Colloids and Surfaces Research Laboratory, Faculty of Science and Technology, Al-Quds University, P.O. Box 51000, East Jerusalem, Palestine.
J Colloid Interface Sci. 2010 Mar 15;343(2):496-503. doi: 10.1016/j.jcis.2009.12.008. Epub 2009 Dec 11.
Water/sucrose laurate/ethoxylated mono-di-glyceride/ethanol/peppermint oil microemulsion systems were formulated and characterized using electrical conductivity, dynamic viscosity, nuclear magnetic resonance, dynamic light scattering, small angle X-ray scattering and cryogenic transmission electron microscopy. The solubilization capacity of water in the oil is dependent on the surfactants and ethanol/oil mixing ratios (w/w). Static percolation phenomena were observed in these systems, and the water volume fraction percolation threshold was determined. A progressive transformation of the water-in-oil to bicontinuous and inversion to oil-in-water microemulsions occurs upon dilution with water, which was revealed by the determination of the diffusion coefficients of both oil and water inside the microemulsions. The diffusion coefficients of the surfactants at the interface of the microemulsions increase with increasing water volume fraction. The periodicity of the microemulsions increases linearly with increasing water volume fraction. In addition, the correlation length increases with water volume fraction to a certain value then decreases. Cryo-TEM images of the oil-in-water microemulsions revealed the presence of spheroidal droplets of up to 12 nm diameter.
水/月桂酸蔗糖酯/乙氧基化单-二甘油酯/乙醇/薄荷油微乳液体系采用电导率、动态黏度、核磁共振、动态光散射、小角 X 射线散射和低温透射电子显微镜进行了表征。油中水能的增溶能力取决于表面活性剂和乙醇/油混合比（w/w）。在这些体系中观察到静态渗流现象，并确定了水体积分数渗流阈值。随着水的稀释，油包水微乳液经历了从水包油到双连续相再到油包水的连续相转变，这可以通过测定微乳液内部油和水的扩散系数来揭示。微乳液界面处的表面活性剂扩散系数随水体积分数的增加而增加。微乳液的周期性随水体积分数线性增加。此外，相关长度随水体积分数增加到一定值后减小。水包油微乳液的低温透射电镜图像显示存在直径达 12nm 的球形液滴。
