Viscosities at pressures up to 20 MPa and thermal conductivities at 0.1 MPa of 1-alkyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]amides

Daisuke Tomida, Shunsuke Kanno, Kun Qiao, Chiaki Yokoyama

Research output: Contribution to journalArticlepeer-review

Abstract

The density, viscosity and thermal conductivity values are reported for a series of 1-alkyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl] amide compounds, where the alkyl group is butyl ([BMIM][NTf2]), hexyl ([HMIM][NTf2]), or octyl ([OMIM][NTf2]). The densities were measured with a vibrating tube densimeter over the temperature range 293-353 K at pressures up to 20 MPa. The estimated combined standard uncertainty was 0.1%. The viscosities were measured using a rolling-ball viscometer over the temperature range 293-353 K, at pressures up to 20 MPa. The combined standard uncertainty in the viscosity was estimated to be 1.6%. The experimental values were correlated with a hybrid Vogel-Fulcher-Tammann/Tait equation. The thermal conductivities were measured using the transient short hot-wire method over the temperature range 294-354 K, at 0.1 MPa. The combined standard uncertainty in the thermal conductivity was estimated to be 2.2%.

Original languageEnglish
Pages (from-to)231-245
Number of pages15
JournalHigh Temperatures - High Pressures
Volume46
Issue number3
Publication statusPublished - 2017

Keywords

  • Density
  • High pressure
  • Ionic liquid
  • Reference ionic liquid
  • Thermal conductivity
  • Transient short hot-wire method
  • Viscosity

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Physical and Theoretical Chemistry

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