A two-step strategy promotes the dissolution of corn stover-based lignocellulosic biomass in DBU/CO2/DMSO solvent system

被引:0
作者
Gan, Jianyun [1 ]
Zhang, Lihua [1 ]
Xu, Qinqin [1 ]
Guo, Yuanlong [1 ]
Xie, Haibo [1 ]
机构
[1] Guizhou Univ, Coll Mat & Met, Dept Polymer Mat & Engn, Guiyang 550025, Peoples R China
基金
中国国家自然科学基金;
关键词
Lignocellulosic biomass; Corn stover; All-biomass films; DBU/CO2/DMSO; IONIC LIQUID SOLUTION; CELLULOSE; WOOD; TRANSESTERIFICATION; DELIGNIFICATION; FRACTIONATION; PRETREATMENT; CHLORIDE; BAGASSE; FIBER;
D O I
10.1016/j.ijbiomac.2025.140798
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The dissolution and homogeneous processing of lignocellulosic biomass presents a significant challenge for advanced biorefineries. In this work, we firstly investigated the dissolution behavior of corn stover-based lignocellulose in 1,8-diazabicyclo [5.4.0] undec-7-ene (DBU)/CO2/DMSO solvent system. The dissolution proportion reached 74.3 % via a two-step procedure, which involved pretreating of corn stover in DBU/DMSO solvent at 140 degrees C for 4 h, followed by dissolution at 50 degrees C for 6 h under 5 MPa CO2. Furthermore, the solubility of the corn stover can be improved by ball-milling treatment. Rheological behavior revealed that the solution viscosity and the intermolecular interactions decreased following ball-milling treatment. Subsequently, a small amount of wood pulp cellulose was incorporated to produce mechanically robust, fully UV-shielding, and allbiomass composite films. The tensile strength of the composite film containing 50 wt% wood pulp cellulose reached 47 MPa. This study provides significant insights into the development of green dissolution systems for lignocellulose and the development of lignocellulose-based advanced materials.
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页数:7
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