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利用壳聚糖Ｃ２位上活泼氨基与苯甲醛进行反应，制得了Ｓｃｈｉｆ碱苯甲醛壳聚糖（简称ＣＴＢ），再将合成的二苯并１６－冠－５氯代乙酸酯冠醚接枝到ＣＴＢ上，得到壳聚糖－苯甲醛－二苯并１６－冠－５乙酸酯冠醚（简称ＣＴＢＣ），使其在酸性条件下脱去苯甲醛，制得壳聚糖－二苯并１６－冠－５乙酸酯冠醚（简称ＣＴＣＥ）．经元素分析、红外光谱分析表征了其结构．并研究了ＣＴＢＣ和ＣＴＣＥ对Ｐｂ２＋、Ｃｕ２＋、Ｃｒ３＋、Ｎｉ２＋和Ｃｄ２＋的吸附性能，结果表明：ＣＴＢＣ比ＣＴＣＥ的吸附容量低，但前者比后者具有更好的选择性
Schiff base benzaldehyde chitosan (referred to as CTB) was prepared by the reaction of active amino group at the C2 position of chitosan and benzaldehyde, and then the synthesized dibenzo-16-crown-5 chloroacetate crown ether was grafted Onto CTB to obtain chitosan-benzaldehyde-dibenzo-16-crown-5 acetate crown ether (abbreviated as CTBC), which is taken off from the benzaldehyde under acidic conditions to obtain chitosan-dibenzo 16-crown-5 acetate crown ether (referred to as CTCE). Its structure was characterized by elemental analysis and infrared spectroscopy. The adsorption capacities of CTBC and CTCE on Pb2 +, Cu2 +, Cr3 +, Ni2 + and Cd2 + were studied. The results showed that the adsorption capacity of CTBC was lower than that of CTCE, but the former had better selectivity than the latter