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采用水溶液聚合法,以丙烯酸、丙烯酰胺和马来酸酐为单体,过硫酸钠为引发剂,聚乙二醇双丙烯酸酯600(PEGDA600)为交联剂,合成了高吸水树脂。考察了单体配比、引发剂用量、交联剂用量和聚合温度对吸水树脂吸盐水性能的影响。结果表明,当丙烯酸/丙烯酰胺/马来酸酐质量比为10/2.5/1.8,PEGDA600用量为3种单体总质量的4%,引发剂用量为3种单体总质量的0.2%,丙烯酸中和度为75%,聚合温度为65℃时,吸水倍率具有最大值,对0.9%NaCl盐水的最大吸水倍率为128g/g。
Aqueous superabsorbent was synthesized by aqueous solution polymerization using acrylic acid, acrylamide and maleic anhydride as monomer, sodium persulfate as initiator and polyethylene glycol diacrylate 600 (PEGDA600) as crosslinking agent. The effects of monomer ratio, initiator amount, crosslinking agent dosage and polymerization temperature on the salt water absorption of water-absorbent resin were investigated. The results showed that when the mass ratio of acrylic acid / acrylamide / maleic anhydride was 10 / 2.5 / 1.8, the amount of PEGDA600 was 4% of the total mass of the three monomers, the initiator was 0.2% of the total mass of the three monomers, With the degree of 75% and the polymerization temperature of 65 ° C, the water absorption ratio has the maximum value, and the maximum water absorption ratio to 0.9% NaCl brine is 128 g / g.