CO2响应性高分子乳化剂的制备与性能评价

Preparation and Performance Evaluation of CO2 Responsive Polymer Emulsifier

张 俊 潘丽燕

ZHANG Jun PAN Liyan

为了提高乳化剂的稳定性，同时解决原油破乳的难题，以CO2响应性单体、亲水性聚醚结构，以及丙烯酰胺为骨架制备了一种高分子乳化剂，研究了该乳化剂的界面活性、乳化稳定性、对CO2的响应性等。结果表明，在常温和聚合物单体丙烯酰胺（AM）、聚醚甲基丙烯酸酯（PAM）、甲基丙烯酸二乙氨基乙酯（DEA）摩尔比为87.0∶11.8∶1.2的条件下制得的CO2响应性高分子乳化剂P-2的乳化性能最佳。600 mg/L P-2溶液与油相混合形成的O/W乳状液稳定性良好，具有较低的界面张力，乳状液粒径集中在700 nm左右。该乳化剂能对CO2重复多次响应，乳状液通入CO2后静置48 h的破乳率达87.3%。CO2响应性高分子乳化剂P-2既具有良好的乳化稳定性和CO2重复响应性能，又能实现快速高效破乳。图8表1参15

In order to improve the stability of oil-in-water emulsifier for crude oil and solve the problem of demulsification，a kind of polymer emulsifier was synthesized using CO2 responsive monomer，hydrophilic polyether structure and acrylamide（AM）as skeleton. The interfacial activity，emulsification stability and the response to CO2 of the emulsifier were studied. The results showed that polymer emulsifier P-2 had the best emulsification performance，which was synthesized under the condition of room temperature and 87.0∶11.8∶1.2 molar ratio of acrylamide（AM），polyether methacrylate（PAM）and 2-（diethylamino）ethylmethacrylate（DEA）. The O/W emulsion formed by the mixture of 600 mg/L P-2 solution and oil phase had good stability and low interfacial tension. The particle size of the emulsion concentrated at about 700 nm. The emulsifier could respond to CO2 repeatedly， and the demulsification rate of emulsion after injecting CO2 and leaving 48 hrs was up to 87.3% . The CO2 responsive polymer emulsifier P-2 not only had good emulsification stability and CO2 repetitive response performance，but also could achieve rapid and efficient demulsification.

10.19346/j.cnki.1000-4092.2019.04.018