【摘要】 海藻酸 -壳聚糖 -海藻酸 (ACA)离子取代凝胶作为一种新型的离子吸附剂具有许多独特的性能 ,本文通过引入羧甲基壳聚糖 (CMC)和低分子量壳聚糖 (O-Chs) ,对 ACA离子取代凝胶进行了改性 ,制备了 2种改性的离子取代凝胶 :ACA/羧甲基壳聚糖 (CMC) /戊二醛 (GA)和 ACA/ O-Chs/ GA.并制备了一种新型的生物微胶囊羧甲基壳聚糖 -壳聚糖 -羧甲基壳聚糖微胶囊 ,实验结果表明 ,这几种离子取代凝胶都具有很好的离子取代性能 ,能够有效吸附 Pb2 + .其中 ,ACA/ O-Chs/ GA具有较高的离心强度 ,离子取代前后变形不大 ,溶胀比小 ,是一种各方面性能相对较好的离子取代凝胶 .更多还原

【Abstract】 A novel type of biological microcapsule consisted of carboxymethyl chitosan, chitosan and carboxymethyl chitosan(CCC) was prepared as ion replacement gels. In addition, two modified ion replacement gels, alginate chitosan alginate/carboxymethyl chitosan/glutaraldehyde(ACA/CMC/GA) and alginate chitosan alginate/oligo chitosan/glutaraldehyde(ACA/O Chs/GA), were prepared. All of the ion replacement gels prepared exhibited good ion replacement properties and could be used for adsorption of Pb 2+ at higher rate. Among them the ACA/O Chs/GA appeared the best one.更多还原