Oxyalkylation of Lignoboost™ Kraft Lignin with Propylene Carbonate: Design of Experiments towards Synthesis Optimization

Oxyalkylation with propylene carbonate (PC) is a safe process to convert lignin into a reactive liquid polyol to be used in polyurethane formulations. In this study, the effect of operating conditions of oxyalkylation (temperature, time and quantify of PC) on the quality of lignin-based polyol in te...

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Autores principales: Vieira, Fernanda Rosa, Barros-Timmons, Ana, Evtuguin, Dmitry Victorovitch, Pinto, Paula C. O. R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8912111/
https://www.ncbi.nlm.nih.gov/pubmed/35269155
http://dx.doi.org/10.3390/ma15051925
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author Vieira, Fernanda Rosa
Barros-Timmons, Ana
Evtuguin, Dmitry Victorovitch
Pinto, Paula C. O. R.
author_facet Vieira, Fernanda Rosa
Barros-Timmons, Ana
Evtuguin, Dmitry Victorovitch
Pinto, Paula C. O. R.
author_sort Vieira, Fernanda Rosa
collection PubMed
description Oxyalkylation with propylene carbonate (PC) is a safe process to convert lignin into a reactive liquid polyol to be used in polyurethane formulations. In this study, the effect of operating conditions of oxyalkylation (temperature, time and quantify of PC) on the quality of lignin-based polyol in terms hydroxyl number (I(OH)) and viscosity was studied. Full factorial modeling and response surface methodology (RSM) were applied to study the effect and interaction of process variables on the I(OH) and viscosity of lignin-based polyols. The results revealed that the I(OH) is highly affected by the reaction time, while the viscosity is affected by the amount of PC. Validation experiments confirmed the model is reliable. Furthermore, RSM optimization allowed to reduce the amount of PC by about 50% and to increase the lignin content in the polyol from 12.5% to 25% (w/w) depending on the temperature and time of the process and also on the purpose of the polyol produced (i.e., application in rigid foams or adhesives).
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spelling pubmed-89121112022-03-11 Oxyalkylation of Lignoboost™ Kraft Lignin with Propylene Carbonate: Design of Experiments towards Synthesis Optimization Vieira, Fernanda Rosa Barros-Timmons, Ana Evtuguin, Dmitry Victorovitch Pinto, Paula C. O. R. Materials (Basel) Article Oxyalkylation with propylene carbonate (PC) is a safe process to convert lignin into a reactive liquid polyol to be used in polyurethane formulations. In this study, the effect of operating conditions of oxyalkylation (temperature, time and quantify of PC) on the quality of lignin-based polyol in terms hydroxyl number (I(OH)) and viscosity was studied. Full factorial modeling and response surface methodology (RSM) were applied to study the effect and interaction of process variables on the I(OH) and viscosity of lignin-based polyols. The results revealed that the I(OH) is highly affected by the reaction time, while the viscosity is affected by the amount of PC. Validation experiments confirmed the model is reliable. Furthermore, RSM optimization allowed to reduce the amount of PC by about 50% and to increase the lignin content in the polyol from 12.5% to 25% (w/w) depending on the temperature and time of the process and also on the purpose of the polyol produced (i.e., application in rigid foams or adhesives). MDPI 2022-03-04 /pmc/articles/PMC8912111/ /pubmed/35269155 http://dx.doi.org/10.3390/ma15051925 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Vieira, Fernanda Rosa
Barros-Timmons, Ana
Evtuguin, Dmitry Victorovitch
Pinto, Paula C. O. R.
Oxyalkylation of Lignoboost™ Kraft Lignin with Propylene Carbonate: Design of Experiments towards Synthesis Optimization
title Oxyalkylation of Lignoboost™ Kraft Lignin with Propylene Carbonate: Design of Experiments towards Synthesis Optimization
title_full Oxyalkylation of Lignoboost™ Kraft Lignin with Propylene Carbonate: Design of Experiments towards Synthesis Optimization
title_fullStr Oxyalkylation of Lignoboost™ Kraft Lignin with Propylene Carbonate: Design of Experiments towards Synthesis Optimization
title_full_unstemmed Oxyalkylation of Lignoboost™ Kraft Lignin with Propylene Carbonate: Design of Experiments towards Synthesis Optimization
title_short Oxyalkylation of Lignoboost™ Kraft Lignin with Propylene Carbonate: Design of Experiments towards Synthesis Optimization
title_sort oxyalkylation of lignoboost™ kraft lignin with propylene carbonate: design of experiments towards synthesis optimization
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8912111/
https://www.ncbi.nlm.nih.gov/pubmed/35269155
http://dx.doi.org/10.3390/ma15051925
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