Broccoli leaf-derived carbon dots reinforced chitosan/gelatin film as UV-blocking, antioxidant, and antibacterial films for food packaging.

ABSTRACT: Carbon dots (CDs) were synthesized from broccoli leaf waste via a hydrothermal process at 180 °C for 8 h and characterized by UV-Vis, PL, FTIR, XRD, TEM, and zeta potential analyses. The CDs exhibited quasi-spherical morphology with diameters of 5-15 nm, a polycrystalline structure composed of amorphous and graphitic domains, and diverse surface functional groups (-OH, -COOH, -NH₂, C[double bond, length as m-dash]O, and sulfur-containing moieties), conferring their great aqueous dispersibility and photoluminescent stability under varying pH (2-12) and NaCl concentrations (0.0-2.0 M). The CDs were subsequently incorporated into chitosan/gelatin films at loadings of 0-10% relative to the polymer mass. At 5% loading, the films displayed a great tensile strength of 80.32 MPa,

SUBMITTER: Tran NT 

PROVIDER: S-EPMC12706845 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature