Acta Chimica Sinica ›› 2010, Vol. 68 ›› Issue (05): 379-383. Previous Articles     Next Articles

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N-烷基-N-(2-羟乙基)-N,N-二甲基溴化铵与十二烷基硫酸钠复配系统的双水相

王艳玉1,童威1邵爽2,雷群芳*,1,方文军1,林瑞森1   

  1. (1浙江大学化学系 杭州 310027)
    (2浙江教育学院化学系 杭州 310012)
  • 投稿日期:2009-06-30 修回日期:2009-08-17 发布日期:2010-03-14
  • 通讯作者: 雷群芳 E-mail:qflei@zju.edu.cn

Aqueous Two-phase Systems of N-Alkyl-N-(2-hydroxyethyl)- N,N-dimethylammonium Bromide and Sodium Dodecyl Sulfate Mixtures

Wang Yanyu1 Tong Wei1 Shao Shuang2 Lei Qunfang*,1 Fang Wenjun1 Lin Ruisen1   

  1. (1 Department of Chemistry, Zhejiang University, Hangzhou 310027)
    (2Department of Chemistry, Zhejiang Education Institute, Hangzhou 310012)
  • Received:2009-06-30 Revised:2009-08-17 Published:2010-03-14
  • Contact: Qun-Fang LEI E-mail:qflei@zju.edu.cn

Three cationic surfactants, N-dodecyl-N-(2-hydroxyethyl)-N,N-dimethylammonium bromide, N-tetradecyl-N-(2-hydroxyethyl)-N,N-dimethylammonium bromide and N-cetyl-N-(2-hydroxyethyl)-N,N- dimethylammonium bromide have been synthesized. The aqueous two-phase systems of surfactant mixtures from such N-alkyl-N-(2-hydroxyethyl)-N,N-dimethylammonium bromides or N-cetyl-N,N,N-trimethyl- ammonium bromide (CTAB) with sodium dodecyl sulfate (SDS) have been investigated at 313.15 K. The results indicate that two aqueous two-phase regions can be observed in these mixed cationic-anionic surfactant systems. The two regions are nearly symmetric to the equimolar line. With the increase of chain length in the cationic surfactants, the aqueous two-phase regions with abundant cationic surfactants shift slightly to the lower molar ratio of anionic surfactant versus cationic one.

Key words: aqueous two-phase system, cationic/anionic surfactant, quaternary ammonium salt, sodium dodecyl sulfate