Surface tension of aqueous amphiphiles
Surface tension measurements show that at low concentrations a surfactant bearing two ester groups in its chain assembles into small aggregates or else rearranges at the air/water interface to occupy less area per molecule. Only at higher surfactant concentrations do bona fide micelles form. The air...
| Publié dans: | Langmuir : the ACS journal of surfaces and colloids. - 1985. - 21(2005), 20 vom: 27. Sept., Seite 9010-2 |
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| Auteur principal: | |
| Autres auteurs: | , |
| Format: | Article |
| Langue: | English |
| Publié: |
2005
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| Accès à la collection: | Langmuir : the ACS journal of surfaces and colloids |
| Sujets: | Journal Article Research Support, N.I.H., Extramural Research Support, U.S. Gov't, P.H.S. Micelles Quaternary Ammonium Compounds Surface-Active Agents Water 059QF0KO0R dodecyltrimethylammonium GT3793XV5S plus... |
| Résumé: | Surface tension measurements show that at low concentrations a surfactant bearing two ester groups in its chain assembles into small aggregates or else rearranges at the air/water interface to occupy less area per molecule. Only at higher surfactant concentrations do bona fide micelles form. The air/water interface, it is argued, saturates abruptly and cooperatively (as does the aggregation into micelles at the higher concentrations) to give a "critical monolayer concentration". Yet saturation does not reduce the surface tension a great deal. The bulk of surface tension reduction is imparted by monomeric surfactant in the solution via a mechanism that is obscure but may be related in part to the mechanical perturbation of the saturated film during measurement |
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| Description: | Date Completed 17.04.2007 Date Revised 24.11.2016 published: Print Citation Status MEDLINE |
| ISSN: | 1520-5827 |