研究了以戊二醛作为交联剂,制备蚕蛹壳聚糖-谷氨酸阳离子交换树脂的方法,最佳工艺条件为:4 mL 25%戊二醛,m(蚕蛹壳聚糖)∶ m(L-谷氨酸)=1∶ 0.75,反应温度30 ℃,反应时间4 h. 产物为近圆形颗粒,有大量孔道. 堆积密度0.413 g/mL,失重率0.66%,含水率85.79%,溶胀度72.73%. 考察了该树脂对赖氨酸、瓜氨酸、Zn2+的交换能力. 对赖氨酸(Lys)、瓜氨酸和Zn2+的动态交换容量分别为188、191和421.5 mg/g(以干树脂计).
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