NDLI: Thermodynamic modeling of CTAB aggregation in water-ethanol mixed solvents

Content Provider	Springer Nature Link
Author	Li, W. Han, Y. C. Zhang, J. L. Wang, L. X. Song, J.
Copyright Year	2006
Abstract	Accurate estimation of the CMC and aggregation numbers of individual surfactants is necessary to predict aggregation properties of surfactant mixtures, as well as to produce materials with controlled structures in the template synthesis. Thermodynamic equations are established to predict the aggregation behavior of cetyltrimethylammonium bromide (CTAB) in water-ethanol mixed solvent based on Nagarajan’s thermodynamic models. The calculated CMC and the aggregate size distribution are consistent with the experimental data and indicate that ethanol increases the CMC value and broadens the aggregate size distribution of CTAB. The calculated free energy reveals that ethanol greatly affects the transfer free energy of surfactant tails, the aggregate core-solvent interface free energy, and the ionic component of the free energy of head group interaction. The small angle XRD analysis of the pore structure of template-synthesized silica demonstrates that the suggested model can provide reasonable estimation of the CMC and the aggregation number of CTAB in water-ethanol mixed solvent, as well as indicates that the ethanol content in a solvent is one of the important factors affecting the periodic mesostructure of silica.
Starting Page	304
Ending Page	310
Page Count	7
File Format	PDF
ISSN	1061933X
Journal	Colloid Journal
Volume Number	68
Issue Number	3
e-ISSN	16083067
Language	English
Publisher	Nauka/Interperiodica
Publisher Date	2006-01-01
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Polymer Sciences Surfaces and Interfaces, Thin Films
Content Type	Text
Resource Type	Article
Subject	Colloid and Surface Chemistry Physical and Theoretical Chemistry Surfaces and Interfaces

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