School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, China; School of Environmental Science & Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin 300457, China.
Bioresour Technol. 2020 May;303:122888. doi: 10.1016/j.biortech.2020.122888. Epub 2020 Jan 23.
A novel mind-set, termed lignin-first biorefinery, is bewitching to synchronously boost lignin output for entirely lignocellulosic utilization. A lignin-first fractionation, using a food-additive derived ionic liquid (1-ethyl-3-methylimidazolium acesulfamate, emimAce) and mild alkaline pretreatments, was formed for the purposely isolating poplar lignin, whilst delivering a cellulose-rich substrate that can be easily available for enzymatic digestion. The emimAce-driven lignin, alkali-soluble lignin and hemicellulose, and accessible cellulose were sequentially gained. We introduce a lignin-first approach to extract the amorphous fractions, destroy the robust architecture, and reform cellulose-I to II, thereby advancing the cellulose bioconversion from 15.4 to 90.5%. A harvest of 70.7% lignin, 52.1% hemicellulose, and 330.1 mg/g glucose was fulfilled from raw poplar. A structural ''beginning-to-end'' analysis of lignin inferred that emimAce ions are expected to interact with lignin β-aryl-ether due to their aromatic character. It was reasonable to derive benefits from lignin-first technique that can substantially augment the domain of biorefinering.
一种被称为木质素优先生物炼制的新理念，正在吸引人们同步提高木质素的产量，以实现全木质纤维素的利用。采用一种食品添加剂衍生的离子液体（1-乙基-3-甲基咪唑鎓乙磺酸盐，emimAce）和温和的碱性预处理进行木质素优先分级，旨在分离杨木木质素，同时提供富含纤维素的基质，便于进行酶解。可以依次获得 emimAce 驱动的木质素、碱溶性木质素和半纤维素以及可及纤维素。我们引入了一种木质素优先的方法来提取无定形部分，破坏其坚固的结构，并将纤维素-I 转化为 II，从而将纤维素的生物转化从 15.4%提高到 90.5%。从原始杨木中可收获 70.7%的木质素、52.1%的半纤维素和 330.1mg/g 的葡萄糖。对木质素进行结构“从头到尾”的分析表明，由于 emimAce 离子具有芳香性，预计它们会与木质素 β-芳基醚相互作用。木质素优先技术可以大幅增加生物炼制的领域，从中受益是合理的。
