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Production and Properties of Lignin Nanoparticles from Ethanol Organosolv Liquors—Influence of Origin and Pretreatment Conditions

Despite major efforts in recent years, lignin as an abundant biopolymer is still underutilized in material applications. The production of lignin nanoparticles with improved properties through a high specific surface area enables easier applicability and higher value applications. Current precipitat...

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Autores principales: Adamcyk, Johannes, Beisl, Stefan, Amini, Samaneh, Jung, Thomas, Zikeli, Florian, Labidi, Jalel, Friedl, Anton
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7866125/
https://www.ncbi.nlm.nih.gov/pubmed/33530559
http://dx.doi.org/10.3390/polym13030384
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author Adamcyk, Johannes
Beisl, Stefan
Amini, Samaneh
Jung, Thomas
Zikeli, Florian
Labidi, Jalel
Friedl, Anton
author_facet Adamcyk, Johannes
Beisl, Stefan
Amini, Samaneh
Jung, Thomas
Zikeli, Florian
Labidi, Jalel
Friedl, Anton
author_sort Adamcyk, Johannes
collection PubMed
description Despite major efforts in recent years, lignin as an abundant biopolymer is still underutilized in material applications. The production of lignin nanoparticles with improved properties through a high specific surface area enables easier applicability and higher value applications. Current precipitation processes often show poor yields, as a portion of the lignin stays in solution. In the present work, lignin was extracted from wheat straw, spruce, and beech using ethanol organosolv pretreatment at temperatures from 160–220 °C. The resulting extracts were standardized to the lowest lignin content and precipitated by solvent-shifting to produce lignin micro- and nanoparticles with mean hydrodynamic diameters from 67.8 to 1156.4 nm. Extracts, particles and supernatant were analyzed on molecular weight, revealing that large lignin molecules are precipitated while small lignin molecules stay in solution. The particles were purified by dialysis and characterized on their color and antioxidant activity, reaching ASC equivalents between 19.1 and 50.4 mg/mg. This work gives detailed insight into the precipitation process with respect to different raw materials and pretreatment severities, enabling better understanding and optimization of lignin nanoparticle precipitation.
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spelling pubmed-78661252021-02-07 Production and Properties of Lignin Nanoparticles from Ethanol Organosolv Liquors—Influence of Origin and Pretreatment Conditions Adamcyk, Johannes Beisl, Stefan Amini, Samaneh Jung, Thomas Zikeli, Florian Labidi, Jalel Friedl, Anton Polymers (Basel) Article Despite major efforts in recent years, lignin as an abundant biopolymer is still underutilized in material applications. The production of lignin nanoparticles with improved properties through a high specific surface area enables easier applicability and higher value applications. Current precipitation processes often show poor yields, as a portion of the lignin stays in solution. In the present work, lignin was extracted from wheat straw, spruce, and beech using ethanol organosolv pretreatment at temperatures from 160–220 °C. The resulting extracts were standardized to the lowest lignin content and precipitated by solvent-shifting to produce lignin micro- and nanoparticles with mean hydrodynamic diameters from 67.8 to 1156.4 nm. Extracts, particles and supernatant were analyzed on molecular weight, revealing that large lignin molecules are precipitated while small lignin molecules stay in solution. The particles were purified by dialysis and characterized on their color and antioxidant activity, reaching ASC equivalents between 19.1 and 50.4 mg/mg. This work gives detailed insight into the precipitation process with respect to different raw materials and pretreatment severities, enabling better understanding and optimization of lignin nanoparticle precipitation. MDPI 2021-01-26 /pmc/articles/PMC7866125/ /pubmed/33530559 http://dx.doi.org/10.3390/polym13030384 Text en © 2021 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
Adamcyk, Johannes
Beisl, Stefan
Amini, Samaneh
Jung, Thomas
Zikeli, Florian
Labidi, Jalel
Friedl, Anton
Production and Properties of Lignin Nanoparticles from Ethanol Organosolv Liquors—Influence of Origin and Pretreatment Conditions
title Production and Properties of Lignin Nanoparticles from Ethanol Organosolv Liquors—Influence of Origin and Pretreatment Conditions
title_full Production and Properties of Lignin Nanoparticles from Ethanol Organosolv Liquors—Influence of Origin and Pretreatment Conditions
title_fullStr Production and Properties of Lignin Nanoparticles from Ethanol Organosolv Liquors—Influence of Origin and Pretreatment Conditions
title_full_unstemmed Production and Properties of Lignin Nanoparticles from Ethanol Organosolv Liquors—Influence of Origin and Pretreatment Conditions
title_short Production and Properties of Lignin Nanoparticles from Ethanol Organosolv Liquors—Influence of Origin and Pretreatment Conditions
title_sort production and properties of lignin nanoparticles from ethanol organosolv liquors—influence of origin and pretreatment conditions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7866125/
https://www.ncbi.nlm.nih.gov/pubmed/33530559
http://dx.doi.org/10.3390/polym13030384
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