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A Star‐Shaped Anionic Surfactant: Synthesis, Alkalinity Resistance, Interfacial Tension and Emulsification Properties at the Crude Oil–Water Interface
Author(s) -
Zhang Rui,
Cai Youfeng,
Wang Jixing,
Zhao Zijing,
Mao Xu,
Peng Zhigang
Publication year - 2017
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1007/s11743-017-1988-y
Subject(s) - pulmonary surfactant , chemistry , surface tension , triethanolamine , critical micelle concentration , emulsion , aqueous solution , chemical engineering , alkalinity , sulfonate , titration , micelle , chromatography , organic chemistry , sodium , analytical chemistry (journal) , biochemistry , physics , quantum mechanics , engineering
In this research, a star‐shaped surfactant was synthesized through the chlorination reaction, alkylation reaction and sulfonation reaction of triethanolamine, which is composed of three hydrophobic chains and three sulfonate hydrophilic groups. The critical micelle concentration (CMC) of the surfactant was measured by the surface tension method, and the results showed that it had high surface activity with CMC of 5.53 × 10 −5 mol/L. The surfactant was superior in surface active properties to the reference surfactants SDBS and DADS‐C 12 . The interfacial tension (IFT) of the studied crude oil–water system (surfactant concentration 0.1 g/L, NaOH concentration 0.5 g/L, and experimental temperature 50 °C) dropped to 1.1 × 10 −4 mN/m, which can fulfil the requirement of surfactants for oil displacement. An aqueous solution of the surfactant and crude oil was emulsified by shaking, which formed a highly stable oil‐in‐water (O/W) emulsion with particle size of 5–20 μm. The oil displacement effect was almost 12%.