THE ADSORPTION OF TRITON X-100 AT THE AIR-AQUEOUS SOLUTION INTERFACE

被引：48
|
作者：
JANCZUK, B [1 ]
BRUQUE, JM [1 ]
GONZALEZMARTIN, ML [1 ]
DORADOCALASANZ, C [1 ]
机构：
[1] UNIV EXTREMADURA,DEPT FIS,E-06071 BADAJOZ,SPAIN
来源：
LANGMUIR | 1995年 / 11卷 / 11期
关键词：
D O I：
10.1021/la00011a055
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Measurements of the surface tension of aqueous solutions of Triton X-100 (TX-100) were made at different temperatures. Isotherms and thermodynamic adsorption parameters were determined from the surface tensions. Also, the-equation of state for the monolayer film of TX-100 at the water-air interface was analyzed. A linear dependence was found between log Gamma and log C in the region of low concentration of TX-100 in solution, and three different methods used to calculate the free energy of adsorption gave slightly different results. In the region of low concentration the Pi(A - A(0)) values were equal to 1kT. At high concentration there were attractive Lifshitz-van der Waals forces between the apolar parts of the TX-100 molecules and repulsive acid-base forces between the heads of the TX-100 molecules in the adsorbed monolayer film.
引用
收藏
页码：4515 / 4518
页数：4
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