| 分子量及浓度对壳聚糖凝胶流变性能的影响研究 |
| |
| 引用本文： | 李永鹏,;张红平,;石荣铭,;贺攀,;仲文伊.分子量及浓度对壳聚糖凝胶流变性能的影响研究[J].西南科技大学学报,2014(4):1-4. |
| |
| 作者姓名： | 李永鹏 ;张红平 ;石荣铭 ;贺攀 ;仲文伊 |
| |
| 作者单位： | [1]西南科技大学生物质材料教育部工程研究中心,四川绵阳621010; [2]四川大学高分子材料与工程国家重点实验室,四川成都610000 |
| |
| 基金项目： | 国家自然科学基金青年基金（31300793） |
| |
| 摘 要： | 通过流变学测试,分析了分子量和浓度对壳聚糖凝胶的影响,结果表明大分子量和高浓度具有协同促进凝胶形成的作用。分子量和浓度主要通过加大分子链间的物理缠结作用和提高分子链密集交联程度来增强壳聚糖凝胶的力学性能,当壳聚糖分子量高于30万时,促进凝胶作用的主导因素是浓度,而分子量低于30万时,促进凝胶作用的主导因素是分子量,在大分子量低浓度的条件下可以达到低分子量高浓度的凝胶效果。
|
| 关 键 词： | 壳聚糖 流变学 凝胶 缠结 交联 |
On Effects of Molecular Weight and Concentration on the Rheological Properties of Chitosan Gel |
| |
| Institution: | LI Yong - peng, ZHANG Hong - ping, SHI Rong - ming , HE Pan, ZHONG Wen- yin (1. Engineering Research Center of Biomass Materials, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, Sichuan , China ; 2. State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610000, Sichuan, China) |
| |
| Abstract: | The influence of different molecular weight and concentration on chitosan gel was analyzed by rheological tests. Results show that the larger molecular weight and higher concentration has a synergistic effect on the formation of chitosan gel, mainly by increasing the physical entanglement interaction and the degree of crosslinking density of molecular chains to enhance the mechanical properties. Moreover, the gel concentration plays a dominant role in promoting the formation of ehitosan gel when the molecular weight was greater than 3 × 105, otherwise the molecular weight was the main factor. Meanwhile, the gelling effect of low concentration with high molecular weight is equal to that of high concentration with low molecular weight. |
| |
| Keywords: | Chitosan Rheology Gel Entanglement Crosslinking |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
