四乙基四氟硼酸铵在乙腈溶液中的热膨胀性质及黏度行为

Thermal expansion and viscosity behavior for tetraethylammonium tetrafluoroborate in acetonitrile

精确测量超级电容器用季铵盐(四乙基四氟硼酸铵)在乙腈体系中温度为293.15~333.15 K范围内的密度和黏度,计算了一些重要的热力学参数,如热膨胀系数和表观摩尔体积等,并根据Jones-Dole方程分析了黏度数据。结果表明:测定范围内,溶液的密度和黏度都随着盐浓度的增大而增大,随温度的升高而减小;其热膨胀系数随着盐浓度的增大而减小,随着温度的升高而升高。Jones-Dole经验公式也对黏度分析拟合,且相关性很好。

Density,and viscosity of tetraethylammonium tetrafluoroborate （Et4NBF4） in acetonitrile （ACN） were measured at （293.15 to 333.15） K.Some important thermodynamic parameters,such as thermal expansion coefficients and apparent molar volumes of Et4NBF4,were calculated,and the viscosity data were correlated with Jones-Dole equation.The results showed that both densities and viscosities were found to increase with the increasing salt concentration and the values decrease while the temperature increase;the thermal expansion coefficient decreases with the increasing salt concentration and increases with temperature rise;it was also found that the viscosities showed the consistency with the Jones-Dole equation.