Adsorption of the Cationic Surfactant Cetyltrimethylammonium Bromide to Silica in the Presence of Sodium Salicylate: Surface Excess and Kinetics

被引：21
|
作者：
Howard, Shaun C. [1 ]
Craig, Vincent S. J. [1 ]
机构：
[1] Australian Natl Univ, Dept Appl Math, Res Sch Phys & Engn, Canberra, ACT 0200, Australia
来源：
LANGMUIR | 2009年 / 25卷 / 22期
基金：
澳大利亚研究理事会;
关键词：
QUARTZ-CRYSTAL MICROBALANCE; HEXADECYLTRIMETHYLAMMONIUM BROMIDE; STRUCTURAL ARRANGEMENTS; AQUEOUS INTERFACE; PLASMON RESONANCE; MICELLAR-SOLUTION; LIQUID INTERFACE; WATER INTERFACE; BINDING; CTAB;
D O I：
10.1021/la901889m
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The adsorption of cetyltrimethylammonium bromide (CTAB) to silica in the presence of sodium salicylate has been investigated using atomic force microscopy, optical reflectometry, and a quartz crystal microbalance. Salicylate is Found to have a dramatic influence oil surface adsorption ill terms of the kinetics, surface excess, structure of adsorbed aggregates and the mechanical rigidity of the adsorbed Film, This is consistent with the bulk solution behavior of more concentrated CTAB-salicylate solutions and reflects the higher local concentration induced by adsorption to the silica surface. Slow adsorption kinetics are found over a wide range of concentrations below the critical micelle concentration.
引用
收藏
页码：13015 / 13024
页数：10
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