期刊
CARBOHYDRATE POLYMERS
卷 285, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2022.119260
关键词
Regenerated cellulose fibers; Wet-type electrospinning; Ionic liquids; Elution
资金
- Research Council of Lithuania [P-MIP-19-390]
This study presents an optimized fabrication process for cellulose fibrous matrix by wet electrospinning, aiming to avoid film-like structures. Different types of ionic liquids were used, and a range of elution ratios were applied to coagulate cellulose and remove residual ionic liquid. The resulting fibrous matrix exhibited various morphologies.
The importance of the cellulose cycle has been increasing during the last decade along the ambitious targets of bioeconomy, however many novel fabrication processes yet lack of technological robustness. We present the optimization process for the fabrication of cellulose fibrous matrix by wet electrospinning via the controlled removal of the ionic liquids in order to avoid the formation of film-like structures. Fibers were produced on a bespoke wet-type electrospinning rig from cotton cellulose solutions of 3% in different types of ionic liquids (BMIMAc/C10MIMCl/EMIMAc). Three stage elution with a range of elution ratios using deionized water were applied to coagulate cellulose and remove residuals of ionic liquid. A variety of fibrous morphologies has been obtained. In case of a high water/IL ratio, the median fiber width across all ionic liquids was 0.4 mu m, with the porosity at 92.3% and the pore diameter at 155 mu m. The increasing elution ratio positively affected separate cellulose fiber formation, crystallinity, and mechanical strength of formed structures.
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