Volumetric and viscosity properties of 1-Butylimidazolium acetate ionic liquid/methanol, ethanol or 1-propanol binary mixtures

被引：0
作者：
College of Chemistry & Chemical Engineering, Shaoxing University, Shaoxing [1 ]
312000, China
机构：
[1] College of Chemistry & Chemical Engineering, Shaoxing University, Shaoxing
来源：
Gao Xiao Hua Xue Gong Cheng Xue Bao | / 5卷 / 1038-1044期
关键词：
1-butylimidazolium acetate; Density; Excess molar volumes; Ionic liquid; Viscosity;
D O I：
10.3969/j.issn.1003-9015.2015.05.003
中图分类号：
学科分类号：
摘要：
1-Butylimidazolium acetate ([Bim]Ac) ionic liquid was synthesized, and the structure was characterized by 1H-NMR, 13C-NMR, and IR spectroscopy. Density and viscosity of [Bim]Ac+methanol, [Bim]Ac+ethanol, and [Bim]Ac+1-propanol binary mixtures were measured over an entire range of molar fraction at T=303.15 K under atmospheric pressure using a vibrating U-shaped sample tube densimeter and Ubbelohde Suspended-level viscometer, respectively. Excess molar volumes (VE), apparent molar volumes (Vφi), partial molar volumes (Vm,i), and excess partial molar volumes (Vm,iE of the studied systems were calculated with the density data. Viscosity deviations (Δη) of the studied systems were obtained from the viscosity data. VE and Δη were fitted by Redlich-Kister equation, respectively. The results show that the VE values of the three studied systems are negative over the entire composition range, and a minimum value is reached with mole fraction of [Bim]Ac x1=0.3~0.4. The Δη values of the above-mentioned systems are also negative over the entire composition range, and a minimum value is reached with x1=0.4~0.5. The VE or Δη values of the studied systems follow an order of [Bim]Ac+methanol <[Bim]Ac+ethanol <[Bim]Ac+1-propanol, which indicates that the interaction between [Bim]Ac and alkanol increases with the increase of alkanol polarity. The VE and Δη values can be well fitted with Redlich-Kister equation. ©, 2015, Zhejiang University. All right reserved.
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页码：1038 / 1044
页数：6
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