Surface mixed films of cationic surfactants at aqueous solution/air interface

✍ Scribed by Maria Paluch; Beata Korchowiec

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 500 KB
• Volume: 82
• Category: Article
• ISSN: 0927-7757
• DOI: 10.1016/0927-7757(93)02624-n

✦ Synopsis

The results are presented of experimental studies of the adsorption of surfactants at the solution/air interface from an aqueous binary cationic surfactant mixture: n-dodecyltrimethylammonium bromide-n-dodecylpyridinium chloride (DT MAB-DPC).

The surface properties of the above-mentioned mixture were studied by surface tension and surface potential measurements.

These measurements were carried out as a function of the concentration of DTMAB aqueous solution at a constant concentration of DPC. Using the results obtained, the mixed adsorbed film composition, Gouy's potential of the monolayer, the effective dipole moment of the adsorbed molecule, and the interaction between the adsorbed molecules and the CMC of the solutions were determined.

To this purpose, Gibbs adsorption equation, the Gouy and Helmholtz formulae and the Rosen method were applied.