Entropy of adsorption of mixed surfactants from solutions onto the air/water interface
Journal of the Chemical Society, Faraday Transactions
By: L.-W. Chen, J.-H. Chen, and N.-F. Zhou
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Abstract
The partial molar entropy change for mixed surfactant molecules adsorbed from solution at the air/water interface has been investigated by surface thermodynamics based upon the experimental surface tension isotherms at various temperatures. Results for different surfactant mixtures of sodium dodecyl sulfate and sodium tetradecyl sulfate, decylpyridinium chloride and sodium alkylsulfonates have shown that the partial molar entropy changes for adsorption of the mixed surfactants were generally negative and decreased with increasing adsorption to a minimum near the maximum adsorption and then increased abruptly. The entropy decrease can be explained by the adsorption-orientation of surfactant molecules in the adsorbed monolayer and the abrupt entropy increase at the maximum adsorption is possible due to the strong repulsion between the adsorbed molecules.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Entropy of adsorption of mixed surfactants from solutions onto the air/water interface |
| Series title | Journal of the Chemical Society, Faraday Transactions |
| DOI | 10.1039/FT9959103873 |
| Volume | 91 |
| Issue | 21 |
| Year Published | 1995 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Journal of the Chemical Society, Faraday Transactions |
| First page | 3873 |
| Last page | 3878 |
| Google Analytic Metrics | Metrics page |