聚(丙烯酸-丙烯酰胺)高吸水树脂的制备及性能研究

摘要

The acrylic acid and acrylamide (PAA-AM) superabsorbent copolymer was synthesized by inverse-suspension polymerization with cyclohexane as dispersant, Span80 as suspension stabilizer, acrylic acid (AA) and acrylamide (AM) as comonomer, potassium persulfate as initiator, N, N'-methylene-bis-acrylamide as crosslinking agent. The influence of neutralization degree of AA, mass ratio of acrylic acid (AA) to acrylamide (AM), the amount of crosslinking agent and initiator, and reaction temperature on the absorption capability of water and salt solution were investigated. The results show that the water absorbency of the superabsorbent polymer prepared at the optimum condition in deionized water and in 0. 9%NaCl solution is about 1282 and 109g/g, respectively, and under the same conditions, the sample has more excellent water absorption and salt-resistance, which compares with the similar products of the SNF (French) production.%以环己烷为溶剂,Span80为悬浮稳定剂,丙烯酸(AA)和丙烯酰胺(AM)为共聚单体,过硫酸钾为引发剂,N,N’-亚甲基双丙烯酰胺(NMBA)为交联剂,采用反相悬浮聚合法制备了聚(丙烯酸-丙烯酰胺)(PAA-AM)高吸水树脂,研究了丙烯酸中和度、单体配比、交联剂和引发剂的用量、反应温度等因素对树脂吸液性能的影响.结果表明,最佳条件下制备的树脂吸去离子水和0.9％ NaCl水溶液的倍率分别为1282和109g/g.并且在同等条件下,该树脂样品与法国爱森(SNF)产同类产品相比具有较优异的吸水性能和耐盐性.