摘要：

以壳聚糖（CS）为原料，先用苯甲醛对壳聚糖中的C₂—NH₂进行保护，再用环氧氯丙烷对壳聚糖中的C₆—OH进行环氧化反应并与乙二胺交联，最后在酸性条件下脱去保护基苯甲醛，制备了多胺基壳聚糖（MCS）。实验结果表明，在298 K下，MCS对活性艳蓝X-BR（RBB）平衡吸附量为1 290.12 mg/g，是CS的6.28倍，吸附行为符合Langmuir等温吸附，吸附动力学符合准二级动力学模型，升高温度有利于吸附的进行。

关键词: 壳聚糖, 吸附, 活性艳蓝, 乙二胺

Abstract:

A new route for preparing C₆ quaternary ammonium chitosan derivatives(MCS)is explored. The C₂—NH₂ of the chitosan(CS)are initially protected by benzaldehyde. They are then synthesized by the introduction of ethylenediamine into C₆—OH on CS via epichlorohydrin. The final product is obtained after removal of the benzaldehyde with dilute hydrochloride solution. The results show that the equilibrium adsorption capacity(Q_e)of RBB onto MCS is 1 290.12 mg/g at 298 K,which is 6.28 times of the Q_e of CS. The equilibrium data are fitted well with Langmuir isotherms. The kinetic data follow a pseudo-second-order model and the adsorption process is endothermic reaction.

Key words: chitosan, adsorption, brilliant blue, ethylenediamine

中图分类号: 

• TQ424.3