Viscosity minima in binary mixtures of ionic liquids plus molecular solvents

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Abstract

The viscosity (eta) of four binary mixtures ( ionic liquids plus molecular solvents, ILs+MSs) was measured in the 283.15 <T/K <363.15 temperature range. Different IL/MS combinations were selected in such a way that the corresponding eta(T) functions exhibit crossover temperatures at which both pure components present identical viscosity values. Consequently, most of the obtained mixture isotherms, eta(x), exhibit clear viscosity minima in the studied T-x range. The results are interpreted using auxiliary molecular dynamics (MD) simulation data in order to correlate the observed eta(T, x) trends with the interactions in each mixture, including the balance between electrostatic forces and hydrogen bonding.

Original languageEnglish
Pages (from-to)13480-13494
Number of pages15
JournalPhysical Chemistry Chemical Physics
Volume17
Issue number20
DOIs
Publication statusPublished - 2015

Keywords

  • ALKYL CHAIN-LENGTH
  • MO AB-INITIO
  • PHYSICOCHEMICAL PROPERTIES
  • AQUEOUS-SOLUTIONS
  • TEMPERATURE
  • IMIDAZOLIUM
  • DENSITIES
  • PHASE
  • 2-AMINOETHANOL
  • WATER

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