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

Abstract

The physicochemical properties of Dodecyltrimethylammonium Bromide (DTAB) and Sodium Dodecylsulfate (SDS) rich surfactants in aqueous medium have been studied by surface tension, viscosity, density, and sound velocity at T = 293.15, 298.15, and 303.15 K. The DTAB concentration varies from 0.0001 to 0.03 mol · L−1 in the presence of ≈0.01 mol · L−1 SDS and the SDS concentration varies from 0.001 to 0.015 mol · L−1 in the presence of ≈0.005 mol · L−1 DTAB, so that the concentrations of cationic (DTAB‐rich) and anionic (SDS‐rich) solutions are taken in the ratio of 3:1. The density (ρ) and sound velocity (μ) data are used for calculating apparent molar volume (Vϕ), friccohesity (σ), isentropic compressibility (Ks,ϕ), surface tension (γ), and viscosity (η). These parameters reveals that the relative solute‐solvent and solute‐solute interactions of SDS‐DTAB and DTAB‐SDS in an aqueous medium with the help of physicochemical properties (PCPs).