Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
Bioresour Technol. 2022 Jun;354:127225. doi: 10.1016/j.biortech.2022.127225. Epub 2022 Apr 25.
Bamboo processing residue, which is rich in parenchyma cells, was treated as huge waste in bamboo processing industry, such as reassemble bamboo and bamboo flooring. Herein, autohydrolysis and rapid different deep eutectic solvents (DES) delignification strategy were consecutively performed to remove hemicelluloses and lignin from bamboo processing residue. The xylooligosaccharides (XOS) with high yield (34.35%) was achieved in the autohydrolysis process. Results showed that alkaline DES pretreatment resulted in the highest glucose yield (88.22%) and relatively high delignification rate (83.75%) as well as well-preserved lignin structures. However, the lignin fractions obtained under acidic DES conditions were tending to assemble into lignin nanoparticles (LNPs) and having excellent antioxidant activity as compared to those obtained from alkaline DES system. In brief, the combination of autohydrolysis and rapid DES delignification can achieve orientated fractionation of the components from the industrialized bamboo.
竹加工剩余物富含薄壁细胞，在竹加工行业中如重组竹和竹地板等被视为大量浪费。本文采用连续的自水解和快速不同深度共晶溶剂（DES）脱木质素策略，从竹加工剩余物中去除半纤维素和木质素。自水解过程可获得高产率（34.35%）的木二糖（XOS）。结果表明，碱性 DES 预处理可获得最高的葡萄糖产率（88.22%）和较高的脱木质素率（83.75%），以及保留较好的木质素结构。然而，在酸性 DES 条件下得到的木质素组分倾向于组装成木质素纳米颗粒（LNP），并且具有比碱性 DES 体系更好的抗氧化活性。总之，自水解和快速 DES 脱木质素的结合可以实现工业化竹材中组分的定向分离。
