酸处理条件对甲壳素/壳聚糖的理化性质的影响  

The effect of acid reaction variables on the performances of chitin/chitosan

作　　者：倪红[1] 杨艳燕[1] 陈怀新[1] 

机构地区：[1]湖北大学生命科学学院,湖北武汉430062

出　　处：《湖北大学学报（自然科学版）》2000年第4期374-377,共4页Journal of Hubei University：Natural Science

基　　金：湖北省重点科技研究资助项目

摘　　要：以桑蚕蛹滤渣 (桑蛋蛹提取蛹油和蛹蛋白后的过滤杂物 )为原料 ,在分离制备蛹甲壳素 /壳聚糖改进工艺的基础上 ,研究了浸酸脱盐条件及甲壳素氧化脱色条件对甲壳素 /壳聚糖的理化性质的影响 .结果表明 ,为了获得洁白度好、高粘度的壳聚糖产品 ,浸酸脱盐最适浓度、时间、温度分别为 1.0mol/L、0 .5h、室温 ,分离提取的甲壳素可不经氧化脱色直接制备壳聚糖 ,这样既简化了工艺 ,又使壳聚糖产品的质量明显提高 :壳聚糖脱乙酰基度为 90 % ,粘度在 85 0mPa·s以上 ,粘均分子量为 1.1× 10 6Da ,达到日本、美国的壳聚糖质量标准 .Based on the improvement technology for isolating chitin/chitosan from silkworm pupa residues,investigated the influence of soaking acid condition and reaction condition of discoloration (oxidation) on physical-chemical properties of pupa chitin/chitosan. The results indicated that the best condition soaking residue in 1.0?mol/L HCl for 0.5?h at room temperature. Without oxidation discoloration, pupa chitosan with viscosity higher than 850?mPa·s,and degree of deacetylation (DD) than 90 percent, and molecular weight about 1.1×10 6 Da can be obtained. Isolated pupa chitosan using the best technology is light yellow white power. It has a comparable quality with those produced in Japan and United State according to the references.

关 键 词：酸处理条件 甲壳素/壳聚糖 理化性质 桑蚕蛹滤渣 分离制备 浸酸脱盐 氧化脱色 制备工艺 

分 类 号：TQ281[化学工程—有机化工]