L. Shi, X. Jing, H. Gao, Y. Gu and L. Zheng,Ionic liquid-induced changes in the properties of aqueous sodium dodecyl sulfate solution: effect of acidic/basic functional groups,Colloid Polym. Sci.,2013,291(7), 1601-1612.

The effects of ionic liquids 1-(2-aminoethyl)-3-methylimi dazolium chloride ( [Mi m AE]Cl), 1-carboxylmeth l-3-methyl imidazolium chloride ([Mim CM]Cl ), 1 -(2-hydroxylethyl)-3-methylimidazolium chloride ([MimHE]Cl ), and 1-ethyl-3-m ethylim idazolium c hloride ([Emim]Cl) on the physicochemical properties of aqueous sodiumdodecyl sulfate (SDS) solutions were studied. Compared with [Emim]Cl, t he presence of amino group can further facilitate the m ic ellization of SDS, w hile the opposite result is observed as carboxyl group is imparted. No obvious changes in critical micelle concentration (CMC) and γCMC values are induced by the neutral hydroxyl group. Only the addition of [MimAE]Cl drastically increases the micellar size. Significant decrease in CMC and increase in micellar size were observed with decreasing pH of [MimAE]Cl solution. The increase in pH of [MimCM]Cl solution results in a slight increase in CMC and decrease in micellar size.1H NMR spectra revealed the amino groups are adsorbed at the micellar surface, while the carboxyl groups/carboxylate ions and hy-droxyl groups tend to point towards bulk water.