Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6619330 | Fluid Phase Equilibria | 2018 | 33 Pages |
Abstract
Density, viscosity, refractive index and conductivity of switchable hydrophilicity solvent (SHS) systems (N,N-dimethylbenzylamine (BDMA), water, and carbon dioxide) were measured as a function of molality of BDMAH-bicarbonate salt for the SHS system at temperatures from (283.15-308.15) K. Three empirical equations were successfully applied to correlate the density, viscosity, refractive index, and electrical conductivity of the SHS systems with temperature and BDMAH-bicarbonate salt concentration. From these experimental results, apparent molar volume, limiting partial molar volume, the relative viscosity and viscosity B-coefficients were calculated. The limiting apparent molar volumes (VÏ0) and experimental slopes (Av) derived from the Redlich-Mayer type equation have been interpreted in terms of solute-solute and solute-solvent interactions. In terms of Jones-Dole equation, the viscosity B-coefficients with large positive value and dB/dTÂ <Â 0 were obtained and these facts implied that the BDMAH-bicarbonate salt is water-structure-making.
Related Topics
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Authors
Zhiyuan Ma, Anli Xu, Yongqin Du, Jian Wang, Hongkun Zhao, Guowang Diao, Xuedong Zhu, Xuhong Guo,