Autor(es)

Las-Casas, Bruno ; Wu, Jie ; Rojas, Orlando J. ; Arantes, Valdeir

• Tipo de documento: Artigo Científico
• Fonte: International Journal of Biological Macromolecules; v. 323, p. 13-pg., 2025-09-01.

Resumo

Films of cellulose nanofibrils (CNF) incorporating lignin nanoparticles (LNPs) were synthesized and evaluated for their potential as active and multifunctional packaging materials. The barrier and functional properties of the films (UV-blocking, antimicrobial, and antioxidant activities) were investigated alongside comprehensive chemical, morphological, mechanical, thermal, optical, and surface characterizations. LNPs self-assembled on the film surface during filtration-based dewatering, influencing surface roughness and wettability. However, LNP incorporation had minimal impact on bulk properties, preserving the mechanical strength (105-126 MPa), thermal stability (313-325 degrees C), and oxygen barrier performance (2.7-4.4 cc(3).m(-2).day(-1).0.1 MPa-1) provided by CNF. UV-blocking capacity (> 87 %) and antioxidant activity (8.55-27.89 RSA%) increased with higher LNP loading, while microbial growth assays suggested some antimicrobial effects, particularly at low LNP concentrations. LNP migration remained within regulatory limits for packaging materials (< 60 mg/kg), varying with lignin concentration and food simulant type. In food packaging simulations, CNF/LNP films outperformed commercial plastics, significantly extending the shelf life of raspberries. Overall, the incorporation of LNPs imparted unique functional properties to CNF films without compromising their structural integrity, demonstrating their strong potential for active packaging applications. (AU)

• Processo FAPESP: 21/07023-2 - Desenvolvimento de uma plataforma tecnologia baseada em enzimas para produção e modulação de nanocelulose: validação para aplicações biomédicas e embalagens ativas
• Beneficiário: Valdeir Arantes
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores - Fase 2
• Processo FAPESP: 21/04324-1 - Aplicação de tratamentos enzimáticos e nanopartículas de lignina no desenvolvimento de nanocelulose customizada para fabricação de embalagem ativa e sustentável
• Beneficiário: Bruno Las Casas Chaves
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto