高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (1): 153.

• 研究简报 • 上一篇    下一篇

壳聚糖/二氯乙酸溶致液晶的热致相转变

胡钟鸣1, 李瑞霞1, 吴大诚1, 孙玉山2, 刘洪斌2, 吴立衡2   

  1. 1. 四川联合大学纺织工学院, 成都 610065;
    2. 中国纺织科学研究院, 北京 100025
  • 收稿日期:1998-03-30 出版日期:1999-01-24 发布日期:1999-01-24
  • 基金资助:

    国家自然科学基金

Thermotropic Phase Transition of Liquid Crystalline Solution of Chitosan/Dichloroacetic Acid

HU Zhong-Ming1, LI Rui-Xia1, WU Da-Cheng1, SUN Yu-Shan2, LIU Hong-Bin2, WU LI-Heng2   

  1. 1. Textile College, Sichuan Union University, Chengdu, 610065;
    2. China Textile Academy, Beijing, 100025
  • Received:1998-03-30 Online:1999-01-24 Published:1999-01-24

摘要: 关于壳聚糖及其各种衍生物的溶致液晶的研究已有报道[13],但尚未见到有关壳聚糖/有机酸液晶溶液的热致相转变的报道.本文研究了壳聚糖/二氯乙酸液晶溶液的相转变,并探讨了该体系的相转变机理.

关键词: 壳聚糖, 溶致液晶, 热致相转变, 成核机理

Abstract: The thermotropic phase transition of liquid crystaLIne solution of chitosan/dichloroacetic acid(DCA) was st udied by means of DSC.When The polymer concentrationc, was higher t han the crit ical one, c*, an clear endothermal peak attributed to The anisot ropicisot ropic phase t ransition of chitosan solution was observed on DSC heating trace.The exothermal peak was obviously observed on DSC trace upon cooling from above the 五笔字型电子计算机汉 clearing-t emperature because of The reverse phase t ransition.It was found that The lyotropic solution of chitosan/DCAcan exhibit Thermotropic behavior and The liquid crystalline phase form ation in solution is also nucleation cont rolled.Similar to The crystaLIne polymer, The thermotropic phasetransition for liquid crystaline solution of chitosan/dichloroacetic acid is influenced by history of the liquid crystalline phase formation.In addition, The Thermotropic phaset ransition was verified by The polarized light microscopy observation as well as by the changes of depolarizing t ransmit tance intensity as The function of temperature.

Key words: Chitosan, Lyotropic liquid crystal, Thermotropic phase transition, Nucleation mechanism

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