Effects of isomeric alcohols on the phase behavior and solubilization of the microemulsion systems formed by anionic surfactants |
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Authors: | Zai-Mei Zhang Jin-Ling Chai Yan Li Xiao-Nan Xue Jian-Jun Lu |
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Institution: | (1) Department of Chemistry, Shandong Normal University, Jinan, 250014, People’s Republic of China; |
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Abstract: | The middle-phase ɛ-β fishlike phase diagrams of the pseudoquaternary microemulsion systems sodium dodecyl sulfate (sodium
dodecyl sulfonate, sodium dodecyl benzene sulfonate)/1-butanol (2-butanol, t-butanol)/n-octane/brine (5% NaCl) were plotted. The effect of three isomeric alcohols (1-butanol, 2-butanol, and t-butanol) on the phase behavior and solubilization was investigated. From the ɛ-β fishlike phase diagram, the composition
of the interfacial layer, the solubilities of alcohols and the solubilization ability (the solubility parameter SP*, and the
middle-phase volume fraction ϕ) of the microemulsion systems were calculated and discussed. The alcohol content in the interfacial
layer and the solubilities of alcohols are in the order: 1-butanol < 2-butanol < t-butanol, but the solubilization ability is in the inverse order. |
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