脱胶方法对棉秆皮纤维成分及结构的影响

Influence of degumming methods on constituents and structure of cotton bast fibers

对原棉秆皮不同部位进行化学成分分析,利用常温水沤、常压脱胶及高压脱胶对棉秆皮进行处理,对脱胶后棉秆皮进行化学成分分析。实验结果表明:高压脱胶后棉秆皮纤维中的半纤维素和木质素含量下降最为明显,纤维素含量提高。对不同方法处理后的棉秆皮纤维的长度、线密度进行测量,用SEM、FT-IR、XRD对处理后的棉秆皮纤维表面形态结构、聚集态结构进行了表征,同时对脱胶后的棉秆皮纤维进行强伸性能等测试并得出断裂曲线。

Chemical constituents in different parts of cotton methods for cotton bast fiber, such as retting, degumming pressure were investigated, and the chemical constituents of bast fiber were studied. The different degumming with normal pressure, and degumming with high degummed cotton bast fiber were also discussed. The experimental results demonstrated that after high pressure degumming, the contents of hemi-cellulose and lignin of the cotton bast fiber have reduced obviously. The content of cellulose was increased. Length and fineness of cotton bast fiber after different degumming methods were measured. The morphology and structure of degummed cotton bast fiber were examined by SEM, FT-IR and WAXD analysis. Meanwhile, the stress and strain of the degummed fibers were also tested, and rupture curve was shown.