摘要：

以瓜尔胶(GG)、部分中和丙烯酸(NaA)、苯乙烯(St)和海泡石(ST)为原料, 过硫酸铵(APS)为引发剂, N,N′-亚甲基双丙烯酰胺(MBA)为交联剂, 在水溶液中通过接枝共聚反应合成了瓜尔胶-g-聚(丙烯酸钠-co-

Abstract:

Novel guar gum-g-poly(sodium acrylate-co-styrene)/sepiolite(GG-g-poly(NaA-co-St)/ST)superabsorbent composites were synthesized by grafted copolymerization in aqueous solution using ammonium persulfate（APS） as initiator and N,N′-methylenebisacrylamide (MBA)as crosslinker.The effect of St and ST contents in superabsorbent composites on swelling capacity and swelling rate was investigated and the results showed that the optimum St and ST contents were 24.3 mmol·L^-1 and 10%（mass）, respectively.The swelling behavior of the superabsorbent composites in solutions of different salts (NaCl, CaCl₂, AlCl₃)and pH values was also studied.The experiment results indicated that the polymeric network structure of GG-g-poly(NaA)could be improved by introducing a proper amount of St and ST, and then the swelling capacity and swelling rate of the superabsorbent composites increased by 46.1% and 62.7%, respectively.