关键词:

W/O微乳液, 反胶团, 拟三元相图, 纳米硫酸钡

Abstract: The phase diagrams of water-in-oil microemulsions are very important for preparation of nano-sized BaSO₄ particles. In this work, the influences of temperature, surfactant and surfactantaid, salinity and composition of oil phase on stability of microemulsions systems (Triton X-100/n-hexanol/cyclohexane/water )were investigated by measuring the electric conductivity and formation of liquid crystal,while some quasi-ternary phase diagrams were drawn.It was found that the ratio of surfactantaid and surfactant had a significant effect on stability of microemulsions. With increasing temperature, the region of microemulsions in phase diagrams became smaller, which could be used for breaking the microemulsions.The mixture with a small amount of n-hexanol in cyclohexane was better than pure cyclohexane. This work provided the basic data for the preparation of BaSO4 using W/O microemulsions.

Key words:

W/O微乳液, 反胶团, 拟三元相图, 纳米硫酸钡