| 초록 |
Cellulose is one of the most abundant biopolymer on earth. Bacterial cellulose (BC), produced by Acetobacter xylinum, is widely studied, because of its unique structure, chemical purity and high crystallinity, which distinguishes this cellulose from that from plants. Those also bring more difficulties to process in solution, because of its large proportion of intra- and inter-molecular hydrogen bonds. In this study, regenerated BC fibers are prepared from nonvolatile room temperature ionic liquid (RTIL) solvents by electrospinning. Microns to nanometer sized fibers were obtained from 5% (w/w) concentration of BC in RTIL solution with an applied high voltage. And ethanol was employed as a coagulation bath to protect fibers from collapse. The morphology of the composite fibers was observed by SEM and the measurements on WAXD and Raman indicated that the electrospun cellulose fibers were almost amorphous with a little crystallization, which was totally different from the native cellulose. |
