title: Surface lignin change pertaining to the integrated process of dilute acid pre-extraction and mechanical refining of poplar wood chips and its impact on enzymatic hydrolysis.
abstract: Dilute acid pre-extraction enhanced the mechanically refined poplar pulp substrates' enzymatic hydrolysis efficiency obviously. The results showed that the surface lignin distribution was changed significantly in residual wood chips and pulp substrates, and the surface lignin distribution showed important impact on the following enzymatic hydrolysis. Acid pre-extraction can lead to a redistribution of lignin in fiber cell walls, i.e., the lignin was degraded and migrated to fiber surface in the form of re-deposited lignin and pseudo-lignin. However, higher pre-extraction intensity was not desired due to the formation of redeposited lignin and pseudo-lignin. This study will help to reach a deeper understanding on the lignin distribution in the view of molecular and ultrastructure, and promote the development of a cost-efficient pretreatment strategy for biomass processing.
authors.affiliation: Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China. Electronic address: wei.liu2009@hotmail.com.
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.affiliation: Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.affiliation: Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China.
authors.forename: Qingxi
authors.initials: Q
authors.lastname: Hou
authors.affiliation: Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China.
authors.forename: Jinping
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology, Tianjin 300457, China.
authors.forename: Bing
authors.initials: B
authors.lastname: Wang
mesh_terms: D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D002473:Cell Wall / Q000187:drug effects / Q000378:metabolism; D002480:Cellulase / Q000378:metabolism*; D002482:Cellulose / Q000378:metabolism; D005947:Glucose / Q000378:metabolism; D006868:Hydrolysis; D008031:Lignin / Q000737:chemistry*; D008345:Manganese / Q000032:analysis; D056951:Photoelectron Spectroscopy; D032107:Populus / Q000737:chemistry*; D013464:Sulfuric Acids / Q000494:pharmacology; D014934:Wood / Q000737:chemistry*
chemical_list: D013464:Sulfuric Acids; D008345:Manganese; D002482:Cellulose; D008031:Lignin; D002480:Cellulase; D005947:Glucose; C033158:sulfuric acid
keywords: Dilute acid pre-extraction; Enzymatic hydrolysis; Mechanical refining; Redistribution; Surface lignin concentration