Zhao Jinwei, Han Jinzhi, Chen Zhaoxia, Wang Xin, Ye Xuan, Li Haoyang, Yao Shuangquan, Wang Shuangfei, Qin Chengrong, Liang Chen
Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, School of Light Industrial and Food Engineering, Guangxi University, Nanning 530004, PR China.
Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, School of Light Industrial and Food Engineering, Guangxi University, Nanning 530004, PR China.
Int J Biol Macromol. 2022 Dec 31;223(Pt A):273-280. doi: 10.1016/j.ijbiomac.2022.10.253. Epub 2022 Nov 5.
Lignin-carbohydrate complexes (LCCs) are important from the perspective of the anti-depolymerization barrier of lignocellulosic biomass, as it limits the high-value utilization of lignocellulosic biomass resources. In this study, the unit structure of lignin in the LCC has been investigated in depth. Oxidation of a selective lignin unit by chlorine dioxide revealed that the LCC structures are enriched with xylanase-macroporous resins, and the structure that was not oxidized in LCC was also identified. At a chlorine dioxide concentration of 90.93 mg/L, 1 g of LCC lignin is oxidized by 0.7 g chlorine dioxide. The purified residual hemicellulose lignin was mainly H-type. The β-O-4' signal was the strongest for the bond between lignin and carbohydrates. Therefore, it is speculated that most of the residual lignin in bamboo-alkali hemicellulose exists in the form of non-phenolic structural units. This study provides a reference for further studies on the specific structures of LCC.
木质素-碳水化合物复合体（LCCs）从木质纤维素生物质的抗解聚屏障角度来看很重要，因为它限制了木质纤维素生物质资源的高值利用。在本研究中，对LCC中木质素的单元结构进行了深入研究。用二氧化氯氧化选择性木质素单元表明，LCC结构富含木聚糖酶-大孔树脂，并且还鉴定出了LCC中未被氧化的结构。在二氧化氯浓度为90.93mg/L时，1g LCC木质素被0.7g二氧化氯氧化。纯化后的残留半纤维素木质素主要为H型。木质素与碳水化合物之间的键中，β-O-4'信号最强。因此，推测竹碱半纤维素中大部分残留木质素以非酚类结构单元的形式存在。本研究为进一步研究LCC的具体结构提供了参考。
