Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Jiangsu Province Key Laboratory of Biomass Energy and Materials, Nanjing 210042, China; Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China; Department of Chemical and Biomolecular Engineering, University of Tennessee Knoxville, Knoxville, TN 37996, USA.
Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Jiangsu Province Key Laboratory of Biomass Energy and Materials, Nanjing 210042, China.
Bioresour Technol. 2021 Apr;326:124696. doi: 10.1016/j.biortech.2021.124696. Epub 2021 Jan 12.
Herein, we established a novel deep eutectic solvent (DES) using lignin-derived guaiacol as hydrogen bond donor (HBD). The sole ChCl/guaiacol system was found to be inefficient for the fractionation of wheat straw (WS), while the incorporation of trace AlCl significantly facilitated the degradation of hemicellulose and lignin, resulting in a complete enzymatic digestibility of the pretreated WS. Further, this study revealed that the DES-degraded lignin was readily precipitated during the washing process, and thus hindered the enzymatic hydrolysis of poplar and bamboo (with hydrolysis yield of 42.03% and 71.67%, respectively). Alkali washing offers a possible approach to remove the precipitated lignin, after which a near 100% hydrolysis yield was also obtained for poplar and bamboo.
在此，我们使用木质素衍生的愈创木酚作为氢键供体（HBD），建立了一种新型的深共晶溶剂（DES）。研究发现，单一的氯化胆碱/愈创木酚体系对于小麦秸秆（WS）的分级分离效果不佳，而微量的三氯化铝的加入显著促进了半纤维素和木质素的降解，使预处理后的 WS 完全具有酶可消化性。此外，本研究表明，在洗涤过程中，DES 降解的木质素很容易沉淀，从而阻碍了杨木和竹子的酶水解（水解率分别为 42.03%和 71.67%）。碱洗提供了一种去除沉淀木质素的可能方法，之后杨木和竹子的水解率也接近 100%。
