Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 334, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.molliq.2021.116158
Keywords
Thermodynamic stabilization; Conformational entropy; Microcanonical microstates; Mixed micelles; Interaction coefficient
Funding
- Domus Hungarian Scholarship (Hungarian Academy of Sciences) [5697/30/2015/HTMT]
Ask authors/readers for more resources
The molar excess Gibbs energy of a binary mixed micelle can be represented by a first-order Margules function, with excess entropy primarily coming from conformational entropy. These mixed micelles consist of synergistic interactions between micellar building blocks of conformationally rigid and flexible surfactants.
Molar excess Gibbs energy of a binary mixed micelle with a conformationally flexible and rigid surfactant can be represented by first-order Margules function. Excess entropy comes from the conformational entropy rather than the configurational entropy. Such a binary mixed micelle with the synergistic interactions between micellar building blocks can be considered a pseudoternary mixed micelle from the conformationally rigid surfactant, twisted (globular) conformation of the conformationally flexible surfactant, and elongated conformation of the same surfactant. Excess entropy of such mixed micelles can be approximated with a microcanonical ensemble of the conformationally flexible surfactants. Particles of these surfactants are distributed between the average lower energy (elongated conformation) and the average higher energy (twisted conformation). A new structural parameter of mixed micelles was introduced - the parameter of disorder, which represents the molar fraction of the conformation with an average higher energy (twisted conformation) of the conformationally flexible surfactant in the mixed micellar pseudophase. Influence of the new structural parameter on the conformational rigid surfactant's excess chemical potential is discussed. (C) 2021 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available