γ辐射制备壳聚糖衍生物及其性能研究

Study on preparation of chitosan derivatives under γ-ray radiation and its properties

壳聚糖(Cs)与甲基丙烯酸(MAA)在6γ0Co辐射源辐射下进行接枝共聚反应,制备了不同接枝率的共聚物,并用红外光谱(IR)和X射线衍射仪(XRD)进行了结构表征。以透明质酸(HA)、羧甲基壳聚糖(CM-Cs)为参照物,在一定相对湿度下考察了Cs、接枝共聚物(Cs-g-MAA)的保湿吸湿性能。实验结果表明:接枝共聚物钠盐(Cs-g-MAA1)的吸湿保湿性能最优,且接枝率越高吸湿保湿性能越好,完全可以替代透明质酸,作为食品的保湿剂。

Graft copolymers with different graft ratio were prepared by reaction of chitosan and methl acrylic acid under 60^Co radiation, and their structure was investigated by IR and XRD. By comparison with hyaluronic acid, carboxymethylchitosan, the moisture-adsorption and moisture-retention capacity of Cs and Cs-g-MAA were studied. The results indicate that Cs-g-MAA1 has the best capacity of moisture- adsorption and moisture-retention. Its capacity increases with the increase of graft ratio and can be used in food as a moisture-retention agent to substitute hyaluronic acid.