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Carbohydrate elimination of alkaline-extracted lignin liquor by steam explosion and its methylolation for substitution of phenolic adhesive
Alternative TitleInd. Crop. Prod.
Wang, Guanhua1,2; Chen, Hongzhang1
2014-02-01
Source PublicationINDUSTRIAL CROPS AND PRODUCTS
ISSN0926-6690
Volume53Issue:1Pages:93-101
AbstractSteam explosion pretreatment was proposed to eliminate carbohydrates in the alkali lignin liquor isolated from corn stalk and the obtained lignin liquor was concentrated and methylolated without further purification process for substitution of phenolic resin as plywood adhesive. Moreover, FTIR and GPC analysis technology was applied to characterize the lignin variation during the steam explosion treatment and the methylolation modification. The results demonstrated that steam explosion could effectively decrease the carbohydrate content of lignin liquor and the operational parameters of steam pressure 1.8 MPa and pressure maintaining time 5 min were obtained as preferable conditions for less carbohydrate content and higher lignin yield. The lignin methylolated under optimized conditions was found to successfully substitute 50% of phenolic resin as wood adhesive with approved bonding strength and lower free formaldehyde and phenol contents. The FOR and GPC analysis suggested that lignin showed higher content of carbonyl group and narrower molecular weight distribution due to depolymerization effect during steam explosion and formaldehyde was mainly incorporated into the aromatic C-5 position of G unit in the methylolation process. Overall, the study indicates that steam explosion is an effective treatment to improve the purity of lignin liquor and the direct substitution of phenolic adhesive by methylolated lignin liquor significantly reduces the costs for lignin recovery, which offers a promising approach for enhancing the commercial operation of a steam-explosion-derived biorefinery. (C) 2013 Elsevier B.V. All rights reserved.; Steam explosion pretreatment was proposed to eliminate carbohydrates in the alkali lignin liquor isolated from corn stalk and the obtained lignin liquor was concentrated and methylolated without further purification process for substitution of phenolic resin as plywood adhesive. Moreover, FTIR and GPC analysis technology was applied to characterize the lignin variation during the steam explosion treatment and the methylolation modification. The results demonstrated that steam explosion could effectively decrease the carbohydrate content of lignin liquor and the operational parameters of steam pressure 1.8 MPa and pressure maintaining time 5 min were obtained as preferable conditions for less carbohydrate content and higher lignin yield. The lignin methylolated under optimized conditions was found to successfully substitute 50% of phenolic resin as wood adhesive with approved bonding strength and lower free formaldehyde and phenol contents. The FOR and GPC analysis suggested that lignin showed higher content of carbonyl group and narrower molecular weight distribution due to depolymerization effect during steam explosion and formaldehyde was mainly incorporated into the aromatic C-5 position of G unit in the methylolation process. Overall, the study indicates that steam explosion is an effective treatment to improve the purity of lignin liquor and the direct substitution of phenolic adhesive by methylolated lignin liquor significantly reduces the costs for lignin recovery, which offers a promising approach for enhancing the commercial operation of a steam-explosion-derived biorefinery. (C) 2013 Elsevier B.V. All rights reserved.
KeywordSteam-explosion-derived Biorefineries Corn Stalk Carbohydrate Elimination Lignin Methylolation Phenolic Adhesives
SubtypeArticle
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.indcrop.2013.12.020
URL查看原文
Indexed BySCI
Language英语
WOS KeywordAMMONIUM LIGNOSULFONATE ; INFRARED-SPECTROSCOPY ; RESINS ; FRACTIONATION ; BIOMASS ; WOOD
WOS Research AreaAgriculture
WOS SubjectAgricultural Engineering ; Agronomy
WOS IDWOS:000338612500014
Citation statistics
Cited Times:35[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/10972
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Being 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Wang, Guanhua,Chen, Hongzhang. Carbohydrate elimination of alkaline-extracted lignin liquor by steam explosion and its methylolation for substitution of phenolic adhesive[J]. INDUSTRIAL CROPS AND PRODUCTS,2014,53(1):93-101.
APA Wang, Guanhua,&Chen, Hongzhang.(2014).Carbohydrate elimination of alkaline-extracted lignin liquor by steam explosion and its methylolation for substitution of phenolic adhesive.INDUSTRIAL CROPS AND PRODUCTS,53(1),93-101.
MLA Wang, Guanhua,et al."Carbohydrate elimination of alkaline-extracted lignin liquor by steam explosion and its methylolation for substitution of phenolic adhesive".INDUSTRIAL CROPS AND PRODUCTS 53.1(2014):93-101.
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