Authors: Lijuan Shi Xinxin Jing Hejun Gao Yingqiu Gu Liqiang Zheng
Publish Date: 2013/01/15
Volume: 291, Issue: 7, Pages: 1601-1612
Abstract
The effects of ionic liquids 12aminoethyl3methylimidazolium chloride MimAECl 1carboxylmethyl3methylimidazolium chloride MimCMCl 12hydroxylethyl3methylimidazolium chloride MimHECl and 1ethyl3methylimidazolium chloride EmimCl on the physicochemical properties of aqueous sodium dodecyl sulfate SDS solutions were studied Compared with EmimCl the presence of amino group can further facilitate the micellization of SDS while the opposite result is observed as carboxyl group is imparted No obvious changes in critical micelle concentration CMC and gamma mathrmCMC values are induced by the neutral hydroxyl group Only the addition of MimAECl drastically increases the micellar size Significant decrease in CMC and increase in micellar size were observed with decreasing pH of MimAECl solution The increase in pH of MimCMCl 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 hydroxyl groups tend to point towards bulk water
Keywords: