四元共聚吸附树脂的制备及吸附性能研究

Preparation and property of quaternary copolymer adsorption resin

以N,N′-亚甲基双丙烯酰胺(NMBA)作为交联剂,采用静置热聚合法制备了AMPS/AM/AA/CTS四元共聚吸附树脂。通过单因素法和正交试验法,得到了合成最佳吸附阳离子染料结晶紫的吸附树脂的工艺条件,并运用FT-IR和TG-DTG对树脂的分子结构和热稳定性进行了分析。实验结果表明:该树脂的最佳吸附量的工艺条件是:n(AMPS)∶n(AM)∶n(AA)∶W(CTS)=3∶1∶5∶3%,pH=4.69,w(NMBA)=0.094%,固含量为36.2%;最佳吸水倍率的工艺条件是:n(AMPS)∶n(AM)∶n(AA)∶W(CTS)=3∶0.7∶3.5∶2%,pH=5.61,w(NMBA)=0.119%,固含量为36.59%。所得树脂最大吸附量为83.8mg/g,在此条件下其最大吸水倍率为1035g/g,并且该树脂具有较好的热稳定性。

Using N,N′-methylene-bis-acrylmide as crosslinker,2-acrylamido-2-methylpropanesulfonic acid（AMPS）,acrylamide（AM）,acrylic acid（AA）and chitosan（CTS）as monomers,a adsorption resin was prepared by static thermal polymerization.The optimal adsorption conditions of cationic dye crystal violet were obtained by orthogonal and single factor methods.The molecular structure and thermal stability of resin was studied by FT-IR and TG-DTG.The results showed that the optimized adsorption on crystal violet was：n（AMPS）∶n（AM）∶n（AA）∶W（CTS）=3∶1∶5∶3%,pH=4.69,w（NMBA）=0.094%,solid content=36.2%.The optimized adsorption on water was：n（AMPS）∶n（AM）∶n（AA）∶W（CTS）=3∶0.7∶3.5∶2%,pH=5.61,w（NMBA）=0.119%,solid content=36.59%.The maximum adsorption capacity on crystal violet and water was 83.8mg/g and 1035g/g,respectively.The copolymer had great thermal stability.