Interfacial Properties of Oil-Water Interface in the Presence of Dodecyl (β-D-Glucopyranoside: Comparison of Interfacial and Emulsifying Properties of Dodecyl Glucopyranoside, Brij 35P and SDS
Niraula, Boris B., and Tham, K Chun, and Misni Misran, (2003) Interfacial Properties of Oil-Water Interface in the Presence of Dodecyl (β-D-Glucopyranoside: Comparison of Interfacial and Emulsifying Properties of Dodecyl Glucopyranoside, Brij 35P and SDS. Malaysian Journal of Science, 22 (2). pp. 145-152. ISSN 13943065
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University of Malaya, Faculty of Science, Dept. of Chemistry, Kuala Lumpur, Malaysia
IFT at o/w interface is evaluated using drop volume method. The apolar light oil phase consisted of paraffin oil-alcohol mixture of varying oil to alcohol mixing ratios, whereas the heavy phase consisted of deionized water. Surfactant tested were dodecyl-β-D-glucopyranoside, Brij 35p and SDS, all consisting of same number of carbon atoms at their hydrocarbon tail, but differ in head group and degree of polarity. The IFT of the oil-water interface reduced only slightly with the increase in alcohol volume fractions from 0.1 to 0.5 in the absence of surfactant. It saturated when the oil to alcohol mixing ratio became unity. On the contrary, in the presence of surfactant, the IFT of the oil-water interface reduced in a various degree, which depended largely on oil to alcohol mixing ratios, surfactant type and surfactant concentration. While dodecyl glucoside, as an emulsifying agent, was most effective in stabilizing these oil droplets in water media at oil to alcohol mixing ratios of 9/1 and 8/2 compared to oth r mixing ratios, Brij 35p and SDS were most effective in stabilizing these oil droplets at oil to alcohol mixing ratios of 5/5 and 6/4. As far as flow rate is concerned, irrespective of surfactant type, the oil-water interface showed flow rate independent IFT at all oil to alcohol mixing ratios at the given flow rates domain. Note that the degree of emulsification is indirectly identified by the degree of 1FT reduction.
|Keywords:||interfacial tension, mixing ratios, oil-water interface, paraffin oil-alcohol mixture, surfactant, dodecyl-β-D-glucopyranoside|
|Subjects:||Q Science, Computer Science|
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