| 水溶性低分子壳聚糖的制备 |
| |
| 引用本文： | 薛行华,郑向前,朱荣华,仇厚援.水溶性低分子壳聚糖的制备[J].热带作物学报,2005,26(4):83-85. |
| |
| 作者姓名： | 薛行华 郑向前 朱荣华 仇厚援 |
| |
| 作者单位： | 1. 华南热带农业大学理工学院,海南,儋州,571737
2. 华南热带农业大学基础学院,海南,儋州,571737 |
| |
| 基金项目： | 华南热带农业大学2004年校基金课题. |
| |
| 摘 要： | 考察了6种氧化体系对壳聚糖降解效果的影响，结果表明：H2O2／HCl／MnO2是壳聚糖的有效氧化降解体系，可使它降解生成水溶性低分子壳聚糖。研究了反应条件对水溶性壳聚糖分子质量和产率的影响，结果表明，分子质量随着反应温度的升高而增大，随脱乙酰度的增加而减小。随着反应时间的延长，水溶性壳聚糖的分子质量随之降低，产率却随之增加。H2O2和MnO2分别加入体系反应1．5h后，水溶性壳聚糖的分子质量下降到只有1476，而产率却高达94．6％。
|
| 关 键 词： | 壳聚糖 H2O2-HCl-MnO2氧化降解 |
| 收稿时间： | 2005-05-30 |
| 修稿时间： | 2005-10-21 |
Preparation of Water-soluble Chitooligosaccharides |
| |
| Xue Xinghua,Zheng Xiangqian,Zhu Ronghua,Qiu Houyuan.Preparation of Water-soluble Chitooligosaccharides[J].Chinese Journal of Tropical Crops,2005,26(4):83-85. |
| |
| Authors: | Xue Xinghua Zheng Xiangqian Zhu Ronghua Qiu Houyuan |
| |
| Affiliation: | 1 College of Technology, South China University of Tropical Agriculture, Danzhou, Hainan 571737; 2 College of Basic Sciences, South China University of Tropical Agriculture, Danzhou, Hainan 571737 |
| |
| Abstract: | The degradation effect of six kinds of oxidative system on chitosan was investigated. The result showed that H2O2/HCl/MnO2 was an effective oxidative degradation system on chitosan, and water-soluble chitooligosaccharides could be prepared. The effects of reaction conditions on molecular weight and yield of watersoluble chitosan were studied. The results showed that the molecular weight of water-soluble chitosan increased with reaction temperature, but decreased with the increase of deacetylation degree. The molecular weight also decreased with reaction time, but the yield of water-soluble chitosan increased with reaction time. 1.5 hours after hydrogen peroxide and manganese dioxide were respectively added into the reaction system, the molecular weight of watersoluble chitosan decreased as low as 1 476, but the yield increased as high as 94.6 %. |
| |
| Keywords: | chitosan H2O2-HCl-MnO2 oxidative degradation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
