In order to improve the spinning efficiency, the spinning experiments cellulose/1-butyl-3-methylimidazolium chloride ([BMIM]Cl) solutions were done by increasing spinning speed. It is found that the tenacity and initial modulus of regenerated cellulose fibers increased while the elongation at break decreased a little with increasing the spinning speed although the draw ratio kept constant. Further, the synchrotron WAXD and SAXS were carried out to illustrate the relationship between the structure and mechanical properties. It is shown that the crystal orientation, crystallinity as well as orientation of the microvoids along the fiber increased with the spinning speed while the diameter of the microvoids in the fiber decreased. From the analysis of the spinline stress, it is clear that the spinline stress increased when both extruding and draw speed increased to keep the draw ratio constant, which leads to improve the supra molecular structure and mechanical properties of the regenerated cellulose fibers.

Structure and properties changes of regenerated cellulose fibers with solvent of 1-butyl-3-methylimidazolium chloride as spinning speed increasing

243rd National Meeting (2012)

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