Lignin-xylan nanospheres prepared by green and quick method from lignocellulose and used as additive in PVA films.
Int J Biol Macromol
; 264(Pt 1): 129762, 2024 Apr.
Article
em En
| MEDLINE
| ID: mdl-38281535
ABSTRACT
Lignin, as an amorphous three-dimensional aromatic polymer, was able to self-assemble into lignin nanoparticles (LNPs) to realize valorization of lignin. Here, lignin-xylan extractives were extracted from grape seed (GS) and poplar by acidic THF at room temperature, and effectively produced lignin-xylan nanospheres via spin evaporation. The morphology and chemical properties of nanospheres were determined by its natural origins, consequently influencing its application. For the lignin-xylan extractive from grape seed, the lignin was composed of guaiacyl (G) and p-hydroxylphenyl (H) units and the hollowed nanospheres (GS-LNPs) with 362.72â¯nm diameter was produced. The extractive from poplar was composed of G-syringyl (S) typed lignin (80.30â¯%) and xylan (12.33â¯%), that can assemble into LNPs with smaller size (229.87â¯nm), better PDI (0.1), and light color. The hybrid particles showed the qualities of lignin and xylan, that properties led to the LNPs@PVA composite films with UV-blocking capability, strong mechanical strength and hydrophobicity, and transparency ability of visible light. P-LNPs showed better performance as the film additives, due to its lower particles size and high content of unconjugated -OH from xylan. Xylan was significant in the composite films, and lowering the xylan content resulted in the decrease of the composite film's mechanical properties and hydrophobicity.
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Base de dados:
MEDLINE
Assunto principal:
Nanosferas
/
Lignina
Idioma:
En
Revista:
Int J Biol Macromol
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
China