期刊
JOURNAL OF MOLECULAR LIQUIDS
卷 232, 期 -, 页码 55-61出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molliq.2017.02.044
关键词
Electrical conductivity; FT-IR; H-1 NMR; Ionic liquid; Surface tension; Triton X-100
资金
- Jiangsu Province College Students' Innovative Training Project [201610324044x]
- Excellent Specialties Program Development of Jiangsu Higher Education Institutions, Project [PPZY2015B113]
The adsorption and aggregation of mixed systems for ionic liquid (ILs) surfactants (1-decyl-3-methylimidazolium bromide, C(10)mimBr, 1-dodecyl-3-methylimidazolium bromide, C(12)mimBr, 1-hexadecyl-3-methylimidazolium bromide, C(16)mimBr) and non-ionic surfactant Triton X-100 in aqueous media have been investigated by surface tension measurements, electrical conductivity, H-1 NMR and FTIR technologies. Surface properties have been determined such as critical micelle concentration (CMC), surface saturation adsorption (Gamma(max)), minimum surface area per surfactant molecule (A(min)), surface tension at the CMC (gamma(CMC)), adsorption efficiency (pC(20)), and surface pressure at the CMC (Pi(CMC)) as well as thermodynamic parameters of micellization. The surface tension measurements revealed that the addition of Triton X-100 into Rs can decrease CMC of ILs, suggesting that it is beneficial to the mixed micelle formation. Consistent with the results of surface tension, electrical conductivity measurement demonstrate a small degree of counter-ion binding to form mixed micelles. which may increase with the addition of TX-100. The H-1 NMR data and FT-IR analysis demonstrated the presence of hydrogen-bond between the imidazolium cation of ILs and the PEO units of Triton X-100 and hydrophobic interactions between the alkyl chain of the imidazolium cation and the hydrophobic chain with phenyl of Triton X-100. (C) 2017 Elsevier B.V. All rights reserved.
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