부산대학교 도서관

In this research, dual-activated wheat gluten-based nanocomposite active films reinforced by chitosan nanofibers (CHNF) was developed, as well as co-loaded with betanin (BET) and carvone (CAR) for application in food packaging. Free and cationic inulin-coated nanoliposomal forms of BET/CAR were incorporated into the gluten films at 0, 5, and 10% (w/w) gluten concentrations. Fourier-transform infrared spectroscopy was used to detect the formation of new hydrogen bonds between gluten, CHNF, and nanoliposomes (NLPs). Differential scanning calorimetry analysis revealed that the addition of free BET/CAR reduced the endothermic transition temperature of films as compared to the unfortified film; however, the addition of NLPs had no effect on the thermal profile. Similar changes were observed in the crystallinity of films as determined by X-ray powder diffraction analysis. FE-SEM results showed that the incorporation of CHNF and BET/CAR NLPs did not alter the morphology of films but the free BET/CAR induced aggregates formation on the films' surface. CHNF addition enhanced the mechanical, water barrier, and wettability of films. Among the films tested, those containing BET/CAR NLPs had the highest antioxidant potential. However, the encapsulated BET/CAR in inulin-coated NLPs had an improved antimicrobial activity. The films containing the nanoliposomal form of BET/CAR indicated a controlled release behavior.