Journal
JOURNAL OF CLEANER PRODUCTION
Volume 430, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2023.139694
Keywords
Lignin; Ultraviolet shielding; Self-cleaning; Photothermal conversion
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This study developed lignin nanoparticles with amino functional groups, which were prepared using modified deep eutectic solvents and applied to wood composites for UV shielding. The lignin nanoparticles exhibited UV shielding, photothermal conversion, and photothermal de-icing properties, providing a benchmark for the low-cost and sustainable preparation of UV shielding wood composites using lignin nanoparticles.
Ultraviolet radiation (UV) has a significant effect on the wood, and the commonly used UV shielding agents are easily degraded. Lignin is a bio-based UV screening agent and tuning of its nanoparticles is meaningful for realizing the UV shielding properties and stability of composites. With the modification of the deep eutectic solvents based on sulfamic acid and urea, lignin nanoparticles with amino functional groups were prepared, and a protective layer with UV shielding properties was constructed on the surface of the poplar veneer. The phenolic hydroxyl groups, carbonyl groups, and conjugated structure of lignin nanoparticles endowed the composites with the properties of UV shielding, photothermal conversion, and photothermal de-icing. The results of this study provide a benchmark for realizing the low-cost and sustainable preparation of wood composites with UV shielding and are conducive to promoting the high-value application of lignin nanoparticles.
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