Synthesis of novel N,N-di-n-alkylaldonamides and properties of their surface chemically pure adsorption layers at the air/water interface
| Autor: | Dorota Piłakowska-Pietras, Klaus Lunkenheimer, Andrzej Piasecki |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Alkylation
Surface Properties Stereochemistry Gluconates Micelle Biomaterials Surface tension Lactones Structure-Activity Relationship Surface-Active Agents Homologous series chemistry.chemical_compound symbols.namesake Colloid and Surface Chemistry Adsorption Gibbs isotherm Pulmonary surfactant Solubility Alkyl chemistry.chemical_classification Chemistry Air Water Surfaces Coatings and Films Electronic Optical and Magnetic Materials symbols Physical chemistry |
| Zdroj: | Journal of Colloid and Interface Science. 271:192-200 |
| ISSN: | 0021-9797 |
| Popis: | A homologous series of new surface-active N,N-di-n-alkyl-substituted amides derived from delta-D-gluconolactone and alpha-D-glucoheptonic-gamma-lactone were synthesized. The adsorption isotherms of their surface-chemically pure solutions were measured and evaluated to obtain the adsorption parameters of standard free energy of adsorption (DeltaG(0)(ad)), surface excess (Gamma( infinity )), cross-sectional area of the adsorbed surfactant molecule (A(min)), and surface interaction parameter (H(s)). The surfactants possess comparatively low solubilities and do not form micelles at room temperature. This behavior is opposite to that of the other types of sugar surfactants showing excellent solubility and a strong tendency to association/micellization. The derivatives of gluconamide reveal surface activity slightly higher than that of the derivatives of glucoheptonamide, especially for long alkyl chains (n(C)4). An increase in A(min) of about 6 A(2)/molecule for the gluconic series is observed. |
| Databáze: | OpenAIRE |
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