Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (11): 1027-1030.doi: 10.3866/PKU.WHXB20011113

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Study on the Aguous Surfactant TwoPhase of Dodecyltrimethylammonium Bromide(DTAB)Sodium Laurate(SL) Mixed System

Gong Yu-Jun;Zhu Bu-Yao;Zhao Guo-Xi   

  1. Institute of Physical Chemistry, Peking University, Beijing 100871;Department of Petrochemical Engineering, Maoming College, Maoming 525000
  • Received:2001-03-07 Revised:2001-05-12 Published:2001-11-15
  • Contact: Gong Yu-Jun

Abstract: The phase behavior diagram has been drawn and analysed in DTAB-SL mixed system and the influences of temperature and inorganic salt upon “aqueous surfactant twophase(ASTP)” have been studied systematically. The results show that ASTP region when cationics is in excess(ASTPC) is larger and stabler than that when anionics is in excess (ASTPA)(to see Fig.1). The higher the temperature and the inorganic salt concentration(NaBr), the less ratio of upper to lower volume( Vup/Vlow) in ASTP system(to see Table 1~2). Vesicles generally existed in upper and lower phases of ASTP.

Key words: Aqueous surfactant twophase(ASTP), Vesicle, Ratio of upper to lower volume, Temperature, Inorganic salt