Adsorption isotherm and surface tension equation for a surfactant with changing partial molar area .1. Ideal surface layer
Adsorption isotherm and surface tension equation for a surfactant with changing partial molar area .1. Ideal surface layer
复制标题
DOI：
10.1021/jp960148y
复制
发表时间：
1996-05-02
影响因子：
--
通讯作者：
Makievski, AV
中科院分区：
文献类型：
--
作者：
Fainerman, VB;Miller, R;Makievski, AV
提出了一种吸附模型，该模型假设吸附分子的部分摩尔表面ω取决于吸附层的饱和程度。导出了吸附等温线和表面张力等温线的方程，适用于单一表面活性剂或混合表面活性剂的吸附。该模型假设分子可以在两种不同的状态下吸附，即在较小的表面压力下有较大的，在较大的表面压力下有较小的。用（n- n-十六烷基-n， n-二甲胺）溴化乙酸在空气/溶液界面上的吸附数据证明了该理论的应用。实验结果与模型吻合得很好。
An adsorption model is proposed which assumes a different partial molar surface omega for adsorbed molecules depending on the degree of saturation of the adsorption layer. Equations for an adsorption isotherm and a surface tension isotherm are derived for the adsorption of one single surfactant or of a mixture of surfactants. The model assumes that the molecules may adsorb in two different states, i.e. a large omega at smaller surface pressures Pi and a smaller omega at large surface pressures Pi. Adsorption data of (N-n-hexadecyl-N,N-dimethylammonio)acetic acid bromide at the air/solution interface are used to demonstrate the application of the theory. The experimental results are in very good agreement with the model.