Journal
POLYMER DEGRADATION AND STABILITY
Volume 121, Issue -, Pages 331-339Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2015.09.009
Keywords
Chitosan; Hydrolysis; 5-Hydroxymethylfurfural; Ionic liquid; Hydrothermal synthesis
Categories
Funding
- Tianjin National Natural Science Foundation [11JCZDJC21300]
- National Natural Science Foundation of China [21346001]
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A new process for the efficient conversion of chitosan into 5-hydroxymethylfurfural (5-HMF) has been developed. Chitosan was hydrolyzed in the presence of acidic ionic liquids (ILs), with N-methyl imidazolium hydrogen sulfate ([MIM]HSO4) giving the best results. The effects of reaction time, temperature and quantity of water and IL were investigated in detail. The optimal reaction conditions were found to be 4wt % IL ([MIM]HSO4) aqueous solution under hydrothermal condition, 180 degrees C and a reaction time of 5 h. A yield of 29.5 mol% 5-HMF was obtained from 100 mg chitosan. Furthermore, chitosan with different molecular weight could be directly converted into 5-HMF in good yields under these conditions. More importantly, [MIM]HSO4 could be recovered by simple post-processing and exhibited constant activity over 5 cycles. (C) 2015 Elsevier Ltd. All rights reserved.
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