Area per surfactant molecule values of gemini surfactants at the liquid–hydrophobic solid interface
| Autor: | Ferdinand Devínsky, Ivan Lacko, Martin Pisárčik, Milton J. Rosen, Mária Polakovičová |
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| Rok vydání: | 2005 |
| Předmět: |
Models
Molecular Surface Properties Chemistry Air Cationic polymerization Analytical chemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials Surface tension Surface-Active Agents Colloid and Surface Chemistry Pulmonary surfactant Cations Solvents Organic chemistry Molecule Hydrophobic and Hydrophilic Interactions |
| Zdroj: | Journal of Colloid and Interface Science. 289:560-565 |
| ISSN: | 0021-9797 |
| DOI: | 10.1016/j.jcis.2005.03.092 |
| Popis: | Areas per surfactant molecule at the liquid/hydrophobic solid ( A LS ) and the liquid/air ( A LA ) interface as a function of the spacer length are reported for cationic gemini surfactants having (CH 2 ) n spacer s . A LA increases with increasing spacer length up to 6–8 CH 2 groups in the spacer and then levels off. A LS values indicate a more closely packed arrangement of the surfactant molecules than that at the liquid/air interface. Comparison of A LA and A LS values indicates that the surfactant molecules at the liquid/hydrophobic solid interface are almost three times as closely packed as those at the liquid/air interface. A comparison of the experimental values of the area per surfactant molecule at both interfaces was made with those calculated from dimensions of the surfactant molecule in vacuo. |
| Databáze: | OpenAIRE |
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