科研之友
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摘要
A novel cellulose-chitosan gel was successfully prepared in three steps: (1) ferrocene-(Fc-) cellulose with degrees of substitution (DS) of 0.5 wt% was synthesised by ferrocenecarboxylic acid and cellulose within dimethylacetamide/lithium chloride (DMAc/LiCl); (2) the beta-cyclodextrin (beta-CD) groups were introduced onto the chitosan chains by reacting chitosan with epichlorohydrin in dimethyl sulphoxide and a DS of 0.35wt%; (3) thus, the cellulose-chitosan gel was obtained via an intermolecular inclusion interaction of Fc cellulose and beta-CD-chitosan in DMA/LiCl, that is, by an intermolecular inclusion interaction, between the Fc groups of cellulose and the beta-CD groups on the chitosan backbone at room temperature. The successful synthesis of Fc-cellulose and beta-CD-chitosan was characterised by C-13-NMR spectroscopy. The gel based on beta-CD-chitosan and Fc-cellulose was formed under mild conditions which can engender autonomous healing between cut surfaces after 24 hours: the gel cannot self-heal while the cut surfaces were coated with a solution of a competitive guest (adamantane acid). The cellulose-chitosan complex made by this method underwent self-healing. Therefore, this study provided a novel method of expanding the application of chitosan by binding it with another polymer.
- 出版日期2015
- 单位北京林业大学
