壳聚糖凭借独特的抑菌作用、优越的成膜性和生物相容性在食品包装和保鲜方面有着极大的应用前景。熔融法是一种简单且环保的制备方法，但纯壳聚糖不具备熔融加工性即热塑性。壳聚糖熔融加工性的研究对于优化壳聚糖材料性能、提高材料制备方法的环保性乃至进一步推广其应用性都有着重要的意义。但目前有关热塑性壳聚糖制备的研究鲜有报道，其原因在于人们对壳聚糖加热塑化的机理还没有一个完整的认识。本项目通过固体核磁，结合SEM、XRD、DMA等测试手段，系统的研究壳聚糖的加热塑化行为。探索壳聚糖在溶剂作用下分子链段的运动、构型及构象的变化，溶剂分子在壳聚糖分子中的分布，溶剂分子在温度与剪切力作用下与壳聚糖的作用方式，揭示壳聚糖的塑化过程和揭示壳聚糖的塑化机理， 构建热塑性壳聚糖的结构与性能的构效关系。

Chitosan with unique antibacterial property, well film-forming property and biocompatibility, has a great application prospects in food packaging and preservation. The melting processing is a simple and environment-friendly preparation method, but the nature of chitosan does not have thermoplastic melt processability. Present studies rarely report about the preparation of thermoplastic chitosan, the reason being that the plasticizing mechanism of chitosan is not recognized. In this work, the plasticizing behavior of chitosan will be studied systematically by NMR, SEM, XRD, DMA and so on.By studying the plasticization conditions of chitosan, the interaction between different solvent, and plasticizer and chitosan under temperature and shearing force, plasticizing mechanism will be established. Furthermore, a new modification method and preparation method for chitosan material will be established.