壳聚糖氧化自组装膜的制备及其性能

由高碘酸钠和壳聚糖溶液反应,成功制备出壳聚糖氧化自组装膜。采用傅立叶变换红外光谱(FTIR)和X射线衍射法对氧化自组装膜进行了结构表征,并对膜的吸水率及其力学性能进行了测试。当壳聚糖为3 g,而高碘酸钠加入量等于0.010 g时,得到壳聚糖氧化自组装膜的最佳的抗张强度,干膜为54.32 MPa,湿膜为29.11 MPa,相对壳聚糖膜分别提高了17.52%和26.78%;并且得到了最佳的阻水性,其吸水率为78.51%,相对于壳聚糖膜降低了6.88%。

The Properties and Preparation of Oxidized Self-assembled Chitosan Films

Oxidized self-assembled chitosan films were successfully prepared by the reaction between sodium periodate and chitosan.Oxidized self-assembled chitosan filmes were characterized by FTIR and XRD.Their water-absorbability and mechanical properties were measured.The results indicated that the tensile strength of the oxidized self-assembled films was considerately improved.When 0.010 g sodium periodate and 3 g chitosan were added,the optimal mechanical property was obtained,and the tensile strengths in dry and wet states of the film were respectively 54.32 MPa and 29.11 MPa,which were respectively enhanced by 17.52% and 26.80% compared to the chitosan film;the optimal resistance to water was also obtained,and the water-absorbability was 78.51%,which was reduced by 6.88% compared to the chitosan film.