Temperature dependence of viscosity for room temperature ionic liquids

Okoturo, O.O.; VanderNoot, T.J.

doi:10.1016/j.jelechem.2003.12.050

Cited by 375 publications

(315 citation statements)

References 48 publications

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“…Generally, ILs are described in the literature as Newtonian fluids. [42][43][44][45] Nevertheless, non-Newtonian behaviors have already been reported for some AILs [46][47][48] 49,50 Non-Newtonian shear thinning phenomena have recently been described in several PILs by Burrell et al 50 In this paper, Burrell et al have also investigated the effect of water on this property, and they showed that by increasing the water concentration the rheological behavior of the (PIL þ water) binary system changes from non-Newtonian shear thinning, to Newtonian, to non-Newtonian shear thickening behaviors. 50 More recently, a publication of Guo and Guo reports also that ionic liquid induced structure transition of nonionic wormlike micelles composed of Tween 80 and Brij 30.…”

Section: ' Introductionmentioning

confidence: 99%

Physico-Chemical Properties of Non-Newtonian Shear Thickening Diisopropyl-ethylammonium-Based Protic Ionic Liquids and Their Mixtures with Water and Acetonitrile

Jacquemin

Anouti²,

Lemordant³

2011

J. Chem. Eng. Data

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General rights Copyright for the publications made accessible via the Queen's University Belfast Research Portal is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights. ABSTRACT: New protic ionic liquids (PILs) based on the diisopropyl-ethylammonium cation have been synthesized through a simple and atom-economic neutralization reaction between the diisopropyl-ethylamine and selected carboxylic acid. Densities and rheological properties were then measured for two original diisopropyl-ethylammonium-based protic ionic liquids (heptanoate and octanoate) at 298.15 K and atmospheric pressure. The effect of the presence of water or acetonitrile on the measured values was also examined over the whole composition range at 298.15 K and atmospheric pressure. From these values, excess properties were calculated and correlated by using a Redlich-Kister-type equation. Finally, a qualitative analysis of the evolution of studied properties with the alkyl chain length of the anion and with the presence or not of water (or acetonitrile) was performed. From this analysis, it appears that selected PILs and their mixtures with water or acetonitrile have a non-Newtonian shear thickening behavior, and the addition of water or acetonitrile on these PILs increases this phenomena by the formation of aggregates in these media.

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Section: ' Introductionmentioning

confidence: 99%

Physico-Chemical Properties of Non-Newtonian Shear Thickening Diisopropyl-ethylammonium-Based Protic Ionic Liquids and Their Mixtures with Water and Acetonitrile

Jacquemin

Anouti²,

Lemordant³

2011

J. Chem. Eng. Data

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“…Viscosity-temperature dependence is commonly described by the Arrhenius equation (for non-associating electrolytes) [33] or by the Vogel-Tamman-Fulcher (VTF) equation (commonly used for glass forming RTILs) [34,35]. In our case, obtained plots were not accurately described by either Arrhenius or VTF models and, as already reported in other papers, such behaviour is usual for ionic liquids whose cations are less symmetric and have high molar mass [36].…”

Section: Cu(ii) Extraction In Ionic Liquidsmentioning

confidence: 42%

Cu(II) Extraction in Ionic Liquids and Chlorinated Solvents: Temperature Effect

Germani¹,

Mancini²,

Spreti

et al. 2011

GSC

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Room temperature ionic liquids have been currently used in liquid/liquid extraction processes in order to substitute conventional organic solvents. In this paper, a series of chlorinated solvents and 1-alkyl-3-methylimidazolium-based ionic liquids were selected to study the extraction efficiency of a lipophilic polyamine 1,1,7,7-tetraethyl-4-tetradecyldiethylenetriamine (TE14DT) towards the model ion Cu(II) in such different media. The effect of temperature on the extraction efficiency was also investigated. The metal ion partition was found to be strongly dependent on both the nature of the solvent and on the working temperature. The viscosity of ionic liquids and the water content in ionic liquid were found to affect the extraction efficiency of TE14DT. The chemical nature of the cation of ionic liquids, and in particular the alkyl chain length on imidazolium ring, also seemed to be important in determining the efficiency of the extraction process. Finally, preliminary experiments on back-extraction of Cu(II) ions from ionic liquid also revealed interesting hints to the development of a continuous transport process.

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“…[47] Several authors performed MD simulations of imidazolium-based ILs using nonpolarizable force field and discussed the possible influence of polarizability. [31,48,49] Nevertheless, there is no other work dealing with polarizable force field of BMIMPF 6 we can compare with.…”

Section: Resultsmentioning

confidence: 99%

“…In this work a nonequilibrium molecular dynamics (NEMD) was used to investigate temperature dependence of viscosity of relatively highly viscous BMIMPF 6 in the temperature range from 360 to 480 K. The NEMD is a standard method to determine shear viscosities and has been extensively applied to simple fluids or more rarely to polar liquids.…”

Section: T /(K)mentioning

confidence: 99%

Shear viscosity of ionic liquids from non-equilibrium molecular dynamics simulation

Picálek

2009

Molecular Simulation

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Temperature dependence of viscosity for room temperature ionic liquids

Cited by 375 publications

References 48 publications

Physico-Chemical Properties of Non-Newtonian Shear Thickening Diisopropyl-ethylammonium-Based Protic Ionic Liquids and Their Mixtures with Water and Acetonitrile

Physico-Chemical Properties of Non-Newtonian Shear Thickening Diisopropyl-ethylammonium-Based Protic Ionic Liquids and Their Mixtures with Water and Acetonitrile

Cu(II) Extraction in Ionic Liquids and Chlorinated Solvents: Temperature Effect

Shear viscosity of ionic liquids from non-equilibrium molecular dynamics simulation

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