Abstract
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 (43.3%) 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.
| Original language | English |
|---|---|
| Pages (from-to) | 314-320 |
| Number of pages | 7 |
| Journal | International Journal of Biological Macromolecules |
| Volume | 124 |
| DOIs | |
| Publication status | Published - 1 Mar 2019 |
Funding
This work is supported by the Guangzhou Science and Technology Program key projects (No. 201804020036 ), the YangFan Innovative and Entrepreneurial Research Team Project ( 2014YT02S029 ), and the Open Project Program of Provincial Key Laboratory of Green Processing Technology and Product Safety of Natural Products ( KL-2018-20 ). Part of this research was undertaken on the SAXS/WAXS beamline at the Australian Synchrotron, Victoria, Australia. X. Tan also would like to thank the China Scholarship Council (CSC) for the financial support for his visiting studies at The University of Queensland (UQ) as part of his PhD work.
| Funders | Funder number |
|---|---|
| Open Project Program of Provincial Key Laboratory of Green Processing Technology and Product Safety of Natural Products | KL-2018-20 |
| Guangdong Innovative and Entrepreneurial Research Team Program | 2014YT02S029 |
| University of Queensland | |
| Guangzhou Science and Technology Program key projects | 201804020036 |
| China Scholarship Council |
Keywords
- 1-Ethyl-3-methylimidazolium acetate
- Anti-solvent
- Cellulose
- Crystalline structure
- Ionic liquid
- Regeneration
ASJC Scopus subject areas
- Structural Biology
- Biochemistry
- Molecular Biology
- Economics and Econometrics
- General Energy