Dishwashing performance of mixed palm stearin sulfonated methyl esters and polyoxyethylene sorbitan esters |
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Authors: | Wen Huei Lim Salmiah Ahmad |
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Affiliation: | (1) Advanced Oleochemical Technology Centre, Lot 9 & 11, Japan P/14, Seksyen 10, 43650 Bandar Baru Bangi, Selangor Darul Ehsan, Malaysia |
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Abstract: | The detergency profiles of sodium salt α-sulfonated methyl esters derived from palm stearin (α-SMEPS) and polyoxyethylene
(20) sorbitan monoesters (POESE) in mixed micelle systems were evaluated as a function of the weight ratios of α-SMEPS/POESE
polyoxyethylene (20) sorbitan monolaurate (12), polyoxyethylene (20) sorbitan monostearate (18∶0), and polyoxyethylene (20)
sorbitan monooleate (18∶1)] at different water hardness values (5.12, 51.2, and 512.0 ppm CaCO3) and temperatures (20, 30, 45, and 65°C), respectively. All the mixtures of α-SMEPS/POESE (12, 18∶0, and 18∶1) systems exhibited
a synergistic effect at 65°C in the absence of hardness. This was evaluated by measuring the percentage of soil removed. The
systems showed an increase in detergency with both the temperature and water hardness. Maximal detergency was observed with
5.12 ppm CaCO3 in the mixed surfactant solution. |
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Keywords: | α -SMEPS detergency POESE temperature water hardness |
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