Abstract
Polybutylene adipate-terephthalate (PBAT) offers a convincing ecological alternative to the traditional fossil-based plastics due to its biodegradability and robust mechanical properties. The objective of this study is to develop PBAT-based bio-composite films through incorporating functionalized cellulose nanocrystals (CNC) and curcumin (CUR). In order to improve the interfacial compatibility with the PBAT matrix and co-doping with CUR, CNC was modified using dodecyl succinic anhydride (D(x)CNC). In this ternary bio-composite system, CUR functioned as a bio-based antioxidant and antimicrobial agent. The presence of CUR also provides excellent UV-shielding properties, whereas the D(x)CNC effectively enhances the controlled release of CUR. The synergistic effect between D(x)CNC and CUR in boosting antimicrobial properties, with the inhibition values for E. coli and S. aureus reached 1.82 log CFU/cm(2) and 2.12 log CFU/cm(2), respectively. These findings indicate D(x)CNC/CUR/PBAT ternary composite films as a promising material for eco-friendly packaging products.