Comparative Investigations on Mixing Behaviors of Cationic Gemini Surfactant with Surface Active Ionic Liquid in Water and in Ethylammonium Nitrate
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- 作者：Shuzhen Wang ; Tianxiang Yin ; Weiguo Shen
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2014
- 出版时间：November 26, 2014
- 年：2014
- 卷：53
- 期：47
- 页码：18202-18208
- 全文大小：289K
- ISSN：1520-5045
文摘
The properties of mixed surfactants of 1-tetradecyl-3-methylimidazolium bromide (C14mimBr) and the gemini surfactant N,N鈥?bis(dimethyldodecyl)-1,2-ethanediammonium dibromide (12-2-12) in water and in ethylammonium nitrate (EAN) were studied by surface tensiometry. The critical micelle concentration (cmc) values of the mixed surfactants were determined and found to be much larger in EAN than in water. The nonideal mixing behaviors were observed at the air/solvent interface and in the mixed micelle both in water and in EAN. The surface pressure at the cmc (蟺cmc), the maximum surface excess (螕max), the minimum surface area per molecule (Amin), the standard Gibbs free energies of micellization (螖Gm0) and adsorption (螖Gads0), and the excess Gibbs free energy of mixed micelles (螖GE) were determined. It was found that physicochemical properties of C14mimBr/12-2-12 mixed systems in water and in EAN were significantly different, which was discussed in terms of different properties of the solvents.