从大表面活性剂胶束到低界面张力:一种适用于聚氧乙烯单十二烷基醚-碳氢化合物体系的配方原理

Y.C. Chiu, S.J. Wang
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引用次数: 5

摘要

提出了一种在表面活性剂配方中实现低界面张力的方法。在水表面活性剂溶液中发现了100 nm左右的大表面活性剂胶束,在油水界面之间产生超低张力。用旋滴仪测定了非离子型表面活性剂-碳氢化合物体系的动态界面张力随时间的变化。聚氧乙烯单十二烷基醚系列(C12H26O(CH2CH2O)xH)。x = 3 - 6,8)和一系列碳氢化合物(C8-C15)用于实验。采用He-Ne激光动态光散射技术对表面活性剂胶束尺寸进行了测量。在纺丝速率为2000 rev min−1、表面活性剂浓度为0.024%的条件下,界面张力的降低过程似乎是通过扩散控制的增溶机制实现的。提出了在表面活性剂配方中建立具有增溶作用的大表面活性剂胶束是实现低界面张力的途径之一。
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From large surfactant micelle to low interfacial tension: A formulation principle applied to polyoxyethylene mono-n-dodecyl ether—hydrocarbon systems

This paper presents a method for achieving low interfacial tension in surfactant formulation. Large surfactant micelles of sizes around 100 nm were found in aqueous surfactant solutions yielding ultralow tension between an oil—water interface. The dynamic interfacial tensions of the non-ionic surfactant—hydrocarbon systems were measured as a function of time with a spinning drop apparatus. A series of polvoxyethylene mono-n-dodecyl ethers (C12H26O(CH2CH2O)xH.x = 3—6,8) and a series of hydrocarbons (C8—C15) were used in the experiments. The surfactant micelle size was measured by the dynamic light scattering technique using an He—Ne laser. At a spinning rate of 2000 rev min−1 and a surfactant concentration of 0.024%, the process of lowering the interfacial tension seems to undergo a diffusion-controlled solubilization mechanism. It is suggested that one way of achieving low interfacial tension is to build up large surfactant micelles which are effective in solubilization, in the surfactant formulation.

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