文献类型：期刊文献

英文题名：Facilitating enzymatic digestibility of larch by in-situ lignin modification during combined acid and alkali pretreatment

作者：Lai, Chenhuan[1] Jia, Yuan[1] Zhou, Chengfeng[2] Yang, Chundong[1] Shen, Buzhen[1] Zhang, Daihui[3] Yong, Qiang[1]

第一作者：Lai, Chenhuan

通信作者：Yong, Q[1];Zhang, DH[2]

机构：[1]Nanjing Forestry Univ, Coll Chem Engn, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat F, Nanjing 210037, Peoples R China;[2]Qingdao Univ, State Key Lab Biofibers & Ecotext, Qingdao 266000, Peoples R China;[3]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing 210042, Jiangsu, Peoples R China

年份：2020

卷号：311

外文期刊名：BIORESOURCE TECHNOLOGY

收录：;EI(收录号：20202008658676);Scopus(收录号：2-s2.0-85084486033);WOS:【SCI-EXPANDED(收录号:WOS:000539210000016)】；

基金：This study was supported by the National Natural Science Foundation (31971606), Natural Science Foundation of Jiangsu Province (BK20190091), and State Key Laboratory of Bio-Fibers and Eco-Textiles (Qingdao University) (No. K2019-15). The authors thank the Priority Academic Program Development of Jiangsu Higher Education Institution (PAPD) for supporting the work.

语种：英文

外文关键词：In-situ lignin modification; Combined pretreatment; Larch; Enzymatic hydrolysis

摘要：To overcome the recalcitrance of residual lignins in acid-pretreated larch (AL), a combined acid and alkali pretreatment with in-situ lignin modification was developed in this study. The results showed that introducing in-situ lignin modification with 2-naphthol to acid pretreatment (160 and 180 degrees C) improved the enzymatic digestibility of AL by 12.7-14.4%, through suppressing lignin repolymerization. The obviously higher improvement (57.8-88.3%) was achieved by applying alkali post-treatment (90 degrees C) with poly (ethylene glycol) diglycidyl ether (PEGDE) on AL, mainly due to the function of in-situ lignin modification with PEGDE for reducing enzyme non-productive binding on lignins. More importantly, the synergism of 2-naphthol and PEGDE modification facilitated the enzymatic hydrolysis of AL more significantly. Its beneficial mechanism was explored by investigating the effects of in-situ lignin modification on lignin properties, including extraction yields, functional groups, and enzyme affinity of lignins. Results will give insights into establishing an efficient pretreatment of softwood biomass.