Surface tension of binary mixtures of imidazolium and ammonium based ionic liquids with alcohols, or water: Cation, anion effect

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• 作者：Urszula Domań ; ska ; Aneta Pobudkowska ; Marek Rogalski
• 关键词：Experimental surface tension measurements ; Imidazolium ; or ammonium based ionic liquids + alcohol (methanol ; or 1-butanol ; or 1-hexanol ; or 1-octanol) mixtures ; Molecular interactions ; Surface tension of ammonium ionic liquids water solutions
• 刊名：Journal of Colloid and Interface Science
• 出版年：2008
• 出版时间：1 June 2008
• 年：2008
• 卷：322
• 期：1
• 页码：342-350
• 全文大小：301 K

文摘

The surface tensions were measured at atmospheric pressure, with use of a ring tensiometer, of a series of alcoholic solutions of closely related ionic liquids: 1-methyl-3-methylimidazolium methylsulfate, [MMIM][CH₃SO₄] in alcohol (methanol, or ethanol, or 1-butanol at 298.15 K), 1-butyl-3-methylimidazolium methylsulfate, [BMIM][CH₃SO₄] in alcohol (methanol, or ethanol, or 1-butanol at 298.15 K), 1-butyl-3-methylimidazolium octylsulfate, [BMIM][OcSO₄] in alcohol (methanol, or 1-butanol at 298.15 K) and of 1-hexyloxymethyl-3-methylimidazolium tetrafluoroborate, [C₆H₁₃OCH₂MIM][BF₄], 1,3-dihexyloxymethylimidazolium tetrafluoroborate, [(C₆H₁₃OCH₂)₂IM][BF₄] in alcohol (methanol, or 1-butanol, or 1-hexanol at 308.15 and 318.5 K) and hexyl(2-hydroxyethyl)dimethylammonium bromide, C₆Br in 1-octanol at 298.15 K. The set of ammonium ionic liquids of different cations and anions (C₂Br, C₂BF₄, C₂PF₆, C₂N(CN)₂, C₃Br, C₄Br and C₆Br) was chosen to show the influence of small amount of the ammonium ionic liquid on the surface tension of water at 298.15 K. The influence of the cation, or anion alkyl chain length on the properties under study (densities and surface tension) was tested.