Surface and thermodynamic studies of N-((octyl, dodecyl, and cetyl) oxycarbonylmethyl) pyridinium bromide
作者:E. A. M. Gad、M. M. A. El-Sukkary、E. M. S. Azzam
DOI:10.1007/bf00807255
日期:1997.12
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 (IICMC), efficiency (P-c20), maximum surface excess (Gamma(max)), and minimum surface area (A(min)) were investigated at different concentrations at 20, 35, and 50 degrees C respectively. Free energies, enthalpies, entropies of micellization, and adsorption of the surfactants in the aqueous solution were studied.