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Received May 13, 2005
Accepted July 6, 2005
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Surface tension and viscosity of 1-butyl-3-methylimidazolium iodide and 1-butyl-3-methylimidazolium tetrafluoroborate, and solubility of lithium bromide+1-butyl-3-methylimidazolium bromide in water

Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Korea 1Department of Chemical and Biological Engineering, Korea University, 5-1 Anam-dong, Songbuk-gu, Seoul 131-071, Korea 2School of Chemical Engineering and Technology, Yeungnam Univ., 214-1 Tae-dong, Kyongsam City, Gyeongbuk 712-749, Korea
h_lee@kaist.ac.kr
Korean Journal of Chemical Engineering, January 2006, 23(1), 113-116(4), 10.1007/BF02705701
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Abstract

The surface tension and viscosity of 1-butyl-3-methylimidazolium iodide ([bmim][I]) and 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]) were measured over a temperature range of 298. 15 to 323.15 K. It was found that both the viscosity and surface tension decrease with increasing temperature and that the surface tension and viscosity values of [bmim][I] were higher than those of [bmim][BF4]. Additionally, the solubility of lithium bromide (2)+1-butyl-3-methylimidazolium bromide ([bmim][Br]) (3) in water (1) was measured at three different mass ratios (w2/w3=4 and 7, w3=0) by using a visual polythermal method. The solubility of the suggested systems was better than that of lithium bromide in water.

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