氟碳型两性聚丙烯酰胺驱油剂的制备与性能

 以全氟辛基乙基丙烯酸酯(FM)为疏水单体，与丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、甲基丙烯酰氧乙基三甲基氯化铵（DMC）通过自由基胶束共聚法制得氟碳型两性聚丙烯酰胺 (FPAM)驱油剂。考察了影响共聚反应的各种因素和变化规律，确定了合理的聚合工艺条件。FPAM水溶液中存在强烈的分子间缔合作用；在共聚反应温度50℃、共聚反应时间8h、疏水单体FM质量分数为0. 3%、AMPS质量分数为15%、DMC质量分数为8%、引发剂K2S2O8质量分数(占单体质量)为0.3%、乳化剂与疏水单体摩尔比(n(OP-10)/ n(FM))为10的条件下，合成的氟碳型两性聚丙烯酰胺(FPAM)驱油剂的抗盐、抗剪切、耐高温和驱油性能均良好。

PREPARATION AND PROPERTIES OF FLUOROCARBON-TYPE AMPHOTERIC POLYACRYLAMIDE FLOODING AGENT

Fluorocarbon-modified polyacrylamide (FPAM) was prepared by free micellar copolymerization of acrylamide (AM), 2-acrylamide-2-methyl propane sulfonic (AMPS), methacryloyloxyethyl trimethyl ammonium chloride (DMC) and 2-(perfluorooctyl) ethyl acrylate (FM), initiated by redox initiation. The copolymerization factors affecting the intrinsic viscosity and apparent viscosity of FPAM aqueous solution were discussed, and the optimum conditions for FPAM copolymerization were determined. The results showed that there were strongly intermolecular hydrophobically associating interactions in FPAM copolymer aqueous solution. The salt resistance, shear resistance, temperature resistance and sweeping efficiency of FPAM copolymer were better when the copolymerization temperature was 50℃, the copolymerization time was 8 h, the mass fractions of FM, AMPS, DMC, initiator K2S2O8 in copolymerization system were 0.3%, 15%，8%, 0.3%, respectively, and the molar ratio of emulsifier to hydrophobic monomer (n(OP-10)/ n(FM)) was 10.