EFFECT OF DODECANOL ON MIXED NONIONIC AND NONIONIC/ANIONIC SURFACTANT ADSORPTION AT THE AIR-WATER-INTERFACE

被引：38
|
作者：
STAPLES, EJ [1 ]
THOMPSON, L [1 ]
TUCKER, I [1 ]
PENFOLD, J [1 ]
机构：
[1] RUTHERFORD APPLETON LAB,ISIS SCI DIV,DIDCOT OX11 0QX,OXON,ENGLAND
来源：
LANGMUIR | 1994年 / 10卷 / 11期
关键词：
D O I：
10.1021/la00023a037
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Neutron reflection has been used to investigate the adsorption of mixed nonionic surfactant and nonionic/anionic surfactant mixtures containing dodecanol, at the air/water interface. The measurements clearly demonstrate the preferential adsorption of the more surface active shorter ethylene oxide nonionic surfactants, particularly of dodecanol. The usual trend for the more surface active components to decrease their presence in the surface layer as the total surfactant concentration increases is not observed for dodecanol. This results from the occurrence of unfavorable micellar geometries in mixtures containing dodecanol which control adsorption through their effect on monomer concentration. Regular solution theory cannot be used to describe the behavior of these systems.
引用
收藏
页码：4136 / 4141
页数：6
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