A robust monosaccharide-promoted lignocellulosic film for fresh meat and fruit preservation with enhanced UV-blocking and moisture resistance.

As an emerging fiber material with promising application potential, lignocellulosic nanofibrils (LCNFs) have been widely explored for sustainable packaging with ultraviolet (UV)-blocking capability. However, strong intermolecular hydrogen bonding and structural heterogeneity often lead to aggregation of LCNFs, limiting their dispersion. Inspired by the sugaring-out strategy, this study fabricated a monosaccharide-promoted LCNF (MPL) film by incorporating monosaccharide to facilitate LCNF defibrillation and uniform dispersion, yielding finer nanofibrils with an average diameter of 12 ± 4 nm. The resulting films exhibited superior packaging performance, including high tensile strength (174.5 ± 1.2 MPa), excellent ultraviolet B (UVB) and ultraviolet A (UVA) blocking efficiencies of 99.9 ± 0.5% and 97.1 ± 0.7%, and low water vapor permeability (5.75 ± 0.02 × 10-11 g/m·s·Pa). Preservation tests on food further confirmed the effectiveness of the film in maintaining food quality. This work presents a high-performance strategy for developing biomass-based packaging materials.