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Citation: ng Yu-Jun, Zhu Bu-Yao, Zhao Guo-Xi. Study on the Aguous Surfactant TwoPhase of Dodecyltrimethylammonium Bromide(DTAB)Sodium Laurate(SL) Mixed System[J]. Acta Physico-Chimica Sinica, ;2001, 17(11): 1027-1030. doi: 10.3866/PKU.WHXB20011113 shu

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

1.
Institute of Physical Chemistry, Peking University, Beijing　100871;Department of Petrochemical Engineering, Maoming College, Maoming 525000

Received Date: 7 March 2001
Available Online: 15 November 2001

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.
- Aqueous surfactant twophase(ASTP);Vesicle;Ratio of upper to lower volume;Temperature;Inorganic salt
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