文献类型：期刊文献

英文题名：Synthesis of Triblock Copolymers via RAFT Polymerization and Their Application as Surfactants for Crude Oil-in-Water Emulsion

作者：Huang, Jing[1];Xu, Jun[1];Chen, Kaimin[2];Wang, Tongshuai[1];Cui, Chao[1];Wei, Xiaoming[3];Zhang, Rui[1];Li, Li[1];Guo, Xuhong[1]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Shanghai Univ Engn Sci, Coll Chem & Chem Engn, Shanghai 201620, Peoples R China;[3]Petrochina Liaohe Oilfield Co, Panjin 124010, Peoples R China

年份：2015

卷号：54

期号：5

起止页码：1564

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20150800547954);WOS:【SCI-EXPANDED(收录号:WOS:000349580300020)】；

基金：Financial support by the National Natural Science Foundation of China (51003028, 21004021, and 51273063), 111 Project Grant (B08021), and the Fundamental Research Funds for the Central Universities are gratefully acknowledged. The authors also thank Petrochina Shengli Oilfield Company for affording oil samples and technological supports.

语种：英文

外文关键词：Polyethylene glycols - Emulsions - Free radical polymerization - Nuclear magnetic resonance spectroscopy - Crude oil - Emulsification - Surface active agents - Living polymerization - Gel permeation chromatography

摘要：As surfactants for crude oil emulsions, poly[N,N-(dimethylamino) ethyl methacrylate-b-poly(ethylene glycol) methyl ether methacrylate-b-lauryl methacrylate] (PDMA-b-PPMA-b-PLMA) triblock copolymers were synthesized via reversible additionfragmentation chain transfer (RAFT) polymerization and characterized by gel permeation chromatography and proton nuclear magnetic resonance spectroscopy. The copolymers exhibited high interfacial activity which could be tuned by simply adjusting the solution pH, and remarkably reduced the dodecane/water interfacial tension from 52.8 to 2.1 mN/m, producing stable dodecane-in-water emulsions even at a low concentration of 0.5 mg center dot mL1. Utilization of these copolymers in Shengli crude oil further confirmed their emulsification capacity. The apparent viscosity of crude oil reduced from 34?000 to 350 mPa center dot s after emulsification at 20 degrees C, and the formed emulsions exhibited long-term stability for above 3 months. Due to the balanced hydrophilicity and hydrophobicity, PDMA(22)-PPMA(27)-PLMA(36) proved to be the most efficient surfactant, which generated stable O/W emulsion with the smallest dosage.