Effect of temperature on the aggregation behaviour and thermodynamic properties of surface active ionic liquid 1-decyl-3-methylimidazolium bromide in aqueous solutions: Surface tension, vapour pressure osmometery, conductivity, volumetric and compressibility study

Naderi, Omid; Sadeghi, Rahmat

doi:10.1016/j.jct.2016.06.034

Cited by 29 publications

(9 citation statements)

References 24 publications

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“…Various studies have indicated the presence of micelle formation in aqueous solutions of IL. The thermodynamic properties and micellization behaviour of cationic 1-decyl-3-methylimidazolium bromide in solution and their dependence on temperature have been studied by Naderi and Sadeghi [13]. Kumar and Singh [14] studied the effects of the aromatic ring, counter-ions and alkyl chain length on the critical micelle concentration (CMC) of different IL, namely [C 8 [Cl] in aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, Surface Properties and Micellization Behaviour of Imidazolium‐based Ionic Liquids

Pillai

Pal

2017

J Surfact & Detergents

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Ionic liquids (IL) have emerged as a prospective new material for a wide range of industrial applications, owing to their unique structures and properties. Hence, understanding the structure–property relationships of IL is very important for both fundamental and industrial applications. In this study, a series of imidazolium‐based IL with different chain lengths, namely C8mimBF4, C10mimBF4 and C12mimBF4, were synthesized. Their molecular structures were confirmed by proton nuclear magnetic resonance (1H NMR) and Fourier transform infrared (FTIR) analysis. Thermal gravimetric analysis (TGA) revealed that the IL synthesized were thermally stable in the desired temperature range. Dynamic light scattering (DLS) results of IL was analyzed in order to understand the effect of alkyl length on micellar size. Conductivity and surface tension measurements were carried out to determine the adsorption and aggregation characteristics in aqueous solutions. The influences of temperature as well as alkyl chain length on viscosity were also investigated. Surface adsorption parameters such as surface excess, minimum area, effectiveness and efficiency were also determined from equilibrium surface tension data. A careful analysis of the thermodynamic aspects of air‐ionic liquid aqueous systems reveals that free energies of adsorption are favoured over micellization for all systems.

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Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, Surface Properties and Micellization Behaviour of Imidazolium‐based Ionic Liquids

Pillai

Pal

2017

J Surfact & Detergents

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“…However, by increasing the molality of salts, due to the greater tendency of TBAB alkyl chains to self-aggregate and form micelles, TBAB–BuOH interactions are weaker than the TPAB–BuOH ones and as a result, the salting-in effect of TPAB becomes greater than TBAB. Mostly, the plots of CMC against surfactant concentration have a U-shaped curve so that the CMC values decrease initially with temperature until a minimum point is reached and then they increase with increasing temperature . Therefore, in a certain concentration of salt, aggregation may occur at high temperatures, while it does not occur at low temperatures.…”

Section: Resultsmentioning

confidence: 99%

Liquid–Liquid Demixing Behavior of Aqueous 1-Butanol Solutions in the Presence of Various Organic and Inorganic Ammonium Salts: Effect of Temperature, Cation Alkyl Chain Length, and Anion Type of Salts on Salting Coefficients and Thermodynamic Functions

Keshvarinezhad,

Ebrahimi,

Sadeghi

2023

J. Chem. Eng. Data

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In this work, the effects of various organic and inorganic ammonium salts on the liquid−liquid demixing (clouding) behavior of aqueous 1-butanol (BuOH), as a thermoresponsive material, solutions were investigated in the temperature range of 283.15−353.15 K. The inorganic salts used are NH 4 Cl and NH 4 Br, and the organic ones are tetramethylammonium bromide (TMAB), tetraethylammonium bromide (TEAB), tetrapropylammonium bromide (TPAB), tetrabutylammonium bromide (TBAB), tetrabutylammonium chloride (TBAC), tetrabutylammonium hydrogen sulfate (TBAH), dodecyltrimethylammonium bromide (DTAB), and cetyltrimethylammonium bromide (CTAB). The inorganic ammonium halides reduced the water-solubility of BuOH and induced the salting-out effect. As the concentration of inorganic ammonium salts increased, the strength of the salting-out effect and the area of the biphasic region increased. However, all the investigated tetraalkylammonium salts had the salting-in effect on BuOH and increased its solubility in water. The extent of the monophasic region and also the intensity of the salting-in effect (co-solvency) enhanced with increasing the concentration of the tetraalkylammonium salts. The effects of the charge density of the salt anion as well as the alkyl chain length of the salt cation, on the immiscibility region of aqueous BuOH solutions, were studied. From the correlation of the measured cloud point data with Setschenow's relation, the salting effects occurring in the investigated systems were also quantified. Finally, the values of different thermodynamic functions of phase separation were determined, from which the driving force of clouding at different conditions was discussed.

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“…The obtained CMC values, the degree of counterion dissociation of micelles (g), and the coefficients (A and B) for this work are in reasonable agreement with those of the previous reports. 46,[53][54][55][56] Also, the values of the degree of counterion ionization (g) for SAIL systems decrease from OMI to DOMI with an increase in the alkyl chain length of the components, suggesting an increase in hydrocarbon chain length increased counterion binding around the SAIL micelles. Consequently, it can cause a further reduction of repulsive interaction between the polar head groups (with positive charges).…”

Section: Determination Of the Micellar Parameters Of Sails By Conduct...mentioning

confidence: 99%

The correlation between the micelle morphology of surface-active ionic liquids with self-assembly and thermodynamic characteristics: coarse-grained MD simulation and experiment

Fallah-Totkar,

Bagheri,

Maddah

2023

Phys. Chem. Chem. Phys.

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Effect of temperature on the aggregation behaviour and thermodynamic properties of surface active ionic liquid 1-decyl-3-methylimidazolium bromide in aqueous solutions: Surface tension, vapour pressure osmometery, conductivity, volumetric and compressibility study

Cited by 29 publications

References 24 publications

Synthesis, Characterization, Surface Properties and Micellization Behaviour of Imidazolium‐based Ionic Liquids

Synthesis, Characterization, Surface Properties and Micellization Behaviour of Imidazolium‐based Ionic Liquids

Liquid–Liquid Demixing Behavior of Aqueous 1-Butanol Solutions in the Presence of Various Organic and Inorganic Ammonium Salts: Effect of Temperature, Cation Alkyl Chain Length, and Anion Type of Salts on Salting Coefficients and Thermodynamic Functions

The correlation between the micelle morphology of surface-active ionic liquids with self-assembly and thermodynamic characteristics: coarse-grained MD simulation and experiment

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