Abstract
The influence of halide ions of (sodium salt) electrolytes on the mixed micellization of a cationic gemini (dimeric) surfactant, hexanediyl-1,6-bis(dimethylcetylammonium) bromide (16-6-16) and a cationic conventional (monomeric) surfactant, cetyltrimethylammonium bromide (CTAB) have been investigated. The critical micelle concentration (CMC) of the mixed (16-6-16+CTAB) surfactants was measured by the surface tension measurements. The surface properties: viz., the surfactant concentration required to reduce the surface tension by 20 mN/m (C20), the surface pressure at the CMC (ΠCMC), the maximum surface excess concentration at the air/water interface (Γmax), the minimum area per surfactant molecule at the air/water interface (Amin), etc. of the mixed micellar surfactant systems were evaluated. In the absence and presence of electrolytes, the thermodynamic parameters of the mixed micellar surfactant systems were also evaluated.
| Original language | English |
|---|---|
| Pages (from-to) | 185-190 |
| Number of pages | 6 |
| Journal | Russian Journal of Physical Chemistry A |
| Volume | 92 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1 Jan 2018 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2018, Pleiades Publishing, Ltd.
Keywords
- critical micelle concentration
- gemini surfactant
- halide ions
- mixed micelles
- thermodynamics
ASJC Scopus subject areas
- Physical and Theoretical Chemistry