Cargando…

Preparation of Lignosulfonates from Biorefinery Lignins by Sulfomethylation and Their Application as a Water Reducer for Concrete

Lignosulfonate (LG), a water-soluble polymer from sulfite pulping process of lignocellulosic biomass, has been commercially applied as admixture for concrete. In this work, lignosulfonates were produced from alkaline lignin (AL) and enzymatic hydrolysis residue (EHR) by sulfomethylation and these li...

Descripción completa

Detalles Bibliográficos
Autores principales: Huang, Caoxing, Ma, Junmei, Zhang, Weiyu, Huang, Guohong, Yong, Qiang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6403876/
https://www.ncbi.nlm.nih.gov/pubmed/30960766
http://dx.doi.org/10.3390/polym10080841
_version_ 1783400728768806912
author Huang, Caoxing
Ma, Junmei
Zhang, Weiyu
Huang, Guohong
Yong, Qiang
author_facet Huang, Caoxing
Ma, Junmei
Zhang, Weiyu
Huang, Guohong
Yong, Qiang
author_sort Huang, Caoxing
collection PubMed
description Lignosulfonate (LG), a water-soluble polymer from sulfite pulping process of lignocellulosic biomass, has been commercially applied as admixture for concrete. In this work, lignosulfonates were produced from alkaline lignin (AL) and enzymatic hydrolysis residue (EHR) by sulfomethylation and these lignosulfonates as water reducers for concrete were then evaluated. Results showed that 94.9% and 68.9% of lignins in AL and EHR could be sulfonated under optimum sulfomethylation conditions, respectively. The sulfonic groups in lignosulfonates from AL (AL-LG) and EHR (EHR-LG) were 1.6 mmol/g and 1.0 mmol/g, respectively. Surface tension and zeta potential analysis indicated that both AL-LG and EHR-LG can be potentially used to as dispersant for improving the fluidity of the cement paste, similarly to commercial lignosulfonate (CM-LG). Adding 0.2 wt % of AL-LG, EHR-LG, and CM-LG in the concrete, the compressive strength (28 days) of concretes increased from 38.4 Mpa to 41.6, 42.6, and 40.9 Mpa, respectively. These findings suggest that the lignosulfonate from biorefinery lignin by sulfomethylation can meet the industrial standards as water reducers for cement admixtures.
format Online
Article
Text
id pubmed-6403876
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-64038762019-04-02 Preparation of Lignosulfonates from Biorefinery Lignins by Sulfomethylation and Their Application as a Water Reducer for Concrete Huang, Caoxing Ma, Junmei Zhang, Weiyu Huang, Guohong Yong, Qiang Polymers (Basel) Article Lignosulfonate (LG), a water-soluble polymer from sulfite pulping process of lignocellulosic biomass, has been commercially applied as admixture for concrete. In this work, lignosulfonates were produced from alkaline lignin (AL) and enzymatic hydrolysis residue (EHR) by sulfomethylation and these lignosulfonates as water reducers for concrete were then evaluated. Results showed that 94.9% and 68.9% of lignins in AL and EHR could be sulfonated under optimum sulfomethylation conditions, respectively. The sulfonic groups in lignosulfonates from AL (AL-LG) and EHR (EHR-LG) were 1.6 mmol/g and 1.0 mmol/g, respectively. Surface tension and zeta potential analysis indicated that both AL-LG and EHR-LG can be potentially used to as dispersant for improving the fluidity of the cement paste, similarly to commercial lignosulfonate (CM-LG). Adding 0.2 wt % of AL-LG, EHR-LG, and CM-LG in the concrete, the compressive strength (28 days) of concretes increased from 38.4 Mpa to 41.6, 42.6, and 40.9 Mpa, respectively. These findings suggest that the lignosulfonate from biorefinery lignin by sulfomethylation can meet the industrial standards as water reducers for cement admixtures. MDPI 2018-07-30 /pmc/articles/PMC6403876/ /pubmed/30960766 http://dx.doi.org/10.3390/polym10080841 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Huang, Caoxing
Ma, Junmei
Zhang, Weiyu
Huang, Guohong
Yong, Qiang
Preparation of Lignosulfonates from Biorefinery Lignins by Sulfomethylation and Their Application as a Water Reducer for Concrete
title Preparation of Lignosulfonates from Biorefinery Lignins by Sulfomethylation and Their Application as a Water Reducer for Concrete
title_full Preparation of Lignosulfonates from Biorefinery Lignins by Sulfomethylation and Their Application as a Water Reducer for Concrete
title_fullStr Preparation of Lignosulfonates from Biorefinery Lignins by Sulfomethylation and Their Application as a Water Reducer for Concrete
title_full_unstemmed Preparation of Lignosulfonates from Biorefinery Lignins by Sulfomethylation and Their Application as a Water Reducer for Concrete
title_short Preparation of Lignosulfonates from Biorefinery Lignins by Sulfomethylation and Their Application as a Water Reducer for Concrete
title_sort preparation of lignosulfonates from biorefinery lignins by sulfomethylation and their application as a water reducer for concrete
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6403876/
https://www.ncbi.nlm.nih.gov/pubmed/30960766
http://dx.doi.org/10.3390/polym10080841
work_keys_str_mv AT huangcaoxing preparationoflignosulfonatesfrombiorefineryligninsbysulfomethylationandtheirapplicationasawaterreducerforconcrete
AT majunmei preparationoflignosulfonatesfrombiorefineryligninsbysulfomethylationandtheirapplicationasawaterreducerforconcrete
AT zhangweiyu preparationoflignosulfonatesfrombiorefineryligninsbysulfomethylationandtheirapplicationasawaterreducerforconcrete
AT huangguohong preparationoflignosulfonatesfrombiorefineryligninsbysulfomethylationandtheirapplicationasawaterreducerforconcrete
AT yongqiang preparationoflignosulfonatesfrombiorefineryligninsbysulfomethylationandtheirapplicationasawaterreducerforconcrete