Synthesis and Physico‐Chemical Properties of Sodium 3‐Oxo‐2‐(3‐(4‐sulphonatophenyl)triaz‐2‐enyl)octadecanoate Anionic Surfactant

Abstract

The novel anionic surfactant sodium 3-oxo-2-(3-(4-sulphonatophenyl)triaz-2-enyl)octadecanoate (SSTO) was prepared from renewable raw materials; glycine and palmitic acid. Surface and bulk properties of SSTO were investigated by surface tension and electrical conductivity techniques at 298, 308, 318 and 328 K. Surface properties including critical micelle concentration (CMC), maximum surface excess concentration (C max ), minimum area per molecule (A min ), surface tension at CMC (c CMC ), effectiveness of surface tension reduction (P CMC ), efficiency of surface adsorption (pC 20 ), and degree of counterion dissociation (a) were determined. The thermodynamic parameters of micellization (DG°m ic , DH°m ic and DS°m ic ) and adsorption (DG°a d , DH°a d and DS°a d ) were also investigated at 298, 308, 318 and 328 K. The effect of 3 wt% n-propanol, n-butanol and n-pentanol on surface tension and conductivity at 298 K was also determined.