SDS／环己烷／正丁醇／水微乳体系相行为的研究

采用电导率曲线讨论了加水稀释过程中，体系由W／O型一双连续型一0／w型的微观结构转变。25℃时，绘制了十二烷基硫酸钠（SDS）／正丁醇／环己影水体系在不同w值（水和SDS的摩尔比）时的相图，得出该体系能形成W／O微乳液的配比为：正丁醇的质量分数在20％-60％，环己烷的质量分数在0—80％．该体系在室温下能够形成较大范围的W／O单相微乳液区，w值对微乳区的面积和所在的位置无太大的影响；W=20时绘制了不同温度下的微乳液相图，结果表明：当温度升高时微乳区明显减小，且总体上有远离S（水＋SDS相）角的趋势，此时增大醇的用量有助于微乳液的形成。

The Rule of Phases Changing in Sodium Dodecyl Sulfate(SDS)/Cyclohexane/N-Butanol/Water System

Based on the measurement of the electrical conductance of the system ,it was observed that during the dilution of the system with water,the micro-structure of the system transforms from W/O to bicontinuous phase,and o/W subsequently. Phase diagrams of sodium dodeeyl sulfate （ SDS）/n-butanoL/cyclohexane/water microemulsion system with different W（ratio of water to SDS） at 25℃ were established. The appropriate mass fraction for the formation of microemulsion are/n-butanol 20% -60% and cyclohexane 0- 80% . The system can form W/O mono-phase microemulsion region of rather wide range at room temperature. The impact of W on the area and position of miememulsion region is not significant;Phase diagrams of microemulsion system with different temperature at W = 20 were established. It shows that microemulsion region have a large impact of temperature and run away the S phase, At this time increased n-butano consumption contribute to the formation of microemulsion.