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http://dx.doi.org/10.14478/ace.2011.22.4.376

Synthesis and Characterization of Interfacial Properties of Glycerol Surfactant  

Lim, JongChoo (Department of Chemical and Biochemical Engineering, Dongguk University-Seoul)
Lee, Seul (Department of Chemical and Biochemical Engineering, Dongguk University-Seoul)
Kim, ByeongJo (AK ChemTech Central Research Lab.)
Lee, JongGi (AK ChemTech Central Research Lab.)
Choi, KyuYong (AK ChemTech Central Research Lab.)
Publication Information
Applied Chemistry for Engineering / v.22, no.4, 2011 , pp. 376-383 More about this Journal
Abstract
The CMCs of LA and LA3 nonionic surfactants obtained from the reaction between glycidol and lauryl alcohol were found to be $0.97{\times}10^{-3}mol/L$ and $1.02{\times}10^{-3}mol/L$ respectively and the surface tensions for 1 wt% surfactant were 26.99 and 27.48 mN/m respectively. Dynamic surface tension measurements using a maximum bubble pressure tensiometer showed that the adsorption rate of surfactant molecules at the interface between the air and the surfactant solution was found to be relatively fast in both surfactant systems, presumably due to the high mobility of surfactant molecules. The contact angles of LA and LA3 nonionic surfactants were 27.8 and $20.9^{\circ}$ respectively and the dynamic interfacial tension measurement by a spinning drop tensiometer showed that interfacial tensions at equilibrium condition in both systems were almost the same. Also both surfactant systems reached equilibrium in 2~3 min. Both surfactant solutions showed high stability when evaluated by conductometric method and the LA nonionic surfactant system provided the higher foam stability than the LA3 nonionic surfactant system. The phase behavior experiments showed a lower phase or oil in water (O/W) microemulsion in equilibrium with an excess oil phase at all temperatures studied. No three-phase region was observed including a middle-phase microemulsion or a lamellar liquid crystalline phase.
Keywords
glycerol nonionic surfactant; critical micelle concentration; dynamic surface tension; dynamic interfacial tension;
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