Domańska Urszula, Pobudkowska Aneta, Rogalski Marek
Physical Chemistry Division, Faculty of Chemistry, Warsaw University of Technology, 00-664 Warsaw, Poland.
J Colloid Interface Sci. 2008 Jun 1;322(1):342-50. doi: 10.1016/j.jcis.2008.02.039. Epub 2008 Feb 29.
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, [C6H(13)OCH2MIM][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.
使用环形张力计在大气压下测量了一系列结构相近的离子液体的醇溶液的表面张力，这些离子液体包括：298.15 K下在甲醇、乙醇或正丁醇中的1-甲基-3-甲基咪唑鎓甲基硫酸盐[MMIM][CH₃SO₄]；298.15 K下在甲醇、乙醇或正丁醇中的1-丁基-3-甲基咪唑鎓甲基硫酸盐[BMIM][CH₃SO₄]；298.15 K下在甲醇或正丁醇中的1-丁基-3-甲基咪唑鎓辛基硫酸盐[BMIM][OcSO₄]；308.15 K和318.5 K下在甲醇、正丁醇或正己醇中的1-己氧基甲基-3-甲基咪唑鎓四氟硼酸盐[C₆H₁₃OCH₂MIM][BF₄]、1,3-二己氧基甲基咪唑鎓四氟硼酸盐[(C₆H₁₃OCH₂)₂IM][BF₄]；以及298.15 K下在正辛醇中的己基(2-羟乙基)二甲基溴化铵C₆Br。选择了不同阳离子和阴离子的铵离子液体集合（C₂Br、C₂BF₄、C₂PF₆、C₂N(CN)₂、C₃Br、C₄Br和C₆Br）来研究少量铵离子液体对298.15 K下水的表面张力的影响。测试了阳离子或阴离子烷基链长度对所研究性质（密度和表面张力）产生的影响。
