Shu Weiwei, Yang Lu, Lan Wu, Yu Manman, Yuan Liang, Liu Chuanfu, Li Zengyong
Anhui Provincial Engineering Center for High Performance Biobased Nylons, School of Materials and Chemistry, Anhui Agricultural University, Hefei 230036, China.
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
Int J Biol Macromol. 2025 Feb;289:138919. doi: 10.1016/j.ijbiomac.2024.138919. Epub 2024 Dec 17.
Developing a mild and efficient pretreatment technique to fully utilize lignocellulosic biomass remains a challenge. In this work, a biphasic system with 2-phenoxyethanol (EPH) organic solvent and phosphotungstic acid (PTA) aqueous solution was employed to pretreat corn stover. The prominent synergistic effect between EPH and PTA was revealed to play a key role in the fractionation of corn stover. The excellent separation efficiency with 88.55 % cellulose retention, 85.02 % xylan removal, and 86.68 % lignin removal was achieved under mild pretreatment conditions. The 62.18 % of xylose in aqueous phase, and 83.44 % of lignin from organic phase were recovered after the EPH/PTA biphasic pretreatment. Furthermore, the solid residue was digested with high enzymatic glucose yield of 92.69 %, and the xylose was oxidated with xylonic acid yield of 50.06 %. Meanwhile, the high-performance lignin-based films were manufactured by using the recovered lignin. This study presented a promising way for high-value utilization of lignocellulosic biomass.
开发一种温和且高效的预处理技术以充分利用木质纤维素生物质仍然是一项挑战。在这项工作中，采用了一种由2-苯氧基乙醇（EPH）有机溶剂和磷钨酸（PTA）水溶液组成的双相体系对玉米秸秆进行预处理。结果表明，EPH和PTA之间显著的协同效应在玉米秸秆的分级分离中起关键作用。在温和的预处理条件下，实现了优异的分离效率，纤维素保留率为88.55%，木聚糖去除率为85.02%，木质素去除率为86.68%。经过EPH/PTA双相预处理后，水相中回收了62.18%的木糖，有机相中回收了83.44%的木质素。此外，对固体残渣进行酶解，葡萄糖产率高达92.69%，木糖氧化生成木糖酸的产率为50.06%。同时，利用回收的木质素制备了高性能的木质素基薄膜。这项研究为木质纤维素生物质的高值化利用提供了一条有前景的途径。
