Influence in the Surface Activity for Some Cationic Thiol Surfactants Using Their Nanostructures

• Published in: Journal of dispersion science and technology 2011-09, Vol.32 (9), p.1325-1331
• Main Authors: Azzam, E. M. S., Kandile, N. G., Badawi, A. M., Sami, R. M.
• Format: Article
• Language: English
• Subjects: Cationic; Cationic thiol surfactants; Chemistry; Colloidal state and disperse state; Emulsions. Microemulsions. Foams; Exact sciences and technology; General and physical chemistry; Micelles. Thin films; Nanocomposites; Nanomaterials; Nanoparticles; nanopowders; Nanostructure; Nanotechnology; Physical and chemical studies. Granulometry. Electrokinetic phenomena; self-assembling; Silver; silver nanoparticles; surface activity; Surface chemistry; Surface physical chemistry; Surfactants; Transmission electron microscopy
• ISSN: 0193-2691; 1532-2351
• DOI: 10.1080/01932691.2010.505825

A series of some cationic thiol surfactants based on 2-mercapto pyridine were synthesized. These surfactants have decyl, dodecyl and cetyl hydrophobic moiety, respectively. The nanopowder forms of the synthesized surfactants were prepared using the ball mill technique and studied using transmission electron microscope (TEM). In addition, the nanostructure of these surfactants with the prepared colloidal silver nanoparticles (AgNPs) was investigated using ultraviolet (UV) spectrophotometer and TEM techniques. The surface activity of the synthesized surfactants and their nanostructures as nanopowder forms and with silver nanoparticles was investigated using surface tension, interfacial tension, and emulsion stability techniques. The surface and thermodynamic parameters such as critical micelle concentration (CMC), effectiveness (Π cmc ), minimum area (A min ), and free energies (ΔG mic , ΔG ads ) were determined. The results show the influence in the surface activity of the nanostructures for the synthesized surfactants more than that of the individual surfactants.