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Title: Preparation of Lignin Nanoparticles from Wood Waste for Wood Surface Treatment
Authors: Zikeli, Florian
Vinciguerra, Vittorio 
D'Annibale, Alessandro 
Capitani, Donatella
Romagnoli, Manuela 
Scarascia Mugnozza, Giuseppe 
Issue Date: 2019
Lignin was isolated from wood wastes comprising Iroko sawdust (IR) and mixed sawdust from Iroko and Norway spruce (IRNS), furnished by a local wood houses producer. The respective acidolysis lignin fractions were structurally characterized using pyrolysis (Py)-GCMS, two-dimensional heteronuclear single quantum correlation nuclear magnetic resonance (2D HSQC NMR), Fourier-transform infrared FTIR and ultraviolet-visible (UV-VIS) spectroscopies, size exclusion chromatography, and standard wet-chemistry methods for Klason lignin and polysaccharides determination. The isolated lignin fractions were subsequently used for the preparation of lignin nanoparticles (LNPs) using a non-solvent method. LNPs were then used for wood surface treatment using a dip-coating technique. The coated wood samples were analyzed by colorimetry and scanning electron microscopy (SEM) before and after artificial weathering experiments in a UV chamber to investigate the UV protection potential of the LNPs coatings. Wood samples dip-coated with LNPs showed promising surface modifications resembling a sort of film of fused LNPs. Coatings made from IR-LNPs and IRNS-LNPs performed significantly better in artificial weathering experiments than uncoated reference samples.
ISSN: 2079-4991
DOI: 10.3390/nano9020281
Rights: Attribution 4.0 International
Appears in Collections:A1. Articolo in rivista

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