The surface tensions of aqueous solutions of sodium lauryl ether sulfate (SLES), ethanol, acetonitrile, 1-propanol and 2-propanol were individually measured using the pendant drop technique. Then, the surface tensions and critical micelle concentrations of the mixed aqueous solutions of (SLES + additives) were then measured at different concentrations of species for the first time. All measurements were conducted at the temperature of 298.15 K. In addition, a thermodynamic model was presented for accurately predicting of the surface tensions of the mixtures and the surface coverage of the surfactant in the mixture with the average absolute deviation of 1.45 %. Furthermore, an increase in the SLES concentration led to a higher surface coverage, although the presence of an additive caused a slight decrease in the surface coverage of SLES and an increase in the critical micelle concentration of the mixtures.

中文翻译：

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月桂基醚硫酸钠、添加剂及其混合物水溶液的表面行为：实验和建模研究

使用悬滴技术分别测量月桂基醚硫酸钠 (SLES)、乙醇、乙腈、1-丙醇和 2-丙醇水溶液的表面张力。然后，首次测量了（SLES+添加剂）混合水溶液在不同浓度下的表面张力和临界胶束浓度。所有测量均在 298.15 K 的温度下进行。此外，还提出了一个热力学模型，用于准确预测混合物的表面张力和混合物中表面活性剂的表面覆盖率，平均绝对偏差为 1.45%。此外，SLES 浓度的增加导致更高的表面覆盖率，