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Phase behavioural study of palm-based lauryl alcohol ethoxylates


Lim, Hong Ngee and Kassim, Anuar and Huang, Nay Ming and Abdullah, Dzulkefly Kuang and Abdullah, Abdul Halim and Yarmo, Mohd Ambar and Yeong, Shoot Kian (2008) Phase behavioural study of palm-based lauryl alcohol ethoxylates. Pertanika Journal of Science & Technology, 16 (2). pp. 141-156. ISSN 0128-7680; ESSN: 2231-8526

Abstract / Synopsis

Palm-based lauryl alcohol ethoxylates were synthesized with different chain lengths of ethylene oxide using an ethoxylation reactor. The effect of changing the ethylene oxide chain length was investigated by reacting 3, 6 and 100 moles of ethylene oxide with palm- based lauryl alcohol. The samples were labeled as C12E3, C12E6 and C12E100. The 6 moles of ethylene oxide was approximately the same length as the palm-based lauryl alcohol. The chromatograms of C12Ex showed less retention peaks than the standard, Brij 40 (Tetraethylene glycol dodecyl ether - C12E4). Fourier Transformed Infrared Spectroscopy (FTIR) displayed a strong C-O stretch at 1120 cm-1 which was attributed to C-O single-bond stretching of the ether group. The ternary phase diagrams for a series of olive or olein oil/water/C12Ex systems were investigated at 25°C. The important features of the ternary phase systems are the emulsion and the concentrated emulsion phases. Optical microscopy revealed the difference in morphology between emulsion and concentrated emulsion. The particle size of the emulsions and the concentrated emulsions were in the range of 2.635 µm to 9.175 µm and 0.694 µm to 4.764 µm, respectively. The rheological flow curves measurement of the concentrated emulsion showed crossover of the ascendant and descendant curves which indicated structural build up of the sample instead of destruction.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
Publisher: Universiti Putra Malaysia Press
Keywords: Palm-based lauryl alcohol ethoxylates; Ethoxylation reactor; Ternary phase diagram; Emulsion; Concentrated emulsion
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 30 Jul 2015 16:42
Last Modified: 16 Mar 2016 10:46
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