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ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2017,Vol.33>> Issue(3)>> 513-519     doi: 10.3866/PKU.WHXB201610251         中文摘要
Article
Parameters of the Activation of Viscous Flow of Aqueous[C2mim] [Ala]
TONG Jing, LIU Lu, ZHANG Duo, ZHENG Xu, CHEN Xia, YANG Jia-Zhen
College of Chemistry, Liaoning University, Shenyang 110036, P. R. China
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The density and viscosity of aqueous solutions of an ionic liquid (IL) based on alanine,[C2mim] [Ala], with various molalities were measured in the temperature range of T=288.15-328.15 K with intervals of 5 K. From the Jones-Dole equation, a viscosity B-coefficient with a large positive value and dB/dT<0 were obtained. According to Feakins, the contribution of the solute to the activation free energy for viscous flow of the solution, Δμ2≠0, was obtained. The relationship between Δμ2≠0 and temperature was linear, allowing the standard molar activation entropy, ΔS2≠0, and enthalpy, ΔH2≠0, to be obtained. On the basis of Eyring's theory, a new semi-empirical method to estimate the viscosity of aqueous[C2mim] [Ala] was proposed. The values estimated using this method agreed well with the corresponding experimental ones.



Keywords: Ionic liquid   Viscosity of solution   Viscosity B-coefficient   Activation parameter for viscous flow of solution   Transition-state theory  
Received: 2016-09-13 Accepted: 2016-10-25 Publication Date (Web): 2016-10-25
Corresponding Authors: TONG Jing Email: tongjinglnu@sina.com

Fund: The project was supported by the National Natural Science Foundation of China (21273003)

Cite this article: TONG Jing, LIU Lu, ZHANG Duo, ZHENG Xu, CHEN Xia, YANG Jia-Zhen. Parameters of the Activation of Viscous Flow of Aqueous[C2mim] [Ala][J]. Acta Phys. -Chim. Sin., 2017,33 (3): 513-519.    doi: 10.3866/PKU.WHXB201610251

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