丝素蛋白氧化棉纤维的共价结构分析

用高碘酸钠选择性氧化棉纤维制得二醛纤维素,并采用FT-IR、XPS法分析了高碘酸钠选择性氧化棉纤维及经丝素蛋白溶液处理后氧化棉纤维的结构。结果表明:棉纤维经高碘酸钠选择性氧化生成了二醛纤维素(DAC),并且二醛纤维素上的醛基随着氧化程度的加深不断增多,氧化后纤维素大分子中的羟基及氢键结构逐渐减少,表明氧化的过程也是棉纤维大分子不断解聚的过程;氧化棉纤维经丝素蛋白溶液处理后,二醛纤维素上的醛基与丝素大分子上的氨基直接形成亚胺(席夫碱)结构。

Covalence structure of oxidized cotton fiber treated by fibroin solution

Study on oxidizing cotton fiber to oxycellulose by sodium periodate solution was carried out, and FT-IR, XPS were used to analyze the micromechanism of oxidized cotton fiber and the oxidized cotton fiber treated by fibroin solution. It was indicated that dialdehyde cellulose was gained after oxidizing, the aldehyde was increased, hydroxy and hydrogen bond was decreased and the cellulose molecule was degraded during oxidizing; imine covalence formed between aldehyde group and amido when oxidized cotton fiber was treated by fibroin solution.