The Excess Thermodynamic Quantities of Adsorption of a Binary Nonionic Surfactant Mixture
| Autor: | Makoto Aratono, Hidemi Iyota, Norihiro Ikeda, Akio Ohta, Hisanobu Minamizawa, Takanori Takiue |
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| Rok vydání: | 1999 |
| Předmět: |
Activity coefficient
Molality Fundamental thermodynamic relation Chemistry Enthalpy Thermodynamics Mole fraction Surfaces Coatings and Films Electronic Optical and Magnetic Materials Gibbs free energy Condensed Matter::Soft Condensed Matter Biomaterials Surface tension Condensed Matter::Materials Science symbols.namesake Colloid and Surface Chemistry Adsorption symbols Organic chemistry Physics::Chemical Physics |
| Zdroj: | Journal of Colloid and Interface Science. 217:128-136 |
| ISSN: | 0021-9797 |
| DOI: | 10.1006/jcis.1999.6363 |
| Popis: | The thermodynamic relations were developed for examining the miscibility of surfactants in the adsorbed film from the viewpoints of the thermodynamic quantities of adsorption such as Gibbs free energy, entropy, volume, enthalpy, and energy. The deviation from the additivity relation, the straight line connecting the thermodynamic quantities of the respective pure surfactants as a function of the composition of the adsorbed film, was proved to yield the corresponding excess quantities of adsorption. The criterion of the ideal mixing was offered and summarized with respect to the composition of adsorbed film, the mean area occupied by surfactants, and the thermodynamic quantities of adsorption. The resulting equations were applied to the simple nonionic surfactants mixture of decyl methyl sulfoxide (DeMS) and octyl methyl sulfoxide (OMS). The surface tension of the aqueous solution was measured as a function of not only the total molality and mole fraction of surfactants but also temperature under atmospheric pressure. Copyright 1999 Academic Press. |
| Databáze: | OpenAIRE |
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