A new and consistent model for dynamic adsorption of CTAB at air/water interface
A new and simple equation, with only one parameter, was developed to model the equilibrium surface tension of the air/cetyltrimethylammonium bromide (CTAB) solution interface. The new equilibrium model provides a single best-fitted prediction, instead of several solutions obtained by the conventiona...
| Main Authors: | , , |
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| Format: | Journal Article |
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Elsevier BV
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/30336 |
| _version_ | 1848753060083400704 |
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| author | Phan, Chi Le, Thu Yusa, S. |
| author_facet | Phan, Chi Le, Thu Yusa, S. |
| author_sort | Phan, Chi |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | A new and simple equation, with only one parameter, was developed to model the equilibrium surface tension of the air/cetyltrimethylammonium bromide (CTAB) solution interface. The new equilibrium model provides a single best-fitted prediction, instead of several solutions obtained by the conventional Szyszkowski equation. Subsequently, the equation was used to develop a new dynamic model, which does not require a Gibbs adsorption isotherm. The diffusion coefficient of CATB was also independently measured by 1H NMR and used as an input for the new dynamic model. The new model was applied to dynamic surface tension data at 2 different concentrations simultaneously to obtain best-fitted values for adsorption parameters. The modeling result was consistent with all experimental results. In contrast to previous studies in the literature, the new model predicts dynamic surface tension of CTAB successfully by a diffusion-controlled mechanism and a kinetics step was not required. The study provides a new and effective dynamic model for dynamic surface tension at the air/water interface. |
| first_indexed | 2025-11-14T08:18:30Z |
| format | Journal Article |
| id | curtin-20.500.11937-30336 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:18:30Z |
| publishDate | 2012 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-303362017-09-13T16:08:11Z A new and consistent model for dynamic adsorption of CTAB at air/water interface Phan, Chi Le, Thu Yusa, S. CTAB Adsorption kinetics Dynamic adsorption Air/water interface A new and simple equation, with only one parameter, was developed to model the equilibrium surface tension of the air/cetyltrimethylammonium bromide (CTAB) solution interface. The new equilibrium model provides a single best-fitted prediction, instead of several solutions obtained by the conventional Szyszkowski equation. Subsequently, the equation was used to develop a new dynamic model, which does not require a Gibbs adsorption isotherm. The diffusion coefficient of CATB was also independently measured by 1H NMR and used as an input for the new dynamic model. The new model was applied to dynamic surface tension data at 2 different concentrations simultaneously to obtain best-fitted values for adsorption parameters. The modeling result was consistent with all experimental results. In contrast to previous studies in the literature, the new model predicts dynamic surface tension of CTAB successfully by a diffusion-controlled mechanism and a kinetics step was not required. The study provides a new and effective dynamic model for dynamic surface tension at the air/water interface. 2012 Journal Article http://hdl.handle.net/20.500.11937/30336 10.1016/j.colsurfa.2012.04.044 Elsevier BV restricted |
| spellingShingle | CTAB Adsorption kinetics Dynamic adsorption Air/water interface Phan, Chi Le, Thu Yusa, S. A new and consistent model for dynamic adsorption of CTAB at air/water interface |
| title | A new and consistent model for dynamic adsorption of CTAB at air/water interface |
| title_full | A new and consistent model for dynamic adsorption of CTAB at air/water interface |
| title_fullStr | A new and consistent model for dynamic adsorption of CTAB at air/water interface |
| title_full_unstemmed | A new and consistent model for dynamic adsorption of CTAB at air/water interface |
| title_short | A new and consistent model for dynamic adsorption of CTAB at air/water interface |
| title_sort | new and consistent model for dynamic adsorption of ctab at air/water interface |
| topic | CTAB Adsorption kinetics Dynamic adsorption Air/water interface |
| url | http://hdl.handle.net/20.500.11937/30336 |