Abstract: Cotton-stalk was divided into three sections through observing cotton-stalk bark appearance and testing constituents of different cotton-stalk sections bark. One-step degumming technology was used for obtaining natural cellulose fibers from cotton-stalk. Through Orthogonal experiment and orthogonal method of fuzzy comprehensive evaluation method , and based on fibers fineness, tensile breaking strength, residual gum content and flexibility, natural cellulose fibers from different cotton-stalk sections were obtained. Experimental results showed that the degumming parameters of first cotton-stalk section were NaOH content 35g/l, temperature 100℃, time 2.5h, and H2O2 content 10ml/l; the degumming parameters of second cotton-stalk section were NaOH content 30g/l, temperature 100℃, time 2h, and H2O2 content 10ml/l , and the degumming parameters of third cotton-stalk section were NaOH content 30g/l, temperature 90℃, time 2.5h, and H2O2 content 8ml/l. The morphology of the fibers obtained from different cotton-stalk sections was observed using JSM-6460LV S.E.M. It was shown that the cellulose fiber was technical fiber, and the surface of the fiber was not smooth, the apparent fineness was not uniform.

Key words: cotton-stalk, degumming, cellulose fiber, morphology