DTAB-月桂酸钠体系表面活性剂双水相研究

绘制和分析了十二烷基三甲基溴化铵（DTAB） 月桂酸钠（SL）组成的表面活性剂混合体系相图,系统研究了温度和无机盐等因素对该体系表面活性剂双水相 (ASTP) 影响的规律性.结果表明:与富含负离子表面活性剂双水相 (ASTP A) 相比较,富含正离子表面活性剂双水相(ASTP C)区域更大、更稳定；温度升高，无机盐(NaBr)的浓度增大，都引起 ASTP 体系上相体积的减小和下相体积的增加；囊泡普遍存在于ASTP的上下相之中.

Study on the Aguous Surfactant Two-Phase of DodecyltrimethylammoniumBromide (DTAB ) -Sodium Lau rate (SL) Mixed System

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.