OP-10拟三元体系微乳区域相图研究

Study on the Quasi-Ternary Phase Diagram of OP-10 Microemulsion Region

摘要: 实验绘制了一系列辛烷基酚聚氧乙烯醚(OP-10) + 醇(正丁醇、异戊醇或正辛醇) + C₆H₁₂ + 水(CaCl₂水溶液)拟三元体系相图，分别研究了醇的添加比例及CaCl₂溶液浓度对微乳区域的影响，发现在纯水的相图中，随着OP-10与正丁醇、异戊醇或正辛醇的质量比逐渐增大，拟三元体系中微乳区的相对面积先增大，后减小；当OP-10:正丁醇 = 1.5:1，OP-10:异戊醇 = 2:1，OP-10:正辛醇 = 2.5:1时，微乳区的相对面积最大。在CaCl₂水溶液相图中，三种醇微乳区相对面积总体上呈现先增大后减小的变化趋势，且添加不同醇对微乳区相对面积的影响也不同，其中微乳区面积最大时的正丁醇、异戊醇和正辛醇体系所对应的CaCl₂浓度分别为0.1 mol/L、0.5 mol/L和0.1 mol/L。该研究对于拟三元体系相图的绘制、微乳液的配制和微乳法制备纳米材料具有重要的参考价值。

Abstract: A series of quasi ternary phase diagrams of alkyl phenol polyoxyethylene ether (OP-10) + alcohols (n-butanol, isopentyl alcohol or n-octanol) + n-hexane + water (calcium chloride aqueous solution) system have been drawn based on experiments. We investigated the influence of cosurfactant alcohol with different addition and CaCl₂ solution with different molar concentrations on the microemulsion region respectively. In pure water quasi-ternary phase diagram, we found that the relative area of microemulsion region in the ternary system increases at the beginning and then decreases with the mass ratios of OP-10 and cosurfactant n-butanol, isopentyl alcohol or n-octanol increase. When the OP-10:n-butanol = 1.5:1, OP-10:isopentyl alcohol = 2:1, and OP-10:n-octanol = 2.5:1, it has the largest area of microemulsion region. In general, the change tendency of microemulsion region relative areas increased at the beginning and then decreased in calcium chloride aqueous solution quasi-ternary phase diagram. The influence of relative area of microemulsion region is also different from adding different alcohols. Among them, the concentrations of CaCl₂ with the largest relative area of microemulsion region corresponding to n-butanol, isopentyl alcohol, and n-octanol are 0.1 mol/L, 0.5 mol/L and 0.1 mol/L respectively. This study has important reference value for the drawing of quasi-ternary phase diagram, preparation of microemulsion and synthesis of nanomaterials by microemulsion method.