微波条件下淀粉基固体酸对壳聚糖的降解性能  

The hydrolyzation of chitosan by a starch-based solid acid catalyst under microwave conditions

作　　者：陆雨婷 韩金山 杜倩瑶 汪源浩 李沅 曹亚峰 LU Yuting;HAN Jinshan;DU Qianyao;WANG Yuanhao;LI Yuan;CAO Yafeng(School of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian 116034,China;Xiamen Institute of Rare-earth Materials,Haixi Institutes,Chinese Academy of Science,Xiamen 361000,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 [2]中科院海西研究院厦门稀土材料研究所,福建厦门361000

出　　处：《大连工业大学学报》2019年第6期422-427,共6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,通过水热合成法与羟乙基磺酸、柠檬酸等反应制备了淀粉基固体酸催化剂;通过红外光谱、热重、扫描电镜、比表面积分析等对固体酸的物理化学性质进行了表征;将壳聚糖溶解在一定量的稀盐酸溶液中进行氨基的质子化,在微波辅助条件下研究了淀粉基固体酸催化剂降解壳聚糖制备D-氨基葡萄糖的性能;考察了反应时间、反应温度、微波功率、固体酸用量对壳聚糖降解性能影响。研究结果表明,当反应温度60℃、反应时间35 min、微波功率400 W、固体酸与壳聚糖质量比0.1∶1时,淀粉基固体酸降解壳聚糖制备D-氨基葡萄糖的产率达到95.3%,淀粉基固体酸催化剂在循环使用6次后仍可保持很好的反应活性。A starch-based solid acid catalyst was synthesized by hydrothermal carbonization of starch with 2-hydroxyethanesulphonic acid and citric acid. The physicochemical properties of catalyst were characterized by FT-IR, TG, SEM and BET techniques. The performance of prepared catalyst for hydrolyzing chitosan into D-glucosamine under microwave-assisted conditions was studied in dilute hydrochloric acid to dissolve chitosan and protonate amino groups. The effects of reaction time, temperature, power of microwave and the mass ratio of catalyst to chitosan on the hydrolysis of chitosan were investigated. The results showed that the yield of D-glucosamine was up to 95.3% under the conditions of 60 ℃, 35 min, microwave power 400 W and 0.1∶1 mass ratio of catalyst to chitosan. The starch based solid acid catalysts still maintained excellent catalytic ability after 6 times recyclization.

关 键 词：壳聚糖 淀粉 固体酸 催化剂 微波 

分 类 号：TQ314.1[化学工程—高聚物工业]