Journal
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
Volume 24, Issue 1, Pages 53-61Publisher
MARCEL DEKKER INC
DOI: 10.1081/DIS-120017943
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Micellization of polyoxyethylene tert-octylphenyl ether, Triton X-100 [TX-100], and sodium dodecyl sulfate [SDS] and their mixtures at varying mole fraction was investigated by surface tension measurements at 30degreesC. Changes in the critical micelle concentration (CMQ with the composition of the two surfactants so determined were analyzed by applying the Rubingh's regular solution theory to obtain interaction parameter, beta (=-3.81) showing synergism. Sodium dodecyl sulfate shows a remarkable interaction with polyethylene oxide [PEO, mol. wt. = 6000] and polyethylene oxide-polypropylene oxide-polyethylene oxide block copolymer [P65: EO19PO30EO19, total mol. wt. = 3400, % EO = 50], while no such interaction was observed for TX-100. Interaction weakens in mixed micelle and diminishes when the mole fraction of TX-100 in mixed system increases. Turbidimetric studies show that the presence of TX-100 in SDS improves calcium ion tolerance.
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