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- W862151094 abstract "The cmc's of sodium dodecyl sulfate (SDS)/Triton X-100 surfactant mixtures were determined by surface tension measurement at various surfactant compositions. The cmc values were lower than those predicted from ideal mixture. The regular solution theory was applied to calculate the interaction parameter, micellar composition, and the activity coefficients of surfactants in the mixed micelle. The interaction parameter () was - 2.1. The nonideality arised largely from decreased activity of SDS in the mixed micelle. The mean aggregation numbers () and micropolarity of hydrocarbon region of the mixed micelles were determined by luminescence probe techniques. The total aggregation number () in mixed micelles showed little dependency on the composition of the micelle. The apparent dielectric constant of the hydrocarbon region of the micelle vs micellar composition plot showed positive deviation from linearity. Emission and emission quenching of excited tris(2,2'-bipyridine)ruthenium(Ⅱ) cation, , by methylviologen () were also investigated in the mixed micellar solutions. The quenching rate was lowest when the mole fraction of SDS in the surfactant mixtures () is about 0.25 and highest at = 0.85. This was explained in terms of combined effects of binding of the cations with the micelle and mobility of the bound cations on the surface of the micelles." @default.
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- W862151094 date "1989-01-01" @default.
- W862151094 modified "2023-09-26" @default.
- W862151094 title "Properties of Sodium Dodecyl Sulfate / Triton X-100 Mixed Micelle" @default.
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