Abstract: In order to improve the effect of natural bamboo fiber degumming, the process of steam explosion and alkali boiling united degumming of bamboo fibers was researched, and the effect of process conditions on the degumming effect of the fibers was analyzed. FTIR, SEM and strength tester were used to analyse the chemical composition, morphology and strength of the united degummed fibers. The results showed that the effect of fibers steam explosion and alkali boiling united treated degumming was better than that of fibers single alkali boiling or steam explosion treated, the diameter of fiber reduced obviously. Furthermore, the more intense steam explosion conditions, the higher degumming rate, the more scattered, the better softness of the fibers. The hemicelluloses and lignin were removed from the fibers well, and the cellulose content rose to 63.59%, the strength and elongation of the bamboo fibers at break were 21.98 cN/tex, 3.56%, respectively.

Key words: natural bamboo fiber, steam explosion, aldali boiling, degumming