物理化学学报 >> 2007, Vol. 23 >> Issue (11): 1657-1661.doi: 10.3866/PKU.WHXB20071101

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离子液体[BMim]BF4对SDS水溶液表面活性和聚集能力的促进

雷声; 张晶; 黄建滨   

  1. 北京大学化学与分子工程学院, 分子动态与稳态结构国家重点实验室, 北京分子科学国家实验室, 北京 100871
  • 收稿日期:2007-07-17 修回日期:2007-08-22 发布日期:2007-11-01
  • 通讯作者: 黄建滨 E-mail:JBHuang@pku.edu.cn

Promotion of the Surface Activity and Aggregation Ability of Sodium Dodecylsulfate in Aqueous Solution by Ionic Liquid 1-butyl-3-methyl-imidazolium Tetrafluoroborate

LEI Sheng; ZHANG Jing; HUANG Jian-Bin   

  1. Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
  • Received:2007-07-17 Revised:2007-08-22 Published:2007-11-01
  • Contact: HUANG Jian-Bin E-mail:JBHuang@pku.edu.cn

摘要: 采用表面张力测定法和核磁共振谱等方法研究了阴离子表面活性剂十二烷基硫酸钠(SDS)在水溶性室温离子液体[BMim]BF4/水混合溶剂中的表面性质及聚集行为, 发现极少量[BMim]BF4的介入就可以显著降低SDS的临界胶束浓度, 提高体系的表面活性; 且[BMim]BF4在混合溶剂中所占的摩尔分数(x1)在一定范围内(0

关键词: 离子液体, 混合溶剂, 十二烷基硫酸钠, 临界胶束浓度, 表面活性

Abstract: The surface property and aggregation behavior of an anionic surfactant, sodium dodecylsulfate (SDS), in a mixed solvent of a water-soluble room temperature ionic liquid 1-butyl-3-methyl-imidazolium tetrafluoroborate ([BMim]BF4) and water were investigated by means of surface tension measurements and nuclear magnetic resonance (NMR) spectroscopy. It was found that the critical micelle concentration (cmc) of SDS could be remarkably reduced and the surface activity of the system was enhanced by the addition of a small amount of [BMim]BF4. Moreover, the surface activity and aggregation ability of SDS aqueous solution could be promoted when the molar fraction of [BMim]BF4 in the mixed solvent (x1) was at the range of 0-0.0458. This promotion function was most efficient at x1=0.0018.

Key words: Ionic liquids, Mixed solvent, SDS, Critical micelle concentration, Surface activity

MSC2000: 

  • O648