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采用N,N’-亚甲基双丙烯酰胺作交联剂,过硫酸铵作引发剂,通过水溶液聚合法制得了聚(丙烯酸-co-丙烯酰胺)/高岭土复合高吸水性树脂。研究了高岭土的添加量、丙烯酰胺用量、中和度、引发剂用量以及交联剂用量等对吸水率的影响。得到的最佳反应条件为:中和度为70%,丙烯酰胺、高岭土、引发剂和交联剂量分别为丙烯酸单体质量24%、18%、0.96%和0.09%。制得的高吸水性树脂在室温下30min每克吸蒸馏水和自来水分别约为其自身质量的890倍和290g倍。
Poly (acrylic acid-co-acrylamide) / kaolin composite superabsorbent resin was prepared by aqueous solution polymerization using N, N’-methylenebisacrylamide as a crosslinking agent and ammonium persulfate as initiator. The effects of adding amount of kaolin, amount of acrylamide, degree of neutralization, amount of initiator and amount of crosslinking agent on water absorption were studied. The optimal reaction conditions were: the degree of neutralization was 70%, the mass of acrylamide, kaolin, initiator and crosslinking monomer were 24%, 18%, 0.96% and 0.09%, respectively. The superabsorbent resin obtained at room temperature 30min per gram of distilled water and tap water were about their own quality of 890 times and 290g times.