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Evaluation of Organosolv Lignin as an Oxidation Inhibitor in Bitumen

Organosolv lignin, a natural polymer, has been used in this study as an oxidation inhibitor in bitumen. Particularly, the effect of oxidative aging on the chemical compositional changes and on the rheology of bituminous binders with organosolv lignin and the impact to inhibit oxidation in bitumen we...

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Autores principales: Zhang, Yi, Liu, Xueyan, Apostolidis, Panos, Jing, Ruxin, Erkens, Sandra, Poeran, Natascha, Skarpas, Athanasios
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7287635/
https://www.ncbi.nlm.nih.gov/pubmed/32466172
http://dx.doi.org/10.3390/molecules25102455
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author Zhang, Yi
Liu, Xueyan
Apostolidis, Panos
Jing, Ruxin
Erkens, Sandra
Poeran, Natascha
Skarpas, Athanasios
author_facet Zhang, Yi
Liu, Xueyan
Apostolidis, Panos
Jing, Ruxin
Erkens, Sandra
Poeran, Natascha
Skarpas, Athanasios
author_sort Zhang, Yi
collection PubMed
description Organosolv lignin, a natural polymer, has been used in this study as an oxidation inhibitor in bitumen. Particularly, the effect of oxidative aging on the chemical compositional changes and on the rheology of bituminous binders with organosolv lignin and the impact to inhibit oxidation in bitumen were evaluated. Firstly, after analyzing the microstructure and surface characteristics of utilized organosolv lignin, a high shear mixing procedure was followed to produce binders of different proportions of lignin in bitumen. Pressure aging vessel conditioning was applied to these binders to simulate in-field aging and a series of tests were performed. Fourier transform infrared spectroscopy was used to track the compositional changes of lignin–bitumen systems before and after aging respectively. The rheological changes due to oxidative aging in the different lignin–bitumen systems were studied by means of dynamic shear rheometer tests. Based on the spectroscopic laboratory analyses, certain proportions of organosolv lignin in bitumen have shown a potential oxidation retardation effect in bitumen since a reduction of carbonyl and sulfoxide compounds was observed. However, the addition of lignin reduced the fatigue life of bitumen and potentially led to an increase in brittle fracture sensitivity at low and medium temperatures. Nevertheless, lignin improved the rutting resistance at high temperatures. Overall, it can be concluded that organosolv lignin can suppress the oxidation of sulfur and carbon compounds in bitumen either by direct deceleration of oxidation reaction or interaction with compounds that otherwise are oxidizable, without seriously degrading the mechanical properties.
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spelling pubmed-72876352020-06-15 Evaluation of Organosolv Lignin as an Oxidation Inhibitor in Bitumen Zhang, Yi Liu, Xueyan Apostolidis, Panos Jing, Ruxin Erkens, Sandra Poeran, Natascha Skarpas, Athanasios Molecules Article Organosolv lignin, a natural polymer, has been used in this study as an oxidation inhibitor in bitumen. Particularly, the effect of oxidative aging on the chemical compositional changes and on the rheology of bituminous binders with organosolv lignin and the impact to inhibit oxidation in bitumen were evaluated. Firstly, after analyzing the microstructure and surface characteristics of utilized organosolv lignin, a high shear mixing procedure was followed to produce binders of different proportions of lignin in bitumen. Pressure aging vessel conditioning was applied to these binders to simulate in-field aging and a series of tests were performed. Fourier transform infrared spectroscopy was used to track the compositional changes of lignin–bitumen systems before and after aging respectively. The rheological changes due to oxidative aging in the different lignin–bitumen systems were studied by means of dynamic shear rheometer tests. Based on the spectroscopic laboratory analyses, certain proportions of organosolv lignin in bitumen have shown a potential oxidation retardation effect in bitumen since a reduction of carbonyl and sulfoxide compounds was observed. However, the addition of lignin reduced the fatigue life of bitumen and potentially led to an increase in brittle fracture sensitivity at low and medium temperatures. Nevertheless, lignin improved the rutting resistance at high temperatures. Overall, it can be concluded that organosolv lignin can suppress the oxidation of sulfur and carbon compounds in bitumen either by direct deceleration of oxidation reaction or interaction with compounds that otherwise are oxidizable, without seriously degrading the mechanical properties. MDPI 2020-05-25 /pmc/articles/PMC7287635/ /pubmed/32466172 http://dx.doi.org/10.3390/molecules25102455 Text en © 2020 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
Zhang, Yi
Liu, Xueyan
Apostolidis, Panos
Jing, Ruxin
Erkens, Sandra
Poeran, Natascha
Skarpas, Athanasios
Evaluation of Organosolv Lignin as an Oxidation Inhibitor in Bitumen
title Evaluation of Organosolv Lignin as an Oxidation Inhibitor in Bitumen
title_full Evaluation of Organosolv Lignin as an Oxidation Inhibitor in Bitumen
title_fullStr Evaluation of Organosolv Lignin as an Oxidation Inhibitor in Bitumen
title_full_unstemmed Evaluation of Organosolv Lignin as an Oxidation Inhibitor in Bitumen
title_short Evaluation of Organosolv Lignin as an Oxidation Inhibitor in Bitumen
title_sort evaluation of organosolv lignin as an oxidation inhibitor in bitumen
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7287635/
https://www.ncbi.nlm.nih.gov/pubmed/32466172
http://dx.doi.org/10.3390/molecules25102455
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