Study On Mechanical Of Regenerated Bamboo Fibers

Lyocell Fibers spun made by bamboo cellulose as raw material are not reported as yet. Exploring investments were done in this paper. Bamboo cellulose/NMMO-H₂O solutions were prepared with various bamboo celluloses as raw material and NMMOH₂O as solvent firstly, and the rheology properties of these solutions are investigated with HAKKE RS150 rheometer. The results showed that bamboo cellulose spinning dope were shear thinning liquid, with increasing of average DP of bamboo cellulose pulps, the flow curves moved upward, and the shear rate are reduced, the Non-Newton parameters (n) decreased, while the viscous flow activating energy, structural viscosity and zero shear rate viscosity increase. And the appropriate bamboo cellulose pulps for spinning were selected.On the base of investigation of dissolution of bamboo cellulose pulps and rheology properties of solutions, the influence of spinningconditions structures and properties on the bamboo cellulose fibers was further studied in this paper. And the structures of Lyocell bamboo cellulose fibers are characterized by X-ray was diffraction (Rigaku/Dmax-B) and birefringence Olympus XP51 polarizing microscope with Berek compensatory. The results showed that the bamboo cellulose dope was the most appropriate for spinning when 1# pulp was used and the concentration of cellulose was 11%. The length of air gap should be 5cm because too long and short would lead to poor mechanical properties. And when the draw ratio of spinning was fixed, tenacity and modules of the fiber will be increasing, while elongation decreasing and fine was unchanged along with spinning speed increasing, since the crystallinity and orientation of amorphous part increasing. And along with the temperature of coagulation bath increasing, the module of fiber increasing due to the crystallinity increasing, while tenacity decreased due to the orientation of amorphous part decreasing.Furthermore, the spinning process condition also influenced the dying properties of Lyocell bamboo cellulose fibers. And the fibrillation properties of bamboo Loycell were measured by wet-abration number. The negative-ion was measured by IC-1000 negative-ion instruction (Japan) in this paper. The data showed that in the experimental area of this paper, the dying properties of the fiber improved obviously when the temperature of coagulation bath was comparatively low. Increasing thespinning speed had little influence on the dying properties if the draw ratio of spinning was same. The anti-fibrillablity of Lyocell bamboo cellulose fiber was better than the Lyocell fiber from wood pulp. And the fiber had negative-ion.The work in this paper proved that it is possible to use Lyocell technology to process appropriate bamboo cellulose pulp making regenerated bamboo fiber. The regenerated bamboo fibers spun by Lyocell process not only had the good mechnical properties which the Lyocell fibers form wood pulp had, but also had some special properties of bamboo material, like cool feeling, smooth, scented and having negative-ionic, etc.