Experiment and model for the surface tension of amine–ionic liquids aqueous solutions

2014 ◽  
Vol 74 ◽  
pp. 1-6 ◽  
Author(s):  
Pan Zhang ◽  
LeiXia Du ◽  
Dong Fu
Keyword(s):  
Surface Tension ◽  
Ionic Liquids ◽  
Aqueous Solutions

The Density and Surface Tension of Aqueous Solutions of Propionate Ionic Liquids: [C4mim][Pro] and [C6mim][Pro] at Different Temperatures

2016 ◽  
Vol 45 (2) ◽  
pp. 188-199 ◽  
Author(s):  
Jing Tong ◽  
Teng-Fei Chen ◽  
Lin-Fu Wang ◽  
Duo Zhang ◽  
Qi Yang ◽  
...  
Keyword(s):  
Surface Tension ◽  
Ionic Liquids ◽  
Aqueous Solutions ◽  
Different Temperatures

Molecular dynamics simulations of aqueous solutions of ionic liquids

2010 ◽  
Vol 75 (3) ◽  
pp. 333-348
Author(s):  
Karel Matas ◽  
Jiří Kolafa
Keyword(s):  
Molecular Dynamics ◽  
Surface Tension ◽  
Ionic Liquids ◽  
Aqueous Solutions ◽  
Structural Changes ◽  
Positive Charge ◽  
Anomalous Increase ◽  
Alkyl Chains ◽  
Cation Layer ◽  
Dynamics Simulations

We performed a molecular dynamics study of aqueous solutions of ionic liquids 1-butyl-3-methylimidazolium chloride ([BMIM]Cl) and 1-octyl-3-methylimidazolium chloride ([OMIM]Cl) in order to elucidate the anomalous dependence of the surface tension on concentration. We found that cations are placed preferably at the surface with alkyl chains pointing towards vacuum. Anions compensate the surplus of a positive charge on the surface by forming a layer below the cation layer. At lower concentrations the surface tension decreases with concentration. At higher concentrations the surface becomes saturated by cations and the decrease slows down. The decrease of surface tension with concentration is a consequence of the structural changes, although the experimentally observed anomalous increase at even higher concentrations was not reproduced.

scholarly journals Enhancing Artemisinin Solubility in Aqueous Solutions: Searching for Hydrotropes based on Ionic Liquids

2021 ◽  
Vol 534 ◽  
pp. 112961
Author(s):  
Isabela Sales ◽  
Dinis O. Abranches ◽  
Pedro Costa ◽  
Tânia E. Sintra ◽  
Sónia P.M. Ventura ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Aqueous Solutions

scholarly journals Surface Thermodynamics, Viscosity, Activation Energy of N-Methyldiethanolamine Aqueous Solutions Promoted by Tetramethylammonium Arginate

Entropy ◽  
2020 ◽  
Vol 22 (12) ◽  
pp. 1337
Author(s):  
Xiangfeng Tian ◽  
Lemeng Wang ◽  
Pan Zhang ◽  
Dong Fu
Keyword(s):  
Activation Energy ◽  
Surface Tension ◽  
Diffusion Coefficient ◽  
Aqueous Solutions ◽  
Quantitative Relationship ◽  
Viscosity Data ◽  
Surface Thermodynamics ◽  
Surface Entropy ◽  
Operation Conditions ◽  
Surface Enthalpy

The surface tension and viscosity values of N-methyldiethanolamine (MDEA) aqueous solutions promoted by tetramethylammonium arginate ([N1111][Arg]) were measured and modeled. The experimental temperatures were 303.2 to 323.2 K. The mass fractions of MDEA (wMDEA) and [N1111][Arg] (w[N1111][Arg]) were 0.300 to 0.500 and 0.025 to 0.075, respectively. The measured surface tension and viscosity values were satisfactorily fitted to thermodynamic models. With the aid of experimentally viscosity data, the activation energy (Ea) and H2S diffusion coefficient (DH2S) of MDEA-[N1111][Arg] aqueous solution were deduced. The surface entropy and surface enthalpy of the solutions were calculated using the fitted model of the surface tension. The quantitative relationship between the calculated values (surface tension, surface entropy, surface enthalpy, viscosity, activation energy, and H2S diffusion coefficient) and the operation conditions (mass fraction and temperature) was demonstrated.

Surface tension measurements with validated accuracy for four 1-alkyl-3-methylimidazolium based ionic liquids

2010 ◽  
Vol 42 (3) ◽  
pp. 323-329 ◽  
Author(s):  
Jaroslav Klomfar ◽  
Monika Součková ◽  
Jaroslav Pátek
Keyword(s):  
Surface Tension ◽  
Ionic Liquids
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