Viscosity of dimethylbenzene in BmimBF_4 and BmimPF_6 ionic Liquids

摘要

The viscosity of dimethylbenzene and imidazole ionic liquids (1-butyl-3-methylimidazolium tetrafluoroborate [Bmim][BF_4] and 1-butyl-3-methylimidazolium hexafluorophosphate [Bmim][PF_6]) was measured. Within the temperature range from 298.15 K to 308.15 K, the viscosity of the four binary systems decreased sharply as the raise of temperature. The viscosity values decrease slowly in the temperature range from 308.15 K to 338.15 K. The viscosity of dimethylbenzene in the ionic liquids was in sequence: [Bmim][BF_4] < [Bmim][PF_6]. The experimental viscosity values had been correlated using the binary parameters of Vogel-Fulcher- Tamman equation.