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...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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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). |
format | Online Article Text |
id | pubmed-8912111 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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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