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http://dx.doi.org/10.12925/jkocs.2010.27.3.5

Synthesis and Properties of Gemini Type's Diethylene Glycol Dicarboxylates  

Choi, Eun-Ji (Department of Industrial Engineering Chemistry Chungbuk National University)
Jeon, Young-Soo (College of Pharmacy. Chungbuk Nat'l, Univ.)
Lee, Jae-Duk (Department of Industrial Engineering Chemistry Chungbuk National University)
Jeong, Noh-Hee (Department of Industrial Engineering Chemistry Chungbuk National University)
Publication Information
Journal of the Korean Applied Science and Technology / v.27, no.3, 2010 , pp. 257-265 More about this Journal
Abstract
This study concerned about "Gemini type co-surfactant" which has very interesting properties with new components. They were synthesized by reaction of diethylene glycol monoethyl ether and dicarboxylic acid. The structure could be comfirmed with FT-IR and $^1H$-NMR. Surface active properties such as surface tension, evaluated cmc, cloud point, emulsing power were measured respectively at given conditions. Their surface tensions in the aqueous solution were decreased to 33~35 dyne/cm, which was lower than 39 dyne/cm of SDS, and their cmc values evaluated by surface tension method were $5.0{\times}10^{-1}\sim7.5{\times}10^{-1}$ mol/L. And the emulsifying power was excellent in jojoba oil. All of the synthesized Gemini surfactants possessed good water solubility and their cloud point were $48\sim58^{\circ}C$. As results, Gemini surfactants which were synthesized are expected to be applied as O/W emulsifiers.
Keywords
Gemini; co-surfactant; dicarboxylate; surface tension; cloud point; emulsion;
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