Physicochemical Properties of Glycine-Based Ionic Liquid [QuatGly-OEt][EtOSO3] (2-Ethoxy-1-ethyl-1,1-dimethyl-2-oxoethanaminium ethyl sulfate) and Its Binary Mixtures with Poly(ethylene glycol) (Mw = 200) at Various Temperatures

International Journal of Molecular Sciences

Tzi-Yi Wu⁴  Bor-Kuan Chen¹  Lin Hao⁴  Yuan-Chung Lin²  H. Paul Wang⁵  Chung-Wen Kuo³ 

[1] Department of Materials Engineering, Kun Shan University, Tainan 71003, Taiwan; E-Mail:;Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung 804, Taiwan; E-Mail:;Department of Chemical and Materials Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung 807, Taiwan; E-Mail:;Department of Chemistry, National Cheng Kung University, Tainan 70101, Taiwan; E-Mails:;Department of Environmental Engineering, National Cheng Kung University, Tainan 70101, Taiwan; E-Mail:

关键词: ionic liquids;    density;    viscosity;    refractive index;    excess molar volume;    conductivity;   

DOI  :  10.3390/ijms12128750

来源: mdpi

【 摘 要 】

This work includes specific basic characterization of synthesized glycine-based Ionic Liquid (IL) [QuatGly-OEt][EtOSO₃] by NMR, elementary analysis and water content. Thermophysical properties such as density, ρ, viscosity, η, refractive index, n, and conductivity, κ, for the binary mixture of [QuatGly-OEt][EtOSO₃] with poly(ethylene glycol) (PEG) [M_w = 200] are measured over the whole composition range. The temperature dependence of density and dynamic viscosity for neat [QuatGly-OEt][EtOSO₃] and its binary mixture can be described by an empirical polynomial equation and by the Vogel-Tammann-Fucher (VTF) equation, respectively. The thermal expansion coefficient of the ILs is ascertained using the experimental density results, and the excess volume expansivity is evaluated. The negative values of excess molar volume for the mixture indicate the ion-dipole interactions and packing between IL and PEG oligomer. The results of binary excess property (V_m^E ) and deviations (Δη, Δ_xn, Δ_Ψn, Δ_xR, and Δ_ΨR) are discussed in terms of molecular interactions and molecular structures in the binary mixture.

【 授权许可】

CC BY   
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