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Demulsification of oil‐in‐water emulsions using hyperbranched poly(amido amine) demulsifiers with 4,4‐diaminodiphenyl methane as initial cores
Author(s) -
Kuang Jiazhe,
Jiang Xia,
Mi Yuanzhu,
Ye Fan,
Zhang Zejun,
Huang Zhiming,
Yuan Huaikui,
Luo Yue,
Xie Fangqin
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.48846
Subject(s) - demulsifier , surface tension , materials science , chemical engineering , aqueous solution , amine gas treating , polymer chemistry , ethylenediamine , emulsion , chemistry , organic chemistry , physics , quantum mechanics , engineering
Hyperbranched poly(amido amine) demulsifier (PDDM) was synthesized by a modified “one‐pot” method with 4,4‐diaminodiphenyl methane as the central core and ethylenediamine as the interior branches. The structure of the demulsifier was confirmed by proton nuclear magnetic resonance and Fourier transform infrared. The effects of the temperature and PDDM concentration on the demulsification performance were investigated, and PDDM performance was compared to that of the hyperbranched demulsifier with 1,3‐propanediamine as the central core. When the emulsions were treated with the demulsifier concentration of 50 mg L −1 at 60 °C for 120 min, the light transmittance and removed total organic content of the aqueous phase reached 87.4 and 99.72%, respectively. At the optimal demulsification temperature of 60 °C, the surface tension reduction and the critical micelle concentration were 27.38 mN m −1 and 1.30 × 10 −3 mol L −1 , respectively. The combination of surface tension and interfacial tension measurements and the analysis of micrographs and particles sizes provide evidence for the possible demulsification mechanism. The excellent demulsification performance of the hyperbranched demulsifier indicates that it has great potential for use in the demulsification of oil‐in‐water emulsions. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48846.