Aqueous two-phase systems containing imidazolium ionic liquids and a Tween surfactant

Morandeira, Lois; Deive, Francisco J.; Sanromán, M.A.; Rodríguez, Ana; Álvarez, María S.

doi:10.1016/j.jct.2016.10.025

Cited by 14 publications

(6 citation statements)

References 16 publications

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“…As the widespread empirical correlation equations, the Othmer−Tobias and Bancroft equations (eqs 5 and 6) were used to correlate the tie-line compositions of many ATPSs. 22,31,32,[42][43][44]51 In investigated systems, the tie-lines data was fitted by using these two equations…”

Section: Resultsmentioning

confidence: 99%

“…The corresponding tie-lines were shown in Figures – . As the widespread empirical correlation equations, the Othmer–Tobias and Bancroft equations (eqs and ) were used to correlate the tie-line compositions of many ATPSs. ,,,− , In investigated systems, the tie-lines data was fitted by using these two equations where w stands for the mass fraction of materials in ATPS, the subscripts “1”, “2”, and “3” respectively represent three substances of systems (POELE20, salt, and water), the superscripts “t” and “b” represent two phases of ATPS (the top phase and bottom phase), and k 1 , k 2 , n , and r were the fitting parameters whose values were shown in Table . The square of correlation coefficient values ( R 2 ) and standard deviations (sd) were shown in Table , and it was found that these two equations were qualified for the studied systems.…”

Section: Resultsmentioning

confidence: 99%

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Measurement and Correlation of Phase Equilibria in Aqueous Two-Phase Systems Containing Polyoxyethylene Cetyl Ether and Three Organic Salts at Different Temperatures

Yang

Sun

et al. 2018

J. Chem. Eng. Data

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The polymer polyoxyethylene(20) cetyl ether (C 56 H 114 O 21 , POELE20) and three salts (K 2 C 2 O 4 , K 2 C 4 H 4 O 6 , and K 3 C 6 H 5 O 7 ) were the phase-forming materials to build the aqueous two-phase system (ATPS) at the temperatures 288.15, 298.15, and 308.15 K. The data of the phase diagram including binodal curve data and tie-line data were determined and fitted by classical equations, and they obtained the satisfactory correlation effect. The phase-forming ability of salt composed of the same cation was investigated by three factors, namely, the valence of the anion, the Gibbs free energy of the anion, and the value of effective excluded volume (EEV). It was found that the phase-forming ability of salt strengthened when the values of said three factors went up. The results of the analysis on the data from the present work and that in our previous paper showed that the order of the phase-forming ability of salts was KOH

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Measurement and Correlation of Phase Equilibria in Aqueous Two-Phase Systems Containing Polyoxyethylene Cetyl Ether and Three Organic Salts at Different Temperatures

Yang

Sun

et al. 2018

J. Chem. Eng. Data

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“…Nevertheless, in our studied {K 3 PO 4 +ChGly+Triton X‐102+H 2 O} system, we found in the biphasic region (i) a Triton X‐102 rich and (ii) a K 3 PO 4 +ChGly rich phase. Under this circumstances, it should be possible to predict the influence of temperature as both, salt and IL, have the same increasing trend at higher degrees for segregating phases with surfactants‐type polymers …”

Section: Resultsmentioning

confidence: 99%

“…Under this circumstances, it should be possible to predict the influence of temperature as both, salt and IL, have the same increasing trend at higher degrees for segregating phases with surfactants-type polymers. [27,28]…”

Section: Biphasic and Three-phase Regions Dependences: Foundation Stomentioning

confidence: 99%

Setting the Foundations of Aqueous Three‐Phase Systems (A3PS) in the Quest for a Rational Design

et al. 2019

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This work presents the first in‐depth study of Aqueous Three‐Phase Systems (A3PS) with the main purpose of unveiling their behaviour, hence contributing to the development of this new field. Thus, a complete definition of a quaternary system was carried through by describing all the regions in detail to represent them later on in a regular‐tetrahedral diagram. The three aqueous faces of the tetrahedron demonstrated an undeviating influence in the segregation capacity. Furthermore, a method for comparing Aqueous Biphasis Systems (ABS) immiscibilities was set up in order to allow the evaluation and detection of the “limiting ABS” for the three‐phase region. Finally, all this information was compiled and utilised to obtain a new strategy for an A3PS rational design, which can be applied with ABS libraries or in an experimental approach. In this sense, this strategy represents an undoubted advance towards future studies and development of A3PS, as this sequential application of the constructed knowledge is assumed to save time and resources.

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“…13–15 Among the different types of mixed surfactant systems, cationic/nonionic surfactant mixtures are an important class from both a fundamental and a practical point of view. 16,17 Cationic surfactants, such as the numerous quaternary ammonium compounds with structural modifications, added with nonionic surfactants, result in better performance characteristics in mixed systems due to their mutual promotion effects. 18 Nonionic surfactants based on polyoxyethylene are widely used as a model to study the synergistic effects of mixed systems 19,20 and have a proposed interaction mechanism.…”

Section: Introductionmentioning

confidence: 99%

Synergism and properties of binary mixtures based on an arginine dodecyl ester surfactant

Song

Gao

et al. 2022

New J. Chem.

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Aqueous two-phase systems containing imidazolium ionic liquids and a Tween surfactant

Cited by 14 publications

References 16 publications

Measurement and Correlation of Phase Equilibria in Aqueous Two-Phase Systems Containing Polyoxyethylene Cetyl Ether and Three Organic Salts at Different Temperatures

Measurement and Correlation of Phase Equilibria in Aqueous Two-Phase Systems Containing Polyoxyethylene Cetyl Ether and Three Organic Salts at Different Temperatures

Setting the Foundations of Aqueous Three‐Phase Systems (A3PS) in the Quest for a Rational Design

Synergism and properties of binary mixtures based on an arginine dodecyl ester surfactant

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