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以N,N′-亚甲基双丙烯酰胺为交联剂,过硫酸钾和亚硫酸氢钠为引发剂,在微波辐照下合成了凹凸棒复合丙烯酸高吸水性树脂。研究了凹凸棒用量、微波反应功率和反应时间等因素对高吸水树脂吸液性能的影响,并用IR谱对最佳产物的结构进行了表征。实验结果表明,最佳的反应条件为:丙烯酸和凹凸棒的质量比为10∶1,引发剂用量为单体质量的0.6%,交联剂N,N′-亚甲基双丙烯酰胺的用量为单体质量的0.04%,反应器功率为600 W,反应时间45 s,并且在该条件下高吸水树脂的吸水倍率为1 250,吸盐水倍率为210。
The attapulgite composite acrylic superabsorbent was synthesized under microwave irradiation with N, N’-methylenebisacrylamide as crosslinking agent, potassium persulfate and sodium bisulfite as initiator. The effects of such factors as the amount of attapulgite, microwave reaction power and reaction time on the liquid absorption properties of superabsorbent polymer were studied. The structure of the best product was characterized by IR spectrum. The experimental results show that the optimum reaction conditions are as follows: the mass ratio of acrylic acid to attapulgite is 10: 1, the initiator is 0.6% of the monomer, the amount of crosslinker N, N’-methylenebisacrylamide 0.04% of monomer mass, reactor power of 600 W, reaction time of 45 s, and under this condition superabsorbent water absorption ratio of 1 250, brine absorption ratio of 210.