Thermodynamic properties of DBN-based ionic liquids and their binary mixtures with primary alcohols

被引:4
作者
Shi, Yunlan [1 ]
Liu, Shuhui [1 ]
Wang, Shuhui [2 ]
Yu, You [1 ]
Chen, Xin [3 ]
Zhu, Xiao [1 ]
机构
[1] Qufu Normal Univ, Sch Chem & Chem Engn, Qufu 273165, Peoples R China
[2] Jining Yucai High Sch, Jining 272100, Peoples R China
[3] Henan Univ, Coll Chem & Chem Engn, Kaifeng 475001, Peoples R China
基金
中国国家自然科学基金;
关键词
Ionic liquid; Alcohol; Density; Viscosity; Electrical conductivity; Excess properties; 1-ETHYL-3-METHYLIMIDAZOLIUM METHYLSULFATE; PHYSICOCHEMICAL PROPERTIES; THERMOPHYSICAL PROPERTIES; MOLECULAR-SOLVENTS; EXCESS PROPERTIES; VISCOSITY; DENSITY; CONDUCTIVITY; WATER;
D O I
10.1016/j.molliq.2022.121060
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Two novel azole-based ionic liquids, including [HDBN][Im] and [HDBN][Tri], prepared from 1,5diazabicyclo [4.3.0] non-5-ene (DBN) with imidazole (Im) or 1,2,4-triazole (Triz) were synthesized. The density and viscosity of the pure ionic liquids and their binary mixtures with methanol, ethanol, isopropanol and n-butanol were measured at temperature ranging from T= (298.15 to 313.15) K. The molecular volume, standard entropy, thermal expansion coefficients and lattice energy of pure ionic liquids were deduced from the experimental density results. The temperature dependence of the viscosity was fitted well by Vogel-Fulcher-Tammann equation and fluidity equation. The estimated values of the activation energy En for viscous flow was obtained by Arrhenius empirical equation. Activation thermodynamic functions for viscous flow including AG', AH', AU' and AS' of [HDBN][Im] and [HDBN][Tri] were calculated by Eyring viscosity equation. And the relationship between the dynamic viscosity and the molar conductivity of ILs was discussed in terms of WaldenMODIFIER LETTER PRIMEs rule. In addition, excess molar volumes VE, viscosity deviations An, relative viscosity nr, excess viscosity nE and the excess Gibbs energy of activation for viscous flow AG*E for the ILs + alcohol binary mixtures were also obtained from experimental data of densities p and viscosities n of mixtures and fitted to the Redlich-Kister equation. (c) 2022 Elsevier B.V. All rights reserved.
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页数:15
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