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2025 (English)In: ChemSusChem, ISSN 1864-5631, E-ISSN 1864-564X, Vol. 18, no 7, article id e202402051Article in journal (Refereed) Published
Abstract [en]
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.
Place, publisher, year, edition, pages
Wiley, 2025
Keywords
Acetosolv, Allylation, Lignin, Thermoset, Wheat straw
National Category
Organic Chemistry Polymer Technologies Polymer Chemistry
Identifiers
urn:nbn:se:kth:diva-362246 (URN)10.1002/cssc.202402051 (DOI)001378626900001 ()39555986 (PubMedID)2-s2.0-105001636308 (Scopus ID)
Note
QC 20250416
2025-04-092025-04-092025-04-16Bibliographically approved