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Phase Equilibria of a Mixed Alkali Soap/ Carboxylic Acid/Water System


Suhaimi, Hamdan and Kassim, Anuar and Che Rose, Laili (1993) Phase Equilibria of a Mixed Alkali Soap/ Carboxylic Acid/Water System. Pertanika Journal of Science & Technology, 1 (1). pp. 1-10. ISSN 0128-7680


A preliminary investigation was carried out on the phase equilibria in the three component systems, water/sodium caprylate/octanoic acid, water/sodium caprylate and sodium dodecyl sulphate (l:1) / octanoic acid at 30°C. The phases were separated by repeated centrifugation. The birefringence was observed under cross-polarisers and their consistency, texture and optical pattern were examined under the polarizing microscope. On the basis of the results obtained, a phase diagram was drawn that includes two phases of isotropic solution and two mesophases. Results also showed a decreased amount of octanoic acid utilized in obtaining the lamellar liquid crystal phase. The critical micelle concentration was also reduced for the mixed surfactant system

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Additional Metadata

Item Type: Article
Divisions: Faculty of Environmental Studies
Publisher: Universiti Putra Malaysia Press
Keywords: Mixed surfactant system
Depositing User: Nur Izzati Mohd Zaki
Date Deposited: 24 Nov 2009 00:45
Last Modified: 27 May 2013 07:05
URI: http://psasir.upm.edu.my/id/eprint/3088
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