Dynamic adsorption of a gemini surfactant at the air/water interface
The adsorption of a gemini surfactant, α,ω-bis(N-alkyl dimethylammonium) alkane dibromides, at the air/water interface was investigated by tensiometry. Equilibrium and dynamic surface tension were modelled by a new modelling framework, which is not based on Gibbs adsorption isotherm. The method cons...
| Main Authors: | , , |
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| Format: | Journal Article |
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Elsevier BV
2015
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| Online Access: | http://dx.org/10.1016/j.colsurfa.2015.06.012 http://hdl.handle.net/20.500.11937/35543 |
| _version_ | 1848754525334142976 |
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| author | Nguyen, Van Cuong Nguyen, T.V. Phan, Chi |
| author_facet | Nguyen, Van Cuong Nguyen, T.V. Phan, Chi |
| author_sort | Nguyen, Van Cuong |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The adsorption of a gemini surfactant, α,ω-bis(N-alkyl dimethylammonium) alkane dibromides, at the air/water interface was investigated by tensiometry. Equilibrium and dynamic surface tension were modelled by a new modelling framework, which is not based on Gibbs adsorption isotherm. The method consistently predicted the dynamic surface tension at five different concentrations and circumvented the uncertainties around the ionic state of the gemini surfactants. It was found that the gemini surfactant had much higher surface affinity, which arose from the double tails, than that of the normal cationic surfactants. The maximum surface excess was consistent with the proposed orientation of gemini surfactant at the air/water interface. The modelling framework provides an effective and consistent method to characterize the interfacial adsorption of gemini surfactants. |
| first_indexed | 2025-11-14T08:41:48Z |
| format | Journal Article |
| id | curtin-20.500.11937-35543 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:41:48Z |
| publishDate | 2015 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-355432017-01-30T13:50:19Z Dynamic adsorption of a gemini surfactant at the air/water interface Nguyen, Van Cuong Nguyen, T.V. Phan, Chi Surface tension Dynamic adsorption Gemini surfactant The adsorption of a gemini surfactant, α,ω-bis(N-alkyl dimethylammonium) alkane dibromides, at the air/water interface was investigated by tensiometry. Equilibrium and dynamic surface tension were modelled by a new modelling framework, which is not based on Gibbs adsorption isotherm. The method consistently predicted the dynamic surface tension at five different concentrations and circumvented the uncertainties around the ionic state of the gemini surfactants. It was found that the gemini surfactant had much higher surface affinity, which arose from the double tails, than that of the normal cationic surfactants. The maximum surface excess was consistent with the proposed orientation of gemini surfactant at the air/water interface. The modelling framework provides an effective and consistent method to characterize the interfacial adsorption of gemini surfactants. 2015 Journal Article http://hdl.handle.net/20.500.11937/35543 http://dx.org/10.1016/j.colsurfa.2015.06.012 Elsevier BV restricted |
| spellingShingle | Surface tension Dynamic adsorption Gemini surfactant Nguyen, Van Cuong Nguyen, T.V. Phan, Chi Dynamic adsorption of a gemini surfactant at the air/water interface |
| title | Dynamic adsorption of a gemini surfactant at the air/water interface |
| title_full | Dynamic adsorption of a gemini surfactant at the air/water interface |
| title_fullStr | Dynamic adsorption of a gemini surfactant at the air/water interface |
| title_full_unstemmed | Dynamic adsorption of a gemini surfactant at the air/water interface |
| title_short | Dynamic adsorption of a gemini surfactant at the air/water interface |
| title_sort | dynamic adsorption of a gemini surfactant at the air/water interface |
| topic | Surface tension Dynamic adsorption Gemini surfactant |
| url | http://dx.org/10.1016/j.colsurfa.2015.06.012 http://hdl.handle.net/20.500.11937/35543 |