Thermodynamic and Self-Assembly Properties of Sodium Bis(2-ethylhexyl) Sulfosuccinate in Polyethylene Glycol 200 and Water Mixed Solvent Media

The micellization behavior of sodium bis­(2-ethylhexyl) sulfosuccinate (AOT) in mixed solvent media of polyethylene glycol 200 (PEG 200) and water with varying mass fractions of PEG 200 has been studied by conductivity and isothermal titration microcalorimetry (ITC) methods. The results showed that...

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Bibliographic Details
Published in:Journal of chemical and engineering data 2019-01, Vol.64 (1), p.1-8
Main Authors: Li, Sha, Ye, Mengzhen, Han, Meng, Zhang, Qian, Liu, Min, Liu, Jie, Sun, Dezhi
Format: Article
Language:English
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Summary:The micellization behavior of sodium bis­(2-ethylhexyl) sulfosuccinate (AOT) in mixed solvent media of polyethylene glycol 200 (PEG 200) and water with varying mass fractions of PEG 200 has been studied by conductivity and isothermal titration microcalorimetry (ITC) methods. The results showed that micelles existed at a certain ratio of PEG 200 in the mixed solvent. The critical micelle concentration (CMC) of AOT increased with increasing PEG 200 amount in mixed solvent, with the extent of the increase dependent on the decreased polarity and “structure-breaking effect” of the cosolvent. From the change in the Gibbs free energy of micellization (ΔG m °) relative to pure water, it was found that the systems containing a lower amount of PEG 200 (
ISSN:0021-9568
1520-5134
DOI:10.1021/acs.jced.8b00250