Microscopic study of AOT and CTAB anionic-rich catanionic phase

Chun, Yuan Tan and Kok, Siong Khoo and Shahidan Radiman, and Irman Abdul Rahman, and Nur Farhana bt Amari, (2014) Microscopic study of AOT and CTAB anionic-rich catanionic phase. Sains Malaysiana, 43 (4). pp. 623-628. ISSN 0126-6039


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Catanionic system using anionic sodium bis-(2ethylhexyl)sulfosuccinate (AOT) and cationic cetyltrimethylammonium bromide (CTAB) is studied. The system is prepared by addition of CTAB solution to a prepared AOT solution until slight anionic-rich catanionic phase is produced. Catanionic system consists of the mixture of different types of surfactants and counterion due to electrostatic interaction between the oppositely charged surfactant. Both of these products affect the in surface activity of the surfactant. Hydrodynamic diameters decrease and clearer solution were seen with the increase of CTAB concentration in solution mixture. As a result, mixed surfactant with larger hydrophobic region and the presence of counterion will induce smaller vesicle to form in catanionic system.

Item Type:Article
Keywords:Alkyl chain number; anionic-rich phase; catanionic system; electrostatic interaction; surfactant number
Journal:Sains Malaysiana
ID Code:7058
Deposited By: ms aida -
Deposited On:07 Apr 2014 11:26
Last Modified:14 Dec 2016 06:42

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