交联壳聚糖吸附树脂的制备

Preparation of Crosslinked Chitosan Resin

文章用甲醛交联壳聚糖制备了一种新型的吸附树脂,探讨了几种反应因素对交联率的影响,并进行了树脂的表征。结果表明,甲醛交联壳聚糖的反应主要发生在壳聚糖分子的氨基和羟基上;当壳聚糖与甲醛的质量比为1∶5,体系反应温度为60℃,反应时间为1 h,搅拌速率为440 r/min,pH为10时,可制得成球性好,耐酸性强的壳聚糖基树脂吸附材料。

With chitosan as the raw material, a new type of resin material is synthesized through formaldehyde crosslinking. The effects are studied in detail. The resin material is then characterized by means of IR. The results show that the reaction occurs mainly on the amino and the hydroxyl of chitosan. The chitosan-based resin material with good properties of sphericity and acidresistivity can be prepared under the optimal experimental conditions, which are found to be 1 ： 5 for the ratio ofchitosan and formaldehyde, 60℃ for the temperature, 1 h for the reaction time, 440 r/min for the stirring rate and 10 for the pH.