)

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