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研究了二异氰酸酯与壳聚糖的交联反应，其产物与壳聚糖相比，酸溶解度由８２．０４％降到５８．０８％。ＤＳＣ曲线表明，交联产物的热稳定性明显提高，对低价重金属离子（Ｈｇ２＋，Ｃｄ２＋，Ｃｕ２＋）有选择性吸附，并在吸附量上有所提高。
The crosslinking reaction of diisocyanate with chitosan was studied. The solubility of the product was reduced from 82.04% to 58.08% compared with that of chitosan. DSC curves show that the thermal stability of the cross-linked product was significantly improved, and the selective adsorption of low-valent heavy metal ions (Hg2 +, Cd2 +, Cu2 +) was achieved and the adsorption capacity increased.