University of Oulu

Dong, Y., Takeshita, T., Miyafuji, H., Nokami, T., Itoh, T. (2018) Direct Extraction of Polysaccharides from Moso Bamboo (Phylostachys heterocycla) Chips Using a Mixed Solvent System of an Amino Acid Ionic Liquid with Polar Aprotic Solvent. Bulletin of the Chemical Society of Japan, 91 (3), 398-404. doi:10.1246/bcsj.20170383

Direct extraction of polysaccharides from moso bamboo (Phylostachys heterocycla) chips using a mixed solvent system of an amino acid ionic liquid with polar aprotic solvent

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Author: Dong, Yue1,2,3; Takeshita, Tokio2; Miyafuji, Hisashi4;
Organizations: 1Research Unit of Sustainable Chemistry, University of Oulu
2Department of Chemistry and Biotechnology, Graduate School of Engineering, Tottori University
3Centria University of Applied Sciences
4Division of Environmental Sciences, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University
5Center for Research on Green Sustainable Chemistry, Tottori University
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.2 MB)
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Language: English
Published: The Chemical Society of Japan, 2018
Publish Date: 2018-03-08


The cellulose-dissolving ability and some physical properties of mixed solvents of an amino acid IL, N-methyl-N-(2-methoxyethyl)pyrolidin-1-ium 2,6-diaminohexanoate ([P1ME][Lys]), with polar aprotic solvents, such as 1,3-dimethylimidazolidinone (DMI), N,N-dimethylformamide (DMF), dimethylsulfoxide (DMSO), and acetonitrile (CH₃CN), have been investigated. The viscosity was significantly reduced by the increasing content of polar aprotic solvents, and a 1:1 mixture (molar ratio) of [P1ME][Lys] with DMF showed 91.5 cP which corresponded to less than 1/10 compared to that of the pure IL at 25 °C (1058 cP). The β values of the mixed solvents, which have the IL contents over 0.1, exhibited β-values similar to that of the pure IL. On the other hand, the π-value was dependent on the ratio of the IL content, and the pure IL had the highest π-value. We found that the mixed solvent of [P1ME][Lys] with DMF (1:1) easily dissolved the cellulose and the mixed solvent could be used to extract cellulose from moso bamboo (Phylostachys heterocycla) powder. The efficiency of the extraction of cellulose from the bamboo powder was significantly increased when a 1:1 mixture of the IL with a polar aprotic solvent was used as the extracting solvent at 60 °C; the extraction ratio of the 1:1 mixture (IL: DMF) reached twice that of the pure IL. We thus obtained cellulose in 18% (w/w) yield from the bamboo powder.

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Series: Bulletin of the Chemical Society of Japan
ISSN: 0009-2673
ISSN-E: 1348-0634
ISSN-L: 0009-2673
Volume: 91
Issue: 3
Pages: 398 - 404
DOI: 10.1246/bcsj.20170383
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
Funding: The present study was supported by JSPS KAKHNHI KIBAN (A) Grant Number (No. 26241030).
Copyright information: Copyright © 2017 The Chemical Society of Japan. All Rights Reserved. Published in this repository with the kind permission of the publisher.