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Pré-Publication, Document De Travail Année : 2023

Biomass species and process contribution in a lignin first and ecofriendly approach for nanoparticles production

Résumé

In order to handle with urgent energy and environmental issues, the development of circular economy supported by lignocellulosic biorefineries is essential right now. In this respect, lignin should no longer be seen as a waste or by-product, but as a renewable and abundant resource. This is why research has recently focused on the development of lignin nanoparticles (LNPs), which are opening up new value-added areas. However, to date, no study has focused on the contribution of the initial raw biomass species (hardwood, softwood, herbaceous) on same environmentally-friendly LNPs production process. This lignin-first integration work therefore provides information on chemical lignin structure and functional goups interaction for LNPs formation. To this end, a steam explosion (SE) pretreatment was carried out upstream of an ethanol-Organosolv treatment (OT) in order to extract pure lignin which is then reduced to nano size by anti-solvent precipitation. We show that initial raw biomass species such as lignin type (OL lignin compare to KL Kraft lignin) makes a significant difference to particle size (50-250 nm), aggregation and morphology in aqueous suspensions. The LNPs formed by this eco-friendly, simple, fast and high yields process (7-15 wt % LNPs of initial biomass waste), which can be upscaled for industrial purposes, are stable over 90 days-storage and have lower sizes than Kraft lignin. LNPs resulting from this work therefore have great potential for high added-value applications such as cosmetics and medicine.
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Dates et versions

hal-04232814 , version 1 (09-10-2023)

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  • HAL Id : hal-04232814 , version 1

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Victor Girard, Hubert Chapuis, Nicolas Brosse, Nadia Canilho, Laurent Marchal-Heussler, et al.. Biomass species and process contribution in a lignin first and ecofriendly approach for nanoparticles production. 2023. ⟨hal-04232814⟩
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