[article]
| Titre : |
Micellization of alkyl trimethyl ammonium bromides in aqueous solutions – Part 1 : critical micelle concentration (CMC) and ionization degree |
| Type de document : |
texte imprimé |
| Auteurs : |
Jarmila Oremusovà , Auteur |
| Année de publication : |
2012 |
| Article en page(s) : |
p. 231-240 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Surfactants
|
| Tags : |
'Ammonium quaternaire' Surfactants 'Bromure alkyltriméthyle ammonium (C6-C18) 'Degré ionisation' liaison ions' 'Effet température' |
| Index. décimale : |
668.1 Agents tensioactifs : savons, détergents |
| Résumé : |
Conductivities of alkyl trimethyl ammonium bromides (alkyl = hexyl-, octyl-, decyl-, dodecyl-, tetradecyl-, hexadecyl-, and octadecyl-) in aqueous solutions were measured as a function of molarity of surfactants, length of chain and temperature. Critical micelle concentrations (CMC) were estimated from the dependence of the specific conductivity on molarity of the surfactants. It was determined that the temperature dependence of CMC is U-shaped with a minimum shifting toward higher temperatures with decreasing chain length of the alkyl group. Quantities characterizing behaviors of surfactants below and above CMC were calculated and compared from conductivity measurements. Measured and calculated values of studied compounds were also compared with results of many other authors. The paper has the form of a minireview. It is a comparison of the presented experimental data of alkyltrimethylammonium bromides (C6– C18) with earlier works reported. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Methods
- RESULTS AND DISCUSSION : Conductivity below CMC - Determination of critical micelle concentration - Effect of temperature on the CMC |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=14903 |
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 3 (04-05/2012) . - p. 231-240
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Micellization of alkyl trimethyl ammonium bromides in aqueous solutions – Part 1 : critical micelle concentration (CMC) and ionization degree in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 3 (04-05/2012)
