Measurement of high-pressure densities and atmospheric viscosities of ionic liquids: 1-hexyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide and 1-Hexyl-3-methylimidazolium chloride

Masayuki Iguchi, Yuya Hiraga, Yoshiyuki Sato, Taku Michael Aida, Masaru Watanabe, Richard L. Smith

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37 Citations (Scopus)

Abstract

Atmospheric densities and viscosities of ionic liquids, 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C 6C1Im][Tf2N]) and 1-hexyl-3-methylimidazolium chloride ([C6C1Im][Cl]), were measured with a Stabinger viscometer at temperatures from (293 to 373) K. High-pressure densities (p ≤ 200 MPa) for [C6C1Im][Tf2N] and [C 6C1Im][Cl] were measured with a bellows type apparatus at temperatures from (312 to 452) K. Samples were analyzed for the water and 1-methylimidazole content before and after the measurements. For [C 6C1Im][Tf2N], combined expanded uncertainties were estimated to be (1.0 and 1.8) kg·m-3 for atmospheric and high-pressure density, respectively, and 0.85 % for viscosity. For [C 6C1Im][Cl], combined expanded uncertainties were estimated to be (1.1 and 2.5) kg·m-3 for atmospheric and high-pressure density, respectively, and 1.59 % for viscosity. The measured densities and viscosities of [C6C1Im][Tf2N] in this work agreed with some of the available literature values within their experimental uncertainties. The effect of colored impurities and the source of sample on densities and viscosities of [C6C1Im][Cl] were determined to be less than the experimental uncertainties. The [C6C 1Im][Tf2N] did not decompose over the full temperature range during the measurements, while [C6C1Im][Cl] decomposed at temperatures greater than 392 K.

Original languageEnglish
Pages (from-to)709-717
Number of pages9
JournalJournal of Chemical and Engineering Data
Volume59
Issue number3
DOIs
Publication statusPublished - 2014 Mar 13

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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