Densities and Viscosities of the Ionic Liquid[C4mim][PF6]+N,N-dimethylformamide Binary Mixtures at 293.15 K to 318.15 K

耿彦芳; 王腾芳; 虞大红; 彭昌军; 刘洪来; 胡英

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Densities and Viscosities of the Ionic Liquid[C₄mim][PF₆]+N,N-dimethylformamide Binary Mixtures at 293.15 K to 318.15 K

Updated：2026-01-06

- Densities and Viscosities of the Ionic Liquid[C₄mim][PF₆]+N,N-dimethylformamide Binary Mixtures at 293.15 K to 318.15 K
- Chinese Journal of Chemical Engineering Vol. 16, Issue 2, Pages: 256-262(2008)
- Affiliations：
  
  State Key Laboratory of Chemical Engineering and Department of Chemistry, East China University of Science and Technology,Shanghai,China,200237
- Author bio：
- Funds：
- DOI：
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- Published：2008
- Accepted：
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摘要

Abstract

Viscosities and densities for 1-butyl-3-methylimidazolium hexafluorophosphate([C

mim

]

[PF

]

-dimethylformamide(DMF)binary mixtures have been measured at the temperature range from 293.15 K to 318.15 K.It is shown that the viscosities and densities decrease monotonously with temperature and the content of DMF.Various correlation methods including Arrhenius-like equation

Seddon et al.'s equation

Redlich-Kister equation with four parameters

and other empirical equations were applied to evaluate these experimental data.A model based on an equation of state for estimating the viscosity of mixtures containing ionic liquids were proposed by coupling with the excess Gibbs free energy model of viscosity

which can synchronously calculate the viscosity and the molar volume.The results show that the model gives a deviation of 8.29% for the viscosity

and a deviation of 1.05% for the molar volume when only one temperature-independent adjustable parameter is adopted.The correlation accuracy is further improved when two parameters or one temperature-dependent parameter is used.

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