Abstract
This study investigated the effects of cellulose concentration dissolved in 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) and N,N-dimethylformamide (DMF) on the properties of cellulose solution and beads. Cellulose beads were prepared using the dropping method. The cellulose solution dissolved in [Bmim]Cl and DMF (mixing ratio=70:30) did not gel for 12 h and exhibited shear thinning behavior. Increasing the cellulose concentration increased the viscosity and surface tension of the cellulose solution. Cellulose beads, 600-1000 μm in size, were prepared by varying the cellulose concentration in the range of 2-4% and the syringe needle diameter in the range of 0.3-0.9 mm using the dropping method. The particle size of the beads increased with increasing cellulose concentration and diameter of the syringe needle. The cellulose concentration had no remarkable effect on the chemical structure, crystallinity, and thermal stability of cellulose.
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