新型抗温耐盐高分子絮凝材料的合成及性能

摘要

A novel temperature-resistant and salt-tolerant ampholytic hydrophobic modified polyacrylamide flocculant(AM/DAC/UANa copolymer) was synthesized through micellar polymerization from acrylamide(AM),acryloyloxyethyltrimethyl ammonium chloride(DAC) and sodium undecylenate(UANa). Its solution properties and flocculation performance were investigated. The AM/DAC/UANa copolymer exhibited higher viscosity retention ratio(56.8%) than those of conventional flocculating materials and owned excellent temperature-resistance and salt-tolerance. When bentonite(1.0%(w)) simulated waste-water with high ionic strength was treated with the AM/DAC/UANa copolymer at 80℃,the transmittance of the supernatant reached 97%. The AM/DAC/UANa copolymer was also employed to treat steam flooding waste-water with high salt content from Xinjiang oilfield at 80.0℃,and the results indicated that,when the copolymer dosage was 75.0 mg/L, flocculate could completely precipitate in 6.0 s and the light transmittance of the supernatant reached 99.0%.%以丙烯酰胺（AM）为非离子单体、丙烯酰氧乙基三甲基氯化铵（DAC）为阳离子单体、10-十一烯酸钠（UANa）为阴离子单体，通过胶束聚合的方式合成新型抗温耐盐疏水缔合两性离子型聚丙烯酰胺絮凝材料（AM/DAC/UANa共聚物），考察了AM/DAC/UANa共聚物的溶液性质和絮凝性能。实验结果表明，制备的AM/DAC/UANa共聚物具有优异的耐盐和耐温特性，在80℃下，试样黏度保留率达56.8%，远优于常规絮凝材料；AM/DAC/UANa共聚物在处理高温和高离子强度条件下1.0%（w）的膨润土模拟废水时，处理液的上清液光学透光率大于97%，在处理新疆油田蒸汽驱油返排液时，在80.0℃、絮凝剂用量为75.0 mg/L条件下，絮凝物在6.0 s内完全沉降，处理液的上清液光学透光率为99.0%。