Allylation and Thermosetting of Acetosolv Wheat Straw Lignin.

Autor: Truncali A; Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden.; Wallenberg Wood Science Center (WWSC), Sweden., Di Francesco D; Department of Chemistry, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden., Margarita C; Department of Chemistry, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden., Ribca I; Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden.; Wallenberg Wood Science Center (WWSC), Sweden., Brandt L; Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden.; Wallenberg Wood Science Center (WWSC), Sweden., Sochor B; Deutsches-Elektronen Synchrotron (DESY), Notkestraße 85, 22607, Hamburg, Germany.; Advanced Light Source, Lawrence Berkeley National Laboratory, CA, 94720, United States., Roth SV; Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden.; Deutsches-Elektronen Synchrotron (DESY), Notkestraße 85, 22607, Hamburg, Germany., Johansson M; Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden.; Wallenberg Wood Science Center (WWSC), Sweden., Lundberg H; Department of Chemistry, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden.
Jazyk: angličtina
Zdroj: ChemSusChem [ChemSusChem] 2024 Nov 18, pp. e202402051. Date of Electronic Publication: 2024 Nov 18.
DOI: 10.1002/cssc.202402051
Abstrakt: The acetosolv extraction, allylation and subsequent cross-linking of wheat straw lignin to thermoset biomaterials is herein described. The extraction temperature proved to be of great importance for the quality of the resulting lignin, with moderate temperature being key for preservation of β-O-4' linkages. The allylation of the acetosolv lignin was carried out using three different synthetic strategies, resulting in selective installation of either benzylic or phenolic allyl ethers, or unselective allylation of various hydroxyl groups via etherification and carboxyallylation. The different allylation protocols employed either allyl alcohol, allyl chloride, or diallylcarbonate as allyl precursors, with the latter resulting in the highest degree of functionalization. Selected allylated acetosolv lignins were cross-linked using a thiol-ene approach and the lignin with the highest density of allyl groups was found to form a cross-linked thermoset material with properties comparable to kraft lignin-based analogues.
(© 2024 The Author(s). ChemSusChem published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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