期刊
FLUID PHASE EQUILIBRIA
卷 261, 期 1-2, 页码 414-420出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.fluid.2007.06.019
关键词
ionic liquid; electrical conductivity; high pressure
The electrical conductivities (kappa) of the ionic liquids 1-methyl-3-octylimidazolium hexafluorophosphate [OMIM]PF6, and 1-methyl-3octylimidazolium tetrafluoroborate [OMIM]BF4, have been measured between 0 and 80 degrees C and at pressures to a maximum of 196 MPa. The temperature and pressure dependence of the conductivities are well represented by modified Litovitz and Vogel-Fulcher-Tammann (VFT) equations as is the case for the viscosity. The molar conductivity (A) is found to follow the fractional form of the Stokes-Einstein relationship with the viscosity (Lambda T) alpha (T/n)', with t = 0.96 for [OMIM]PF6 and t = 0.94 for [OMIM]BF4, independent of both temperature and pressure. (c) 2007 Elsevier B.V. All rights reserved.
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