Effect of temperature on critical micelle concentration and thermodynamic potentials of micellization of anionic ammonium dodecyl sulfate and cationic octadecyl trimethyl ammonium chloride
- Authors
- Kang, KH; Kim, HU; Lim, KH
- Issue Date
- Sep-2001
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- critical micelle concentration; minimum critical micelle concentration; power-law exponent; temperature dependence of critical micelle concentration; thermodynamic potentials of micellization
- Citation
- COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, v.189, no.1-3, pp 113 - 121
- Pages
- 9
- Journal Title
- COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
- Volume
- 189
- Number
- 1-3
- Start Page
- 113
- End Page
- 121
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/47240
- DOI
- 10.1016/S0927-7757(01)00577-5
- ISSN
- 0927-7757
- Abstract
- The critical micelle concentrations (CMCs) of anionic ammonium dodecyl sulfate (ADS) and cationic octadecyltrimethylammonium chloride (OTAC) were determined at various temperatures using a du Nouy ring tensiometer. The CMC decreased to a certain minimum and then increased with the temperature, displaying a U-shaped behavior. This behavior was analyzed using a power-law equation on the basis of reduced variables. The exponents of the power-law equation were found to be 1.05 for ADS and 1.12 for OTAC. These values were different from previous literature values of 1.74 for ionics, 3.54 for commercial ionics, and 5.80 for commercial amphoterics. Also, the U-shaped behavior is explained in terms of hydrophobic forces, as described by the thermodynamic potentials and parameters in the pseudo-phase separation model. (C) 2001 Elsevier Science B.V. All rights reserved.
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- Appears in
Collections - College of Engineering > School of Chemical Engineering and Material Science > 1. Journal Articles
- College of Natural Sciences > Department of Chemistry > 1. Journal Articles
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