Téléchargement | - Voir le manuscrit accepté : Preparation of lignopolyols from wheat straw soda lignin (PDF, 2.8 Mio)
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DOI | Trouver le DOI : https://doi.org/10.1021/jf202452m |
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Auteur | Rechercher : Ahvazi, Behzad1; Rechercher : Wojciechowicz, Olivia1; Rechercher : Ton-That, Tan-Minh2; Rechercher : Hawari, Jalal1 |
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Affiliation | - Conseil national de recherches du Canada. Institut de recherche en biotechnologie du CNRC
- Conseil national de recherches du Canada. Institut des matériaux industriels du CNRC
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Format | Texte, Article |
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Sujet | wheat straw; soda lignin; oxyalkylation; propylene oxide; lignopolyl; characterization; 31P NMR spectroscopy; FTIR |
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Résumé | Wheat straw soda lignin was modified and characterized by several qualitative and quantitative methods such as <sup>31</sup>P NMR spectroscopy, to evaluate its potential as a substitute for polyols in view of polyurethane applications. Chemical modification of the lignin was achieved with propylene oxide to form ligno-polyol derivatives. This was performed by a two-step reaction of lignin with maleic anhydride followed by propylene oxide and by direct oxyalkylation under acidic and alkaline conditions. The physical and chemical properties of ligno-polyols from each method and the subsequent chain-extended hydroxyl groups were evaluated. Direct oxyalkylation of lignin under alkaline conditions was found to be more efficient than acidic conditions and more effective than the two-step process for preparing ligno-polyol with higher aliphatic hydroxyl contents. |
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Date de publication | 2011-08-19 |
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Dans | |
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Langue | anglais |
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Publications évaluées par des pairs | Oui |
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Numéro du CNRC | NRCC 53382 |
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Numéro NPARC | 18806226 |
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Exporter la notice | Exporter en format RIS |
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Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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Identificateur de l’enregistrement | c37fddd0-1ffe-4d62-a2b5-403f476507f4 |
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Enregistrement créé | 2012-03-06 |
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Enregistrement modifié | 2020-04-21 |
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