Aldehyde-Assisted Lignocellulose Fractionation Provides Unique Lignin Oligomers for the Design of Tunable Polyurethane Bioresins
| Autor: | Raymond Buser, Walter Eevers, Jean Behaghel de Bueren, Jaime Gracia-Vitoria, Mohan Wadekar, Mikael Monga Mulunda, Florent Héroguel, Chloé Wegmann, Richard Vendamme, Jeremy S. Luterbacher, Karolien Vanbroekhoven, Pablo Ortiz, Florence Isnard |
|---|---|
| Předmět: |
Polymers and Plastics
Polyurethanes Lignocellulosic biomass Bioengineering 02 engineering and technology Fractionation coatings Chemical Fractionation 010402 general chemistry 01 natural sciences Aldehyde Lignin complex mixtures Biomaterials chemistry.chemical_compound nanocomposites Materials Chemistry polycyclic compounds Organic chemistry depolymerization Biology Polyurethane kraft lignin chemistry.chemical_classification Aldehydes solubility epoxy-resins 021001 nanoscience & nanotechnology 0104 chemical sciences Chemistry chemistry networks 0210 nano-technology performance |
| Zdroj: | Biomacromolecules |
| ISSN: | 1525-7797 |
| Popis: | Thanks to chemical stabilization, aldehyde-assisted fractionation (AAF) of lignocellulosic biomass has recently emerged as a powerful tool for the production of largely uncondensed lignin. Depolymerization of AAF lignin via ether deavage provides aromatic monomers at near theoretical yields based on ether cleavage and an oligomeric fraction that remains largely unexploited despite its unique material properties. Here, we present an in-depth analytical characterization of AAF oligomers derived from hardwood and softwood in order to elucidate their molecular structures. These bioaromatic oligomers surpass technical Kraft lignin in terms of purity, solubility, and functionality and thus cannot even be compared to this common feedstock directly for material production. Instead, we performed comparative experiments with Kraft oligomers of similar molecular weight (Mn similar to 1000) obtained through solvent extraction. These oligomers were then formulated into polyurethane materials. Substantial differences in material properties were observed depending on the amount of lignin, the botanical origin, and the biorefining process (AAF vs Kraft), suggesting new design principles for lignin-derived biopolymers with tailored properties. These results highlight the surprising versatility of AAF oligomers towards the design of new biomaterials and further demonstrate that AAF can enable the conversion of all biomass fractions into value-added products. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|