A Multistate Adsorption Model for the Adsorption of C14EO4 and C14EO8 at the Solution/Air Interface

被引：8

作者：

Fainerman, Valentin B. ^{[1
]}

Kovalchuk, Volodymyr, I ^{[2
]}

Aksenenko, Eugene, V ^{[3
]}

Ravera, Francesca ^{[4
]}

Liggieri, Libero ^{[4
]}

Loglio, Giuseppe ^{[4
]}

Makievski, Alexander, V ^{[1
]}

Mishchuk, Natalia O. ^{[3
]}

Schneck, Emanuel ^{[5
]}

Miller, Reinhard ^{[5
]}

机构：

[1] SINTERFACE Technol, D-12489 Berlin, Germany

[2] Natl Acad Sci Ukraine, Inst Biocolloid Chem, UA-03680 Kiev, Ukraine

[3] Natl Acad Sci Ukraine, Inst Colloid Chem & Chem Water, UA-03680 Kiev, Ukraine

[4] CNR Inst Condensed Matter Chem & Technol Energy, Unit Genoa, I-16149 Genoa, Italy

[5] Tech Univ Darmstadt, Phys Dept, D-64289 Darmstadt, Germany

来源：

COLLOIDS AND INTERFACES | 2021年 / 5卷 / 03期

基金：

新加坡国家研究基金会;

关键词：

poly (oxyethylene) alkyl ether; dynamic surface tension; surface tension isotherm; dilational surface visco-elasticity; diffusion controlled adsorption; reorientation adsorption model; multistate adsorption model; bubble profile analysis tensiometry; DYNAMIC SURFACE-TENSION; POLY(ETHYLENE GLYCOL); NONIONIC SURFACTANTS; KINETICS; VISCOELASTICITY; REORIENTATION; ELASTICITY; PROTEINS; OXIDE); LAYERS;

D O I：

10.3390/colloids5030039

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：

The dynamic and equilibrium properties of adsorption layers of poly (oxyethylene) alkyl ether (CnEOm) can be well described by the reorientation model. In its classical version, it assumes two adsorption states; however, there are obviously surfactants that can adsorb in more than two possible conformations. The experimental data for C14EO4 and C14EO8 (dynamic and equilibrium surface tensions and surface dilational visco-elasticity as measured by bubble profile analysis tensiometry) are used to verify if a reorientation model with more than two possible adsorption states can better describe the complete set data of CnEOm adsorption layers at the water/air interface. The proposed refined theoretical model allows s different states of the adsorbing molecules at the interface. The comparison between the model and experiment demonstrates that, for C14EO4, the assumption of s = 5 adsorption states provides a much better agreement than for s = 2, while for C14EO8, a number of s = 10 adsorption states allows an optimum data description.

引用

页数：15

共 32 条

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