Title: Synthesis and Surface Active Properties of a Novel Linear Dodecyl Diphenyl Ether Sulfonate Gemini Surfactant
Abstract: Abstract The linear dodecyl diphenyl ether sulfonate gemini surfactant (C 12 ‐DLADS) has been synthesized by a new route from lauric acid according to a five‐step reaction sequence consisting of acidification, Friedel–Crafts acylation, Clemmensen reduction, sulfonation and a neutralization reaction. The surfactant and intermediates were characterized by 1 H‐NMR, HPLC/MS and elemental analysis. The properties have been studied by surface tension ( γ CMC ) and conductivity measurements. The thermodynamic parameters of micellization were calculated. The test results show that C 12 ‐DLADS has lower critical micelle concentration (CMC) and better capability for lowering the γ CMC . The γ CMC and CMC are 36.04 mN/m and 6.03 × 10 −4 mol/L respectively at 45 °C. Moreover, with the increase in temperature, the conductivity of C 12 ‐DLADS increased, while the counterion binding K 0 decreased. The thermodynamic data show that the micellization process for the surfactant C 12 ‐DLADS is entropy driven.
Publication Year: 2012
Publication Date: 2012-04-07
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 6
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