不同交联剂含量对戊二醛交联壳聚糖膜结构与性 能影响的研究

1. 复旦大学高分子科学系.上海(200433);复旦大学聚合物分子工程教育部重点实 验室;复旦大学材料科学系.上海(200433)
• 发布日期:2000-12-15

Influence of crosslinking agent content on structure and properties of glutaraldehyde crosslinked chitosan membranes

Chen Xin;Shao Zhengzhong;Huang Yufang;Huang Yao;Zhou Ping;Yu Tongyin

1. Fudan University, Department of Macromolecular Science.Shanghai (200433);Fudan Univ, Dept of Material Sci.Shanghai(200433)
• Published:2000-12-15

the crystallinity, swelling ratio as well as Cu^2^+ adsorption capacity of glutaraldehyde crosslinked chitosan membranes have been studied. The glutaraldehyde content is varied from 0 to 5.0%. The lower glutaraldehyde content is, the smaller glutaraldehyde content interval changes. The results show that the crystallinity, swelling ratio and adsorption capacity reach the maximum when glutaraldehyde content in the membrane is 0.25%. This phenomenon is different from that reported in literatures which shows the crystallinity and swelling degree are decreased with an increase of glutaraldehyde content. It is suggested that low-level crosslinking might be favorable to a mre regular arrangement between chitosan molecular chains during membrane formation. Moreover, the increase of swelling ratio and adsorption capacity could be attributed to the increase of accessible amino group number while crosslinking taken palce.