Zhang Zhi-Guo, Yin Hong
Department of Chemical Engineering, Zhejiang University, Hangzhou 310027, China.
J Zhejiang Univ Sci B. 2005 Jun;6(6):597-601. doi: 10.1631/jzus.2005.B0597.
The interaction in two mixtures of a nonionic surfactant AEO9 (C12H25O(CH2CH2O)9H) and different ionic surfactants was investigated. The two mixtures were AEO9/sodium dodecyl sulfate (SDS) and AEO9/cetyltrimethylammonium bromide (CTAB) at molar fraction of AEO9, alpha(AEO9) The surface properties of the surfactants, critical micelle concentration (CMC), effectiveness of surface tension reduction (gamma(CMC)), maximum surface excess concentration (Gamma(max)) and minimum area per molecule at the air/solution interface (A(min)) were determined for both individual surfactants and their mixtures. The significant deviations from ideal behavior (attractive interactions) of the nonionic/ionic surfactant mixtures were determined. Mixtures of both AEO9/SDS and AEO9/CTAB exhibited synergism in surface tension reduction efficiency and mixed micelle formation, but neither exhibited synergism in surface tension reduction effectiveness.
研究了非离子表面活性剂AEO9（C12H25O(CH2CH2O)9H）与不同离子表面活性剂的两种混合物中的相互作用。这两种混合物分别是AEO9/十二烷基硫酸钠（SDS）和AEO9/十六烷基三甲基溴化铵（CTAB），其中AEO9的摩尔分数为α(AEO9)。测定了单个表面活性剂及其混合物的表面性质，包括临界胶束浓度（CMC）、表面张力降低效率（γ(CMC)）、最大表面过剩浓度（Gamma(max)）和空气/溶液界面处每个分子的最小面积（A(min)）。确定了非离子/离子表面活性剂混合物与理想行为的显著偏差（吸引相互作用）。AEO9/SDS和AEO9/CTAB混合物在表面张力降低效率和混合胶束形成方面均表现出协同作用，但在表面张力降低效果方面均未表现出协同作用。
