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 dodecyl 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.