期刊
JOURNAL OF CLEANER PRODUCTION
卷 151, 期 -, 页码 152-162出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2017.03.062
关键词
Green chemistry; Lignin extraction; gamma-valerolactone Chemical modification; Lignin-based material
资金
- MIUR [PON03PE_00107]
A one-pot route to extract and chemically modify lignin from a pre-treated Phragmites australis lignocellulosic biomass is proposed herein. The lignocellulosic biomass was first pre-treated through steam explosion at two different severity factors. Lignin was then extracted from the steam-exploded biomasses through a microwave-assisted organosolv extraction method, solely using gamma-valerolactone as solvent. The most severe steam explosion condition yielded a delignification of 78%. Morphological analysis, spectroscopic investigation and thermal characterization showed that essentially pure lignin was extracted through this process. Lignin was then chemically modified in the gamma-valerolactone extraction solution, through acetylation and Mannich condensation. This work provides proof-of evidence that pure lignin can be solvent-extracted in high yields from a pre-treated biomass without the addition of any further chemicals and successfully modified in a one-pot route through a cleaner process. The modified lignin could be used as building block for the development of novel bio-based polymer materials. (C) 2017 Elsevier Ltd. All rights reserved.
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