高等学校化学学报 ›› 2006, Vol. 27 ›› Issue (4): 787.

• 研究简报 • 上一篇    下一篇

去质子化调控的肝素/壳聚糖抗凝血多层膜

谭庆刚1,2, 林全愧1,2, 范德增3, 计剑1,2, 沈家骢1,2   

  1. 1.  浙江大学高分子科学与工程学系,   杭州 310027;  2.  教育部高分子合成与功能构造重点实验室, 杭州 310027; 3. 北京钢铁研究总院, 北京 100081
  • 收稿日期:2005-06-08 出版日期:2006-04-10 发布日期:2006-04-10
  • 通讯作者: 计剑(1969年出生), 男, 博士, 教授, 主要从事自组装仿生生物材料、 介入医用材料和组织工程材料研究. E-mail: jijian@zju.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 50373036)和教育部霍英东基金优选项目(批准号: J20040212)资助

Deionized Mediated Anticoagulant Heparin/Chitosan Multilayer Films

TAN Qing-Gang 1,2 , LIN Quan-Kui 1,2 ,  FAN De-Zeng 3,  JI Jian1,2*, SHEN Jia-Cong 1,2   

  1. 1. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China;
    2. Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education,
    Zhejiang University, Hangzhou 310027, China; 3. Central Iron & Steel Research Institute, Beijing 100081, China
  • Received:2005-06-08 Online:2006-04-10 Published:2006-04-10
  • Contact: JI Jian, E-mail: jijian@zju.edu.cn

摘要:

本文研究了环境pH值变化对多层膜表面性能的影响, 并且评价了组装pH值与测试pH值的差异对多层膜血液相容性的影响.

关键词:  层层自组装膜; 抗凝血; 去质子化

Abstract:

The influence of different pH values between assembly and application environment on  the surface properties of layer-by-layer assembled heparin and chitosan multilayer films was investigated. The high adsorption amount of cationic dye and  high wettability on the chitosan terminated multilayer films at high environment pH may indicate the  excess of free sulfate group existed  on the chitosan surface. Since the ionization degree of chitosan decreased with increasing of pH, the multilayer films assembled at low pH will lead to some excess free unpaired sulfate group in higher pH application environment, which paired with ionized amino group under prepared conditions. The blood-compatibility tests performed with these films clearly demonstrated that the good anticoagulant activity of low pH assembled heparin/chitosan even on the chitosan-terminated surface. Such an easy and controlled processing by the difference of pH values between assembly and application environment may have a good potential for fabrication of biomedical device coating.

Key words: Layer-by-layer assembled film; Anticoagulant; Deionization

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