甲基丙烯酸甲醇与氰乙基化交联淀粉的接枝共聚反应及其改性接枝物对金属离子吸附性能的研究

THE GRAFT COPOLYMERIZATION OF METHYL METHACRYLATE ONTO CYANOETHYLATED CROSSLINKED STARCH AND THE ADSORBABILITIES OF MODIFIEDGRAFTS FOR METAL IONS

以ＡＰＳ－ＴＵ和ＡＰＳ－Ｕ为引发体系，研究了氰乙基化交联淀粉与甲基丙烯酸甲酯（ＭＭＡ）的接枝共聚反应规律；ＩＲ，ＳＥＭ表征了产物的结构；当［ＡＰＳ］＝［ＴＵ］＝［Ｕ］＝３×１０－２Ｍ，［ＭＭＡ］＝６×１０－１Ｍ，Ｓ：Ｌ＝４：１００，６０℃，反应６小时时，Ｇ％、Ｅ％值最高．用ＮＨ２ＮＨ２改性后，含－ＣＯＯＮＨＮＨ２功能基的接枝共聚淀粉对Ｃｕ、Ｃｄ、Ｃｒ、Ｐｈ等重金属离子有较好的吸附性能．

The graft copolymerization of methyl methacrylate (MMA) onto cyanoethylated crosslinked starch was carried out using APS-TU and APS-U as initiation system. The reaction products were characterizated by IR and SEM. The maximum G% and E%and M, of grafted side - chain were obtained at [APS]= [TU], [APS]= [U], [APS]= 3×10-2M, [MMA] = 6 ×10m-1M,and a solid liquid ratio of 4: 100 at 60℃ for 6h. The grafted copolymers were modified with hydrazine. The modified grafts containing COONHNH2 groLlp have better adsorbabilities for Cu2+,Cd2+,Cr6+,Pb2+ and others.