The thermodynamic stability of the microemulsion was inspected by phase diagram method, the radius of the microemulsion droplets were calculated and the W/O zone of the emulsions was confirmed.

• 用相图法分析了微乳液体系的热力学稳定性,计算了水核半径的大小,并考察了影响微乳液W/O区域范围的各种因素。