화학공학소재연구정보센터
Journal of Industrial and Engineering Chemistry, Vol.6, No.1, 47-52, January, 2000
Synthesis and Surface Active Properties of Sodium α-Sulfonated Fatty Ethoxide
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Gemini type surfactants with α-sulfonated alkanoic ehtylene glycol diester(RmEOn-disF)were prepared by transeterification of methy1 seters of α-sulfonated fatty acid with di- or triethylene glycols, followed by neutralization with NaOH. Crude products were purified by reversed-phase column chromatography on an octadecyl-modified silica gel, and obtained as monoester (RmEOn-monoSF) and diester (RmEOn-monoSF). Characteristic solution behavior of these RmEOn-monoSF and RmEOn-diSF was examined and compared with the similar types of double long chain surfactants bearing two other ionic head groups. All monoesters prepared in this work had Krafft points 0℃ and also possessed good calcium stability. Critical micelle concentration of the monoesters increased monotonously, according to an increase in the number of EO units. These results suggest that the EO residue of the monoesters shows hydrophilicity. On the other hands, the diesters showed high water solubility, low foam ability, and critical micelle concentrations that were ten fold lowered to those of the monoester.
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