Summary
N-Octyloxycarbonylmethyl pyridinium bromide (C 8), N-dodecyloxycarbonylmethyl pyridinium bromide (C 12) and N-cetyloxycarbonylmethyl pyridinium bromide (C 16) were prepared. Several studies were carried out with their aqueous solutions. Surface tensions, electrical conductivities, and biodegradabilities were evaluated. The antibacterial and antifungal activities of the cationic surfactants were studied. Surface properties, particularly critical micelle concentration (CMC), effectiveness (Π CMC ), efficiency (P c20), maximum surface excess (Γmax), and minimum surface area (A min) were investigated at different concentrations at 20, 35, and 50°C respectively. Free energies, enthalpies, entropies of micellization, and adsorption of the surfactants in the aqueous solution were studied.
Zusammenfassung
Verschiedene Untersuchungen an wäßrigen Lösungen von N-Octyloxycarbonylmethyl-pyridiniumbromid (C 8), N-Dodecyloxycarbonylmethyl-pyridiniumbromid (C 12) und N-Cetyloxycarbonylmethyl-pyridiniumbromid (C 16) wurden durchgeführt. Oberflächenspannungen, elektrische Leitfähigkeiten und biologische Abbaubarkeit wurden bestimmt. Die bakterizide und fungizide Aktivität der kationischen Tenside wurde untersucht. Oberflächenparameter, insbesondere kritische Micellenkonzentration (CMC), Effektivität (ΠCMC), EffizienzP c20), maximaler Oberflächenüberschuß (Γmax) und minimale Oberfläche (A min) wurden bei verschiedenen Konzentrationen und bei Temperaturen von 20, 35 und 50°C untersucht. Die freien Energien, Enthalpien, Entropien und die Asorption der Tenside in wäßriger Lösung wurden bestimmt.
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Gad, E.A.M., El-Sukkary, M.M.A. & Azzam, E.M.S. Surface and thermodynamic studies of N-((octyl, dodecyl, and cetyl) oxycarbonylmethyl) pyridinium bromide. Monatsh Chem 128, 1237–1246 (1997). https://doi.org/10.1007/BF00807255
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DOI: https://doi.org/10.1007/BF00807255