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Effect of anti-solvents on the characteristics of regenerated cellulose from 1-ethyl-3-methylimidazolium acetate ionic liquid

Lookup NU author(s): Professor David XieORCiD

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).


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.


Publication metadata

Author(s): Tan X, Chen L, Li X, Xie F

Publication type: Article

Publication status: Published

Journal: International Journal of Biological Macromolecules

Year: 2019

Volume: 124

Pages: 314-320

Print publication date: 01/03/2019

Online publication date: 16/11/2018

Acceptance date: 14/11/2018

Date deposited: 23/05/2023

ISSN (print): 0141-8130

ISSN (electronic): 1879-0003

Publisher: Elsevier

URL: https://doi.org/10.1016/j.ijbiomac.2018.11.138

DOI: 10.1016/j.ijbiomac.2018.11.138


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