氮杂冠醚接枝壳聚糖的合成及其对金属离子的吸附性能  

SYNTHESIS OF AZACROWN ETHER GRAGTED CHITOSAN AND ITS ADSORPTION PROPERTIES FOR METAL IONS

作　　者：杨智宽[1] 汪玉庭[1] 袁扬[1] 唐玉蓉[2] 

机构地区：[1]武汉大学环境科学系 [2]武汉大学分析测试中心,武汉430072

出　　处：《离子交换与吸附》1999年第6期518-523,共6页Ion Exchange and Adsorption

基　　金：国家自然科学基金!29577281

摘　　要：本文利用壳聚糖C2位上活泼的氨基先与苯甲醛反应制备成保护氨基的Schiff碱壳聚糖，再将含环氧基的氮杂冠醚接枝到壳聚精的C6位上，制得含Schiff碱的氮杂冠醚壳聚糖，随后使其在一定条件下脱去苯甲醛，合成了一种含氮杂冠醚功能基的新型壳聚糖衍生物．研究了其对重金属离子Pb2+，Cu2+，Cr3+,Cd2+的静态吸附性能．结果表明，该吸附剂对重金属离子具有较强的吸附能力，在Pb2+、Cu2+、Cd2+的混合离子体系中，能选择吸附Cu2+．A new type chitosan crown ether derivative (CTAE) was synthesized using aazacrown ether as grafting agent The C2 amino groups in chitosan was protected from reactionbetween benzaldehyde and chitosan to form N-benzylidene chitosan. After the reaction withepoxypropane group azacrown ether to give the Schiff base benzaldehyde chitosan-crown ether(CTBA), the Schiff base in CTBA was cleaved in dilute ethanol hydrochloride solution to giveazacrown ether grafted chitosan (CTAE). The adsorption properties of the azarown etherchitosan were determined for Pb2+, Cu2+, Cd2+ and Cr3+. The experimental results showed that thegrafted chitsan crown ether has high selectivity for adsorption of Cu2+ in the coexistence of Pb2+,Cu2+ and Cd2+.

关 键 词：壳聚糖 氮杂冠醚 吸附剂 合成 接枝 

分 类 号：O647.33[理学—物理化学] O636.1[理学—化学]