A comparative study: Development and characterization of active biodegradable chicken skin and mammalian gelatin composite films incorporated with curcumin extracts

Abstract

This study aimed to develop active biodegradable composite films derived from chicken skin gelatin with the incorporation of rice starch (20% w/w) and curcumin (0.03 g). Characteristics such as the physical, mechanical and antioxidant properties of chicken skin gelatin composite films were investigated and compared with mammalian gelatin composite films. The results showed that chicken skin gelatin films possessed higher value in color (L*86.31, a*-6.44, b*86.45), light transparency (5.01%), mechanical strength (tensile strength 8.47 MPa and elongation at break 416.43%) and ABTS.+ activity (218.31 [TE]/g dried film) while lower in thickness (0.07 mm), and WVP (1.10 × 10−9 g/m s Pa) value compared with mammalian gelatin films. Meanwhile, there were no significant differences observed in terms of melting point, light transmission, biodegradation rate, and DPPH activity among all gelatin films. The incorporation of curcumin has been found to improve the barrier properties and antioxidant capacity of gelatin films. Novelty impact statement The comparison between chicken skin gelatin composite film with mammalian gelatin composite film was studied to highlight the possibilities and advantages of chicken skin gelatin films as alternative gelatin. The curcumin incorporation helps to exert high antioxidant capacity toward the gelatine-based film. Moreover, this new study will contribute to exploring new knowledge that might be useful for future applications, especially in the active food packaging industry.