期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 124, 期 -, 页码 314-320出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2018.11.138
关键词
Cellulose; Regeneration; Anti-solvent; Ionic liquid; 1-Ethyl-3-methylimidazolium acetate; Crystalline structure
资金
- Guangzhou Science and Technology Program key projects [201804020036]
- YangFan Innovative and Entrepreneurial Research Team Project [2014YT02S029]
- Open Project Program of Provincial Key Laboratory of Green Processing Technology and Product Safety of Natural Products [KL-2018-20]
- China Scholarship Council (CSC)
This work investigates the effect of different anti-solvents (water, ethanol, or both water and ethanol) on the characteristics of cellulose dissolved and then generated from 1-ethyl-3-methylimidazolium acetate ([Emim] [OAc]). Compared with original microcrystalline cellulose (MCC) granules, all regenerated celluloses showed a homogeneous, agglomerated macromorphology and had its crystalline structure transformed from original cellulose I to cellulose II. The regenerated cellulose using water (433%) had a higher degree of crystallinity than that using ethanol (13.5%), and a degree of crystallinity of 21.3% was obtained when an ethanol-water-ethanol treatment method was used. SAXS and FTIR results indicate that water as an anti-solvent could promote the rearrangement of cellulose molecular chains and the rebuilding of an ordered aggregated structure. Moreover, the regenerated cellulose with water showed better thermal stability than that of the samples regenerated using ethanol. Thus, our results suggest that the reconstitution of cellulose molecules during regeneration with various anti-solvents can affect the multiscale structures and properties of cellulose. (C) 2018 Published by Elsevier B.V.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据