One-pot lignin extraction and modification in γ-valerolactone from steam explosion pre-treated lignocellulosic biomass
One-pot lignin extraction and modification in γ-valerolactone from steam explosion pre-treated lignocellulosic biomass
复制标题
DOI：
10.1016/j.jclepro.2017.03.062
复制
发表时间：
2017-05
影响因子：
11.1
通讯作者：
S. Angelini;D. Ingles;M. Gelosia;P. Cerruti;Enrico Pompili;G. Scarinzi;G. Cavalaglio;F. Cotana;M. Malinconico
中科院分区：
文献类型：
--
作者：
S. Angelini;D. Ingles;M. Gelosia;P. Cerruti;Enrico Pompili;G. Scarinzi;G. Cavalaglio;F. Cotana;M. Malinconico
本文提出了从预处理的芦苇木质纤维素生物质中提取木质素并对其进行化学改性的一锅法路线。木质纤维素生物质首先通过蒸汽爆破以两种不同的苛刻度因子进行预处理。采用微波辅助有机溶剂萃取法，以γ-戊内酯为溶剂，从蒸汽爆破后的生物质中提取木质素。最严重的蒸汽爆破条件产生78%的脱木质素。形态分析、光谱分析和热分析表明，该工艺提取的木质素基本上是纯木质素。然后在γ-戊内酯提取液中通过乙酰化和Mannich缩合对木质素进行化学改性。这项工作提供了证据证明，纯木质素可以从预处理的生物质中以高产率进行溶剂提取，而无需添加任何其他化学品，并通过更清洁的工艺在一锅路线中成功地进行改性。改性后的木质素可作为新型生物基高分子材料的结构单元。
A one-pot route to extract and chemically modify lignin from a pre-treatedPhragmites australislignocellulosic 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 γ-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 γ-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.