高等学校化学学报

高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (12): 2330.

• 研究简报 • 上一篇    

热塑性甲壳素衍生物N,O-苄基壳聚糖的合成及表征

董炎明1, 郭振楚2, 吴玉松1, 阮永红1, 童碧海2, 赵雅青1, 王惠武1   

  1. 1. 厦门大学材料科学与工程系, 厦门 361005;
    2. 湘潭师范学院化学系, 湘潭 411001
  • 收稿日期:2002-09-10 出版日期:2003-12-24 发布日期:2003-12-24
  • 通讯作者: 董炎明(1947年出生),男,教授,博士生导师,从事高分子液晶和甲壳素的研究.E-mail:ymdong@xmu.edu.cn E-mail:ymdong@xmu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:29974023)资助

Synthesis and Characterization of Thermoplastic Chitin Derivative N,O-Benzyl Chitosan

DONG Yan-Ming1, GUO Zhen-Chu2, WU Yu-Song1, RUAN Yong-Hong1, TONG Bi-Hai2, ZHAO Ya-Qing1, WANG Hui-Wu1   

  1. 1. Department of Materials Science and Engineering, Xiamen University, Xiamen 361005, China;
    2. Department of Chemistry, Xiangtan Teachers College, Xiangtan 411001, China
  • Received:2002-09-10 Online:2003-12-24 Published:2003-12-24

PDF (PC)

被引次数

10

关键词: 甲壳素, 壳聚糖, 热塑性, 苄基化壳聚糖, 熔融

Abstract: Chitin derivatives are difficult to be melten because of their very strong inter-molecular and intra-molecular hydrogen bonds. In this paper, N,O-benzyl chitosan was synthesized by means of phase-transfer method. The total degree of substitution for this derivative was 0.8 as determined with 1HNMR and the degree of substitution on nitrogen was 0.3 as determined with elemental analysis. This is a thermoplastic chitin derivative. It's melting point was 470 Kas measured with DSC. Aviscous isotropic melt occurred at the temperatures between the melting point and the decomposition temperature(513K) while N,O-benzyl chitosan was heated on a hot stage. DSC results agreed with the results of microscopy observation. The benzyl group can not form hydrogen bonds. It is also non-polar and has larger volume. These factors weaken the interactions between chitosan chains, and therefore decrease the melting point, which was lower than the decomposition temperature. As a result, N,O-benzyl chitosan was able to melt.

Key words: Chitin, Chitosan, Thermoplasticity, Benzyl chitosan, Melt

中图分类号: 

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