摘要
在298.1-323.15 K范围内,测定了1-丁基-3-甲基咪唑四氟硼酸盐离子液体（[bmim]BF4）与DMSO混合体系的密度和粘度,研究发现：随着DMSO加入量的增加,混合体系的密度和粘度均减小。在此条件下,计算了此离子液体的粘度活化参数,η∞、Ea、性粘度B-系数及过量对数粘度,结果表明：Ea与DMSO的摩尔分数成线性关系,线性方程为：Ea=-0.836xDMSO＋2.587（r=0.98）,粘度B-系数随温度的升高而减小,[bmim]BF4-DMSO混合体系的过量对数粘度在全组成范围内均为正值。
The densities and viscosities of the mixed system,1-butyl-3-methylimidazolium tetrafluoroborate ionic liquid（ BF4） and DMSO,were measured in the temperature range of 298.15-323.15 K.The results showes that both the density and viscosity of the mixed system decreased with increasing DMSO.The viscosity activation parameters of ionic liquid,such as η∞,Ea,viscosity B-coefficients and excess logarithm viscosity,were calculated.There is a linear relationship between Ea and DMSO molar content,i.e.Ea/kJ·mol^-1=-0.836xDMSO＋2.587（r=0.98）.The viscosity B-coefficients decreases with increasing temperature,and the excess logarithm viscosities of the BF4-DMSO mixed system are all positive in the whole composition range.
出处
《化学世界》
CAS
CSCD
北大核心
2011年第6期331-333,358,共4页
Chemical World
关键词
离子液体
密度
粘度
活化参数
ionic liquid
density
viscosity
activation parameter
