多孔性淀粉基固体酸催化剂的制备及其对壳聚糖的降解性能  

Preparation of PCSA for degradation of chitosan in aqueous system

作　　者：韩金山 赵丽娜 汪源浩 李沅 曹亚峰 HAN Jinshan;ZHAO Lina;WANG Yuanhao;LI Yuan;CAO Yafeng(School of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian 116034,China)

机构地区：[1]大连工业大学轻工与化学工程学院,辽宁大连116034

出　　处：《大连工业大学学报》2020年第6期439-443,共5页Journal of Dalian Polytechnic University

基　　金：大连市青年科技之星项目(2017RQ130).

摘　　要：以淀粉为原料,通过碳化、化学活化和磺化制备了多孔性淀粉基固体酸催化剂(PCSA)。通过红外光谱、热重和扫描电镜、N2吸脱附等温仪等对PCSA的物理化学结构进行了表征。通过壳聚糖降解反应生成D-氨基葡萄糖的产率来评价催化剂的催化性能,研究了在水相体系中反应温度、反应时间、壳聚糖浓度和催化剂用量对壳聚糖降解的影响,实现了水相体系中D-氨基葡萄糖的高产率降解。在最佳降解条件下,D-氨基葡萄糖的产率达到90.23%,PCSA在6次循环使用后活性没有明显下降,具有很好的使用稳定性。A porous carbon-based solid acid catalyst(PCSA)was successfully prepared by carbonization,chemical activation and sulfonation of starch.The physical and chemical structures of PCSA were characterized by FT-IR,TG and SEM and BET techniques.In this work,the catalytic performance of the prepared catalyst was evaluated by degrading the chitosan into D-glucosamine.The effects of reaction temperature,time,concentration of chitosan and dosage of catalyst on the degradation rate of chitosan were investigated,and the high yield of D-glucosamine in aqueous solution was achieved.Under the optimized conditions,the yield of D-glucosamine reached 90.23%.The PCSA had excellent stability,as confirmed by the scarcely changed yield of D-glucosamine catalyzed six times recycle.

关 键 词：淀粉 壳聚糖 D-氨基葡萄糖 多孔性 降解 

分 类 号：TQ314.1[化学工程—高聚物工业]