双生表面活性剂微乳液的制备及其相行为研究

制备了双生表面活性剂α-磺基硬脂酸聚乙二醇双酯钠盐/醇/正辛烷/水微乳液体系,绘制了其拟三元相图,探讨了不同碳链长度的醇及0.1mol/LKCl、NaOH、HCl溶液对微乳区域的影响,利用电导率分析了微乳液的结构类型。结果表明:以α-磺基硬脂酸聚乙二醇双酯钠盐作为乳化剂,可以制备稳定的微乳液。在中等链长范围内,作为助表面活性剂的醇类,链长的比链短的醇具有更好的助活作用。电解质溶液一般使微乳区域缩小,以电解质溶液或纯水为分散介质的微乳液的电导率变化趋势基本相同。

Preparation and Phase Behavior of Microemulsion of Gemini Surfactant

The microemulsion of the gemini surfactant/alcohol/alkane/water system was prepared using sodium α-sulfonated stearic acid polyethyleneglycol diester.The pseudo-ternary phase diagrams were constructed.The influence of various alcohols with different carbon chain length 0.1 mol/L KCl,NaOH and HCl on the microemulsion was investigated.Furthermore,the structure of microemulsion was analyzed with its conductivity.The results showed that stable microemulsion could be prepared with sodium α-sulfonated stearic acid polyethyleneglycol diester as emulsifier.For auxiliary surfactant,the increase of carbon length was of advantage to formation and stabilization of the microemulsions within middle range.In general,the microemulsion area was shrinked in electrolyte solution.The trend of conductivity change of the microemulsion in electrolyte solution and water was similar.