Adsorption of alkyltrimethylammonium bromide surfactants at the air/water interface

被引：17
|
作者：
Nguyen, Cuong V. [1 ,3 ]
Nguyen, Thanh V. [2 ]
Phan, Chi M. [1 ]
机构：
[1] Curtin Univ, Dept Chem Engn, Perth, WA 6845, Australia
[2] Univ New South Wales, Sch Chem, Sydney, NSW 2052, Australia
[3] Mil Acad Logist, Dept Petr, Hanoi, Vietnam
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2017年 / 106卷
关键词：
Dynamic adsorption; Surface tension; Trimethylammonium bromide; AIR-WATER-INTERFACE; DYNAMIC ADSORPTION; CATIONIC SURFACTANTS; TENSION; MODEL; LAYER;
D O I：
10.1016/j.ijheatmasstransfer.2016.10.075
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The dynamic behavior of three trimethylammonium bromide surfactants, C(14)TAB, C(15)TAB and C(16)TAB, was studied by a dynamic modeling framework, which consists of the Ward and Tordai equation and an adsorption isotherm. Three adsorption isotherms, Langmuir, Henry and Freundlich, were used separately. The simplest isotherm, Henry isotherm, could not fit experimental data. Freundlich isotherm can model C(15)TAB and C(16)TAB adsorption, but failed to describe C(14)TAB. On the other hand, Langmuir isotherm was able to model all three surfactants. The results confirmed that the adsorption isotherm is monotonic but non-linear for all surfactants. In the other words, the surfactants have not reached the saturation at the CMC. The results also demonstrated a monotonic correlation between carbon length and adsorption effectiveness of the cationic surfactants. The new insights are important for designing new cationic surfactants. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1035 / 1040
页数：6
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