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

›› 2008, Vol. 16 ›› Issue (2): 256-262.

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

State Key Laboratory of Chemical Engineering and Department of Chemistry, East China University of Science and Technology, Shanghai 200237, China

收稿日期:2007-06-20 修回日期:2007-10-03 出版日期:2008-04-28 发布日期:2008-04-28
通讯作者: PENG Changjun,E-mail:cjpeng@ecust.edu.cn
基金资助:
the National Natural Science Foundation of China(20476025,20776040);Shanghai Municipal Science and Technology Commission of China(05DJ14002);Hubei Key Laboratory of Novel Chemical Reactor and Green Chemical Technology of China(XLHX2007002)

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

GENG Yanfang, WANG Tengfang, YU Dahong, PENG Changjun, LIU Honglai, HU Ying

State Key Laboratory of Chemical Engineering and Department of Chemistry, East China University of Science and Technology, Shanghai 200237, China

Received:2007-06-20 Revised:2007-10-03 Online:2008-04-28 Published:2008-04-28
Supported by:
the National Natural Science Foundation of China(20476025,20776040);Shanghai Municipal Science and Technology Commission of China(05DJ14002);Hubei Key Laboratory of Novel Chemical Reactor and Green Chemical Technology of China(XLHX2007002)

摘要/Abstract

摘要： Viscosities and densities for 1-butyl-3-methylimidazolium hexafluorophosphate([C₄mim][PF₆])+N,N-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.

关键词: ionic liquid, N,N-dimethylformamide, density, viscosity, [C₄mim][PF₆], correlation

Abstract: Viscosities and densities for 1-butyl-3-methylimidazolium hexafluorophosphate([C₄mim][PF₆])+N,N-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.

Key words: ionic liquid, N,N-dimethylformamide, density, viscosity, [C₄mim][PF₆], correlation

耿彦芳, 王腾芳, 虞大红, 彭昌军, 刘洪来, 胡英. Densities and Viscosities of the Ionic Liquid[C₄mim][PF₆]+N,N-dimethylformamide Binary Mixtures at 293.15 K to 318.15 K[J]. , 2008, 16(2): 256-262.

GENG Yanfang, WANG Tengfang, YU Dahong, PENG Changjun, LIU Honglai, HU Ying. Densities and Viscosities of the Ionic Liquid[C₄mim][PF₆]+N,N-dimethylformamide Binary Mixtures at 293.15 K to 318.15 K[J]. , 2008, 16(2): 256-262.

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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

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

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