W.-Z. Li et al. / Carbohydrate Polymers 92 (2013) 228–235
235
The average crystallinity values of the cellulose sample and the
regenerated cellulose, determined to be 1.469 and 1.113 (repeated
five times), respectively, were lower than the values reported else-
where (Fu & Mazza, 2011). This could be explained by the fact that
AMIMCl broke inter- and intra-molecular hydrogen bonds during
the dissolution process, causing destruction of the original crys-
talline form. When regenerated, the cellulose was precipitated so
rapidly that there was insufficient time for cellulose to recover
its original crystalline form, causing incomplete self-assembly of
hydrogen bonds.
with ionic liquid from poplar wood. Bioresource Technology, 102,
9020–9025.
Krawczyk, H., Persson, T., Andersson, A., & Jönsson, A. S. (2008). Isolation of hemi-
celluloses from barley husks. Food Bioproducts Processing, 86(1), 31–36.
Lee, S. H., Doherty, T. V., Linhardt, R. J.,
& Dordick, J. S. (2009). Ionic liq-
uid mediated selective extraction of lignin from wood leading to enhanced
enzymatic cellulose hydrolysis. Biotechnology and Bioengineering, 102(5),
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4. Conclusion
Li, Q., He, Y. C., Xian, M., Jun, G., Xu, X., Yang, J. M., et al. (2009). Improv-
ing enzymatic hydrolysis of wheat straw using ionic liquid 1-ethyl-3-methyl
imidazolium diethyl phosphate pretreatment. Bioresource Technology, 100,
3570–3575.
Liu, D. T., Xia, K. F., Cai, W. H., Yang, R. D., Wang, L. Q., & Wang, B. (2012). Investigations
about dissolution of cellulose in the 1-allyl-3-alkylimidazolium chloride ionic
liquids. Carbohydrate Polymers, 87, 1058–1064.
We synthesized AMIMCl and investigated its value for the
extraction of cellulose from Z. japonica as a new approach for using
waste materials. Not only did the AMIMCl/DMSO solution easily
dissolve cellulose in grass, but it could be readily recovered through
coagulation after it was mixed with deionized water. Regeneration
of AMIMCl did not compromise its functionality. Regeneration of
cellulose was associated only with a loss of its crystallinity. Our
results suggest that AMIMCl is a novel, thermostable solvent with
potential applications in cellulose extraction from complex bioma-
terials.
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& Rector, K. D.
(2010). Ionic liquid pretreatment of poplar wood at room temperature:
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This work was supported by the Key Projects in the Science
& Technology Pillar Program of Tianjin, China (12ZCZDSF01700),
National Natural Science Foundation of China (70873065) and
‘Double five’ Science and Technology projects of colleges and uni-
versities in Tianjin, China (SW20080004).
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