高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (3): 474.

• 论文 • 上一篇    下一篇

分子量对壳聚糖溶致液晶性的影响

汪剑炜, 董炎明, 刘晃南, 袁清, 梅雪峰   

  1. 厦门大学材料科学系, 厦门 361005
  • 收稿日期:1998-07-12 出版日期:1999-03-24 发布日期:1999-03-24
  • 通讯作者: 董炎明
  • 作者简介:汪剑炜,男,28岁,讲师,硕士.
  • 基金资助:

    中国科学院纤维素化学研究开放实验室资助

Influence of Molecular Weight of Chitosanon Liquid Crystalline Behavior

WANG Jian-Wei, DONG Yan-Ming, LIU Huang-Nan, YUAN Qing, MEI Xue-Feng   

  1. Department of Materials Science, Xiamen University, Xiamen, 361005
  • Received:1998-07-12 Online:1999-03-24 Published:1999-03-24

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.

关键词: 壳聚糖, 分子量, 溶致液晶, 胆甾相, 脱乙酰度

Abstract: The lyotropic cholesteic liquid crystalline phase was observed in the dichloroacetic acid solutions of the three chitosans with different molecular weights from 2.34106 to 0.44106 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.

Key words: Chitosan, Molecular weight, Lyotropic liquid crystal, Cholesteic phase, Degree of deacetylation

中图分类号: 

TrendMD: