Stabilization of water soluble surfactants at the air-water interface with Gegenion complexation

被引：14
|
作者：
Stroeve, P [1 ]
VanOs, M [1 ]
Kunz, R [1 ]
Rabolt, JF [1 ]
机构：
[1] IBM CORP, ALMADEN RES CTR, CTR POLYMER INTERFACES & MACROMOL ASSEMBLIES, SAN JOSE, CA 95120 USA
来源：
THIN SOLID FILMS | 1996年 / 284卷
基金：
美国国家科学基金会;
关键词：
polyion complex; Langmuir monolayer; Langmuir-Blodgett films; molecular orientation;
D O I：
10.1016/S0040-6090(95)08305-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study the stability of Langmuir layers of tetradecyl benzoic acid (TDBA) interacting with poly(ethyleneimine) (PEI) in the subphase is analyzed as a function of PEI concentration, PEI molecular weight and surface pressure. Stable Gegenion complex, Langmuir monolayers were obtained in the PEI concentration range of 0.75 to 1.5 mM PEI monomer, and the surface pressure vs. specific area isotherms were independent of the PEI concentration. The isotherms were expanded indicating significant molecular interactions between TDBA and PEI. No effect of the molecular weight of PEI on the isotherms was observed. Outside this concentration range the Gegenion complex, Langmuir monolayers were either unstable or the isotherms were dependent on the PEI concentration, The structure of the Gegenion complex, Langmuir-Blodgett films were investigated using IR spectroscopy.
引用
收藏
页码：200 / 203
页数：4
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