Correlation of the critical micelle concentration for aqueous solutions of nonionic surfactants
Resource
Fluid Phase Equilibria 232(2005), 37–43
Journal
Fluid Phase Equilibria
Pages
-
Date Issued
2005
Date
2005
Author(s)
Cheng, Jaw-Shin
DOI
246246/2006111501233108
Abstract
The critical micelle concentrations (cmc, mole fraction) for nonionic CiEj surfactants in aqueous solution were calculated in this study using
a modified excess Gibbs energy model (m-Aranovich and Donohue (AD) model). This local-composition lattice model was derived in our
previous study for correlating the limiting activity coefficients. The only adjustable parameter required in the m-AD model is the interchange
energy. In surfactant system calculations, this parameter is found as a strong function of the physical properties of surfactants. A generalized
correlation for the interchange energy is proposed in this investigation. Satisfactory cmc calculation results (mole fraction) are obtained for
37 systems. The m-AD model has less number of generalized parameters in comparison to the theoretically based method, and shows better
accuracy than that from other activity coefficient models. Predictions of the cmc values (mole fraction) for mixed nonionic surfactants systems
are also applicable using this m-AD model.
a modified excess Gibbs energy model (m-Aranovich and Donohue (AD) model). This local-composition lattice model was derived in our
previous study for correlating the limiting activity coefficients. The only adjustable parameter required in the m-AD model is the interchange
energy. In surfactant system calculations, this parameter is found as a strong function of the physical properties of surfactants. A generalized
correlation for the interchange energy is proposed in this investigation. Satisfactory cmc calculation results (mole fraction) are obtained for
37 systems. The m-AD model has less number of generalized parameters in comparison to the theoretically based method, and shows better
accuracy than that from other activity coefficient models. Predictions of the cmc values (mole fraction) for mixed nonionic surfactants systems
are also applicable using this m-AD model.
Subjects
Nonionic surfactant systems
Critical micelle concentration
Excess Gibbs energy model
Publisher
Taipei:National Taiwan University Dept Chem Engn
Type
journal article
File(s)![Thumbnail Image]()
Loading...
Name
3186.pdf
Size
23.19 KB
Format
Adobe PDF
Checksum
(MD5):da30922e4b3a7c4b0495e719169c41c8