高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (8): 1343.

• 研究简报 • 上一篇    下一篇

新的液晶性壳聚糖衍生物--氰乙基壳聚糖的合成与表征

董炎明, 李志强   

  1. 厦门大学化学系, 厦门, 361005
  • 收稿日期:1997-06-12 出版日期:1998-08-24 发布日期:1998-08-24
  • 通讯作者: 董炎明,男,49岁,硕士,副教授.
  • 作者简介:董炎明,男,49岁,硕士,副教授.
  • 基金资助:

    中国科学院纤维素化学开放研究实验室基金资助课题.

Synthesis and Characterization of a New Chitosan Derivatives with Liquid Crystalline Behavior--O-Cynaoethylchitosan

DONG Yan-Ming, LI Zhi-Qiang   

  1. Department of Chemistry, Xiamen University, Xiamen, 361005
  • Received:1997-06-12 Online:1998-08-24 Published:1998-08-24

摘要: 甲壳素是自然界蕴藏量最丰富的天然高分子化合物之一,但人们对它的了解却远不如纤维素和淀粉.仅就液晶领域而言,纤维素衍生物的液晶性早已为人们所认识,例如氰乙基纤维素的液晶性已有很多研究.

关键词: 壳聚糖, 氰乙基壳聚糖, 溶致液晶, 胆甾相, 临界浓度

Abstract: O-cyanoethylchitosan was prepared at room temperature using sodium hydroxide as catalyst. Solubility of O-cyanoethylchitosan was prior to chitosan. While it dissolved, O-cyanoethylchitosan formed typical cholesteric liquid crystalline texture--fingerprint texture. The fingerprint texture can be frozen in films casted from 5% aqueous acetic acid solution. The droplet texture of positive birefriengence can also be observed in these films. Critical concentrations of cyanoethylchitosan in four acidic solvents were determined using polarized microscopy. All critical concentration values were in the range of 19%~20%(volume fraction), independing of the acidity of solvents.

Key words: Chitosan, Cyanoethylchitosan, Lyotropic liquid crystal, Cholesteric phase, Critical concentration

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