journal6 ›› 2003, Vol. 24 ›› Issue (2): 20-22.

• 化学化工 • 上一篇    下一篇

N-烷基壳聚糖的羽毛状结晶

  

  1. (厦门大学材料科学与工程系,福建 厦门361005)
  • 出版日期:2003-06-15 发布日期:2012-11-07
  • 作者简介:董炎明(1947-),男,福建省厦门市人,厦门大学材料科学与工程系教授,博士生导师,主要从事高分子液晶和天然高分子甲壳素研究.
  • 基金资助:

    国家自然科学基金资助项目(29974023)

Feather-like Crystals of N-Alkyl Chitosan

  1. (Department of Materials Science and Engineering,Xiamen University,Xiamen 361005,Fujian China)
  • Online:2003-06-15 Published:2012-11-07

摘要:将N-甲基壳聚糖或N-乙基壳聚糖的甲酸溶液在高真空中浇铸成膜.然后将浇铸膜在25 ℃和65%相对湿度的环境中结晶化得到羽毛状结晶.这种羽毛状结晶不同于低真空处理的浇铸膜内生长的球晶.除了形态不同外,双折射符号也完全不同,前者是负的,而后者是正的.羽毛状结晶应是树枝状结晶的一种,但前者的晶带是弯曲的,而后者的晶带基本上是直的.

关键词: 壳聚糖, N-烷基壳聚糖, 结晶形态, 晶片, 树枝状结晶

Abstract: The N-methyl chitosan or N-ethyl chitosan was cast into films at high vacuum.Then the cast film crystallized at 25 ℃ and 65% relative humidity and the feather-like crystals appeared.The feather-like crystals were different with spherulites,which grew in the films cast at low vacuum.In addition to morphology,the birefrigence nature of feather-like crystals and spherulites was completely different.The former was negative,but the latter was positive.The feather-like crystals were believed to belong to one kind of dendritic crystals.

Key words: chitosan, N-alkyl chitosan, crystalline morphology lamella, dendritic crystals

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