SCI和EI收录∣中国化工学会会刊

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

• THERMODYNAMICS AND CHEMICAL ENGINEERING DATA • Previous Articles     Next Articles

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   

  1. 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)

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   

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

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

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