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Ultima descărcare din IBN: 2018-05-14 11:30 |
Căutarea după subiecte similare conform CZU |
541.18.04 (1) |
Chemistry. Crystallography. Mineralogy (2025) |
SM ISO690:2012 MCHEDLOV-PETROSSYAN, N.. Adsorption of Ionic Surfactants on Water/Air Interface: One More Transformation of the Gibbs Equation. In: Электронная обработка материалов, 2014, nr. 2(50), pp. 71-80. ISSN 0013-5739. |
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Электронная обработка материалов | ||||||
Numărul 2(50) / 2014 / ISSN 0013-5739 /ISSNe 2345-1718 | ||||||
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CZU: 541.18.04 | ||||||
Pag. 71-80 | ||||||
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The adsorption of ionic surfactants on the water/air or water/hydro carbon interface is considered. One form of the well-known Gibbs equation takes into acc ount the surface excess of the amphiphilic ion in the compact layer, or monolayer, 2 m (2D adsorption), and the differential of the electrical potential of this layer. This expression is modified using some simplifying assumptions. The dependence of the surface tension, , on the activity of the amphiphilic ion, a 2 , degree of gegen-ions binding in the compact layer, , and 2 m is transformed into the following relationship: 2 σ ln d R Td a = 2 22 1 222 ln 1 2 2(1 β ) ln [1 ( / )] m mm mm t db da RT . Here 2 m denotes the 2 m value at complete filling of the adlayer, t = –1, 0, or 1 for the two-phase model of partition, for immobile or mobile monolayer respectively, b is the cohesion constant; both the long-tailed ion and the gegen-ion are singlecharged. The usefulness of the proposed equation is discussed. |
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Cuvinte-cheie water/air interface, adsorption of ionic surfactant, adsorption in the monomolecular layer, degree of gegen-ions binding, surface tension |
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