【摘要】 对以正十六烷、油酸钾、正己醇和水所组成的微乳液进行研究,对其流变性和机理作了探讨.微乳液粘度和水油比变化的关系可用相转化来说明.层形结构区显示出有高粘度特征,并具有明显的负触变性现象.对此进行了讨论,并研究了pH值和盐类的影响.更多还原

【Abstract】 Microemulsion, which are optically transparent oil-water dispersion were sponta neously produced upon mixing hexadecane, hexanol, potassium oleate, and water in specific proportions. The viscosity of microemulsions was measured for several water/oil ratios. The striking optical and viscosity changes observed at specific water/oil ratios were in agreement with the proposed mechanism of phase inversion, namely, water spheres→water cyclinder→water lamellae→continuous water phase, for this system. In the lamellae region, the dispersion exhibited negative thixotropic and shear thicken properties. The bizarre rheological properties exhibited by the dispersion with water/oil ratios of 1 were explained in terms of ion-dipole association between oleate and hexanol molecules on adjacent dropletes, which was investigated as a function of pH, ratios of water and added salts.更多还原