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Synthesis and Surface Active Properties of Novel Nonionic Aryl Oleic Diethanolamide Surfactants
Authors:Zhigang Xu   Dongliang Liu  Weihong Qiao  Zongshi Li  Lubo Cheng
Affiliation: a State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, China
Abstract:A series of novel aryl oleic diethanolamide (AOD) surfactants with different hydrophobic groups were synthesized. An aromatic ring introduced to a long alkyl chain had a significant effect on reducing water surface tension. The critical micelle concentration (CMC) and the surface tension (γcmc) at the CMC were investigated. The CMC was 4.56 × 10-8 mol/L to 5.83 × 10-6 mol/L for AOD1:1 (molar ratio of aryl oleic acid: diethanolamide = 1:1) and corresponding γcmc was 36.4 mN/m to 39.3 mN/m. The CMC of AOD1:2 (molar ratio of aryl oleic acid: diethanolamide = 1:2) were in 1.21 × 10-7-9.98 × 10-6 mol/L and γcmc were in 31.6-34.4 mN/m.
Keywords:aryl oleic diethanolamide  aryl alkanolamide  surface tension  critical micelle concentration
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