Self-organization of imidazolium ionic liquids in aqueous solution

Łuczak, Justyna; Hupka, Jan; Thöming, Jorg; Jungnickel, Christian

doi:10.1016/j.colsurfa.2008.07.012

Cited by 348 publications

(205 citation statements)

References 52 publications

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“…For the individual components, CTAB and bmim-octylSO 4 , these values resulted to be 0.9 and 30 mM, respectively, and agree with data reported in literature [34,55,56]. In Fig.…”

Section: Critical Aggregation Concentration (Cac) and Surface Active supporting

confidence: 91%

Catanionic surfactant formation from the interaction of the cationic surfactant hexadecyltrimethylammonium bromide (CTAB) and the ionic liquid 1-butyl-3-methylimidazolium octyl sulfate (bmim-octyl SO4) in aqueous solution

Comelles

Ribosa

González

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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The interaction between the cationic surfactant Hexadecyltrimethylammonium bromide (CTAB) and the ionic liquid 1-butyl-3-methylimidazolium octyl sulfate (bmim-octylSO 4 ) in aqueous solution has been investigated at two total concentrations (0.5 and 10 mM) and different CTAB mole fractions ( CTAB ).Samples of different physical appearance were obtained depending on  CTAB suggesting different kind of aggregates. Bluish solutions ( CTAB from 0.1 to 0.6) were assigned to vesicles of the catanionic surfactant formed (CTA-octylSO 4 ), whereas clear and isotropic solutions ( CTAB  0.6) corresponded to mixed micelles. Surface tension, electrical conductivity, absorbance and dynamic light scattering (DLS) measurements were performed with the aim of correlating properties changes with the aggregation structures. The critical aggregation concentration (cac) and the surface tension value at the cac ( cac ) were much lower for the mixtures than for the individual components. Thiis finding reveals the 3 exceptional surface activity of these mixtures, attributable to the formation of the CTA-octylSO 4 catanionic surfactant. Once the catanionic surfactant is formed it makes no sense to consider anymore the initial CTAB / bmim-octylSO 4 binary system but a new one composed by CTA-octylSO 4 and the excess of bmimoctylSO 4 or CTAB. On the basis of this consideration the surface activity parameters have been recalculated.

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“…For the individual components, CTAB and bmim-octylSO 4 , these values resulted to be 0.9 and 30 mM, respectively, and agree with data reported in literature [34,55,56]. In Fig.…”

Section: Critical Aggregation Concentration (Cac) and Surface Active supporting

confidence: 91%

Catanionic surfactant formation from the interaction of the cationic surfactant hexadecyltrimethylammonium bromide (CTAB) and the ionic liquid 1-butyl-3-methylimidazolium octyl sulfate (bmim-octyl SO4) in aqueous solution

Comelles

Ribosa

González

et al. 2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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show abstract

“…Therefore, it is still one of the most frequently studied subjects in order to find efficient industrial methods to easily and economically break emulsions and desalts crude oil (Xu et al, 2006). The self-organization, micelle formation and surface properties of ionic liquids (Luczak et al, 2008) as well as their use to dehydrate and desalt crude oil have been just recently reported (Guzmán-Lucero et al, 2010;Lemos et al, 2010). These research groups work on the demulsification of water-in-medium, heavy and extra-heavy crude oil emulsions assisted by conventional and microwave assisted heating.…”

Section: Crude Oil Dehydration and Desaltingmentioning

confidence: 99%

Current Knowledge and Potential Applications of Ionic Liquids in the Petroleum Industry

José-Alberto¹,

Jorge²

2011

Ionic Liquids: Applications and Perspectives

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“…It was proposed that the short-chain [C 4 mim][BF 4 ] formed polydisperse spherical aggregates, whereas the [C 8 mim]I formed regularly sized micelles above the cmc. The micelle formation of surface active [C 2n mim] + (n = 4~8) in aqueous solution was investigated by several methods, such as surface tension, electrical conductivity measurements and fluorescence techniques et al (Blesic et al, 2007;Blesic et al, 2008;Dong et al, 2007;Dong et al, 2008a;Dong et al, 2008b;El Seoud et al, 2007;Inoue et al, 2007;Jungnickel et al, 2008;Luczak et al, 2008;Luczak et al, 2009;Modaressi et al, 2007b;Singh & Kumar, 2007Vanyur et al, 2007;Wang et al, 2008;Wang et al, 2007;Zhang et al, 2008b;Zhao et al, 2008a). Results showed that the long chain imidazolium ILs acted as ionic surfactants and stronger aggregation tendency of the ILs might be attributed to characteristic nature of imidazolium head group such as potency of H-bond formation, which is lacking in common ionic surfactants.…”

Section: Wwwintechopencommentioning

confidence: 99%