The Rule of Interfacial Equilibrium |
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Authors: | A. E. Feinerman Yu. S. Lipatov |
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Affiliation: | a Institute of Macromolecular Chemistry, National Academy of Sciences, Kiev, Ukraine |
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Abstract: | The detailed analysis of the well-known relation γ12 = γ1 -γ2 has been done (γ12, γ1 and γ2 are interfacial and surface tensions of phases 1 and 2). The analysis of equilibrium of a liquid drop at the interface with another liquid allowed us to prove that this relation should be modified by including in it the value γ2* which is considered as the result of all interactions at the interface and is accepted depending on γ1. The value γ2* represents the surface tension of a phase in the ternary point solid-liquid-gas, i.e. in the zone of interfacial nonuniformity. The modified form of the relation, called the rule of interfacial equilibrium, allows us to show that thermodynamic work of adhesion is equal to the cohesion energy of the interphase formed by phase 2. |
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Keywords: | Interfacial tension interfacial equilibrium surface tension drop equilibrium thermodynamic work of adhesion cohesion energy interphase |
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