Synthesis and Surface Active Properties of Novel Nonionic Aryl Oleic Diethanolamide Surfactants

• Published in: Petroleum science and technology Vol. 24; no. 11; pp. 1363 - 1370
• Main Authors: Xu, Zhigang, Liu, Dongliang, Qiao, Weihong, Li, Zongshi, Cheng, Lubo
• Format: Journal Article
• Language: English
• Published: Colchester Taylor & Francis Group 01.11.2006; Taylor & Francis
• Subjects: Applied sciences; Argon oxygen decarburizing; Aromatic compounds; aryl alkanolamide; aryl oleic diethanolamide; critical micelle concentration; Crude oil; Crude oil, natural gas and petroleum products; Diethanolamide; Energy; Exact sciences and technology; Fuels; Oleic acid; Petroleum products, gas and fuels. Motor fuels, lubricants and asphalts; Processing of crude oil and oils from shales and tar sands. Processes. Equipment. Refinery and treatment units; Surface chemistry; Surface tension; Surfactants; Alkyl; Oleic acid; critical micelle concentration; aryl oleic diethanolamide; Micelle; Surface properties; Surface tension; Surfactant; aryl alkanolamide
• ISSN: 1091-6466; 1532-2459
• DOI: 10.1080/10916460500292717

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 (γ cmc ) 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 γ cmc 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 γ cmc were in 31.6-34.4 mN/m.