Influence of the two-dimensional compressibility on the surface pressure isotherm and dilational elasticity of dodecyldimethylphosphine oxide

被引:54
作者
Fainerman, VB
Miller, R
Kovalchuk, VI
机构
[1] Max Planck Inst Kolloid & Grenzflachenforsch, D-14424 Potsdam, Germany
[2] Donetsk Med Univ, Med Physicochem Ctr, UA-83003 Donetsk, Ukraine
[3] Inst Biocolloid Chem, UA-03680 Kiev, Ukraine
关键词
D O I
10.1021/jp021876q
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A model for the surface pressure isotherm and high frequency limit of dilational elasticity of a surfactant adsorption layers is proposed which assumes a two-dimensional compressibility of adsorbed molecules. While this compressibility has almost no significant effect on the isotherm, the elasticity is enormously affected. Experimental data for dodecyldimethylphosphine oxide (C12DMPO) show very good agreement with the model when a compressibility coefficient epsilon of about 0.007 m/mN is introduced.
引用
收藏
页码:6119 / 6121
页数:3
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