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Citation: 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 Physico-Chimica Sinica, ;2017, 33(3): 513-519. doi: 10.3866/PKU.WHXB201610251 shu

Parameters of the Activation of Viscous Flow of Aqueous[C₂mim] [Ala]

College of Chemistry, Liaoning University, Shenyang 110036, P. R. China

Received Date: 13 September 2016
Revised Date: 25 October 2016

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

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.
- Ionic liquid,
- Viscosity of solution,
- Viscosity B-coefficient,
- Activation parameter for viscous flow of solution,
- Transition-state theory
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Parameters of the Activation of Viscous Flow of Aqueous[C₂mim] [Ala]