Abstract
Enthalpies of solution of sodium octanoate in water, 1-propanol and aqueous mixtures of 1-propanol, 1-butanol, 1-pentanol and 1-hexanol, and of the alcohols in aqueous solutions of sodium octanoate at various concentrations were determined calorimetrically at 35 °C. Most ΔH(soln) values are exothermic and strongly dependent on the solute concentration. The main energetic factor governing the process of dissolution of the surfactant is associated with changes in the water structure caused by the presence of alcohol. That governing the process of the alcohol dissolution in surfactant solutions is due to the effect alcohols have on the CMC of the octanoate. There is no indication of the alcohol being either solubilized in the interior of the aqueous micelle, or becoming part of the micellar film. The solubility at 35 °C of sodium octanoate in water, 1-propanol and their mixtures has also been determined.
| Original language | English |
|---|---|
| Pages (from-to) | 67-74 |
| Number of pages | 8 |
| Journal | Colloid and Polymer Science |
| Volume | 263 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 1985 |
Keywords
- Alcohols
- enthalpy of solution
- sodium octanoate
- solubility of