Abstract
Abstract The effect of ethylene glycol (EG), diethylene glycol (DEG) and their monoalkyl (C1–C6) ethers (cellosolves and carbitols) and dimethyl ethers (glymes and diglymes) on the micellar behavior of a cationic surfactant tetradecyltrimethylammonium bromide (TTAB) in aqueous solution was examined from electrical conductivity measurements. The effect of these additives on critical micelle concentration (CMC) and degree of counter ion dissociation (α) is evaluated. While both EG, DEG, their monomethyl/monoethyl ethers and dimethyl ethers increased CMC and α, for monobutyl and monohexyl ethers a decrease in CMC was noticed at studied concentration. For all ethers, the α values increased with concentration. NOESY experiments confirmed the location of glycol ethers in micellar solution. The results are discussed in terms of effect of ethers on water structure and solvent properties.
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