Abstract
The conductances of cetylpyridinium chloride (CPyCl)–tetradecyltrimethylammonium bromide (TTAB) mixtures over the entire mole fraction range of CPyCl (xCPyCl) have been measured in water, ethylene glycol–water (EG–W) and diethylene glycol–water (DEG–W) mixtures consisting of 20, 40 and 60 wt.% EG and DEG in their respective binary mixtures at 30 °C. From the conductivity data, the mixed critical micellar concentration (cmc), degree of counter-ion dissociation (χ), standard Gibbs energy of transfer of the surfactant hydrocarbon chain from medium to the micelle (ΔGHP°), and Gibbs energy of transfer of surface contributions (ΔGs°) for mixed micelles were computed. The non-ideality in the mixed micelle formation was evaluated by using the regular solution theory extended by Rubingh. It was observed that the non-ideality decreases with increase in the amount of EG or DEG. This was attributed to the solvation of the surfactant hydrophobic tail by EG or DEG molecules owing to EG or DEG–hydrocarbon interactions.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Chemical Society, Faraday Transactions
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
