Fabrication of spherical lignin nanoparticles using acid-catalyzed condensed lignins
Fabrication of spherical lignin nanoparticles using acid-catalyzed condensed lignins
复制标题
使用酸催化缩合木质素制备球形木质素纳米颗粒
DOI：
10.1016/j.ijbiomac.2020.08.167
复制
发表时间：
2020-12-01
影响因子：
8.2
通讯作者：
Shen, Fei
中科院分区：
文献类型：
--
作者：
Chen, Yiyi;Jiang, Yuehan;Shen, Fei
木质素副产品的增值提高了当前木质纤维素生物炼制的整体经济性。这项工作表明，酸催化凝聚木质素片段制备具有球形结构的高价值木质素纳米颗粒（LNPs）具有很高的潜力。采用快速自组装法，对液体热水预处理的硬木白杨和桉树木质素、蒸汽预处理的软木白杨和草本玉米秸秆木质素4种浓缩木质素对LNPs的能力进行了评价。结果表明，不同的生物质种类和水热预处理方式对缩合芳烃含量（0.20 ~ 0.67mmol g(-1)）有不同的影响。所得LNPs的产率为17.5% ~ 29.4%，粒径范围为20 ~ 100 nm，在ph4 ~ 10条件下具有良好的悬浮稳定性。结果表明，高含量的凝聚木质素芳烃可以通过增强疏水相互作用为其自组装提供更多的锚点，从而获得粒径更均匀的LNPs。这项工作显示了通过LNPs生产向多产品木质纤维素生物精炼厂提高难固性凝聚木质素价值的技术机会。(C) 2020 Elsevier B.V.版权所有
Valorization of lignin by-products enhances the overall economics of current lignocellulose biorefinery. This work showed the high potential of fabricating acid-catalyzed condensed lignin fragments into high-value lignin nanoparticles (LNPs) with spherical structure. Four condensed lignins, i.e., liquid hot water pretreated hardwood aspen and eucalyptus lignin, steam pretreated softwood lodgepole pine and herbaceous corn stover lignin, were assessed for their abilities for LNPs using facile self-assembly method. Results showed the contents of condensed aromatics (0.20-0.67mmol g(-1)) were varied with biomass species and hydrothermal pretreatment methods selected. Those resulting LNPs exhibited yields from 17.5 to 29.4%, particle sizes ranging from 20 to 100 nm and considerable suspension stabilities at pH4-10. It was proposed that higher content of condensed lignin aromatics could provide more anchors available for their self-assembly through enhanced hydrophobic interactions, thus LNPs with more uniform particle size could be obtained. This work showed the technical opportunity to enhance the value of intractable condensed lignin through LNPs production towards a multi-product lignocellulose biorefinery. (C) 2020 Elsevier B.V. All rights reserved.