耐盐型AA/AMPS/PVA吸水树脂研究

针对高盐地层条件下的油井出水问题,以丙烯酸(AA),2-丙烯酰胺-2-甲基丙磺酸(AMPS)为聚合单体,聚乙烯醇(PVA)为互穿剂,采用网络互穿技术合成耐盐型AA/AMPS/PVA吸水树脂。以吸水率为评价指标考察合成条件对树脂性能的影响。最佳工艺条件:w(单体)=25%,丙烯酸中和度85%,w(交联剂)=0.175%,w(引发剂)=0.15%,树脂在80℃时,2×104 mg/L NaCl溶液中膨胀倍率为21.77g/g,在5×104mg/L CaCl2溶液中膨胀倍率为12.46g/g。研究表明,树脂平衡溶胀时间为120min,树脂形成了适度有效的交联网状结构,在过硫酸钾溶液中能够完全降解。

STUDY ON SALT-RESISTANT AA/AMPS/PVA POLYMER HYDROGEL

The AA/AMPS/PVA polymer hydrogel was synthesized by interpenetrating PVA into the polymer through solution polymerization.The reaction parameters were investigated using water absorbency as the target.The optimal reaction conditions were found as follows: monomer concentration 25%,AA neutralization 85%,concentration of crosslinker 0.175%,concentration of initiator 0.15%.At 80 ℃,the water absorbency of the hydrogel was 21.77g/g in 2×104 mg/L NaCl salt solution and 12.46 g/g in 5×104 mg/L CaCl2 salt solution.The time of the gel need to reach equilibrium swelling was 120 min.SEM micrographs show that the gel formed an effective network.The degradation of the gel can proceed to completeness in KPS solution.