| 分子量对壳聚糖溶致液晶性的影响 |
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| 引用本文： | 汪剑炜,董炎明,刘晃南,袁清,梅雪峰. 分子量对壳聚糖溶致液晶性的影响[J]. 高等学校化学学报, 1999, 20(3): 474-477 |
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| 作者姓名： | 汪剑炜 董炎明 刘晃南 袁清 梅雪峰 |
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| 作者单位： | 厦门大学材料科学系, 厦门 361005 |
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| 基金项目： | 中国科学院纤维素化学研究开放实验室资助 |
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| 摘 要： | 三种不同分子量的壳聚糖[脱乙酰度均为(84±1)%]在二氯乙酸溶液中都呈现胆甾型溶致液晶相.临界浓度随分子量增加而降低,但均比同样聚合度的甲壳素的高.用偏光显微镜法和激光小角散射法测得的胆甾液晶相的螺距很相近,在浓度相同时,其值随分子量的增加而减小.
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| 关 键 词： | 壳聚糖 分子量 溶致液晶 胆甾相 脱乙酰度 |
| 收稿时间： | 1998-07-12 |
Influence of Molecular Weight of Chitosan on Liquid Crystalline Behavior |
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| WANG Jian-Wei,DONG Yan-Ming,LIU Huang-Nan,YUAN Qing,MEI Xue-Feng. Influence of Molecular Weight of Chitosan on Liquid Crystalline Behavior[J]. Chemical Research In Chinese Universities, 1999, 20(3): 474-477 |
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| Authors: | WANG Jian-Wei DONG Yan-Ming LIU Huang-Nan YUAN Qing MEI Xue-Feng |
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| Affiliation: | Department of Materials Science, Xiamen University, Xiamen, 361005 |
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| Abstract: | The lyotropic cholesteic liquid crystalline phase was observed in the dichloroacetic acid solutions of the three chitosans with different molecular weights from 2.3410+6 to {0.4410+6} but with the same degree of deacetylation. The critical concentration of chitosan decreased when its molecular weight increased and was higher than chitin with the same degree of polymerization. The value of average pitch obtained by both small angle light scattering and polarized microscopy decreased when the molecular weight of chitosan increased. |
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| Keywords: | Chitosan Molecular weight Lyotropic liquid crystal Cholesteic phase Degree of deacetylation= (Ed.: H L) |
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