Active and intelligent pH-sensing food packaging developed by incorporation of red cabbage extracts in chicken gelatin-based composite films

Red cabbage extracts are rich in polyphenols from anthocyanins and possess potent antioxidant activity. This study, therefore, examined the active and intelligent biodegradable composite films of chicken skin gelatin and red cabbage extracts at different concentrations: 0% (film A), 1.5% (film B), 3.5% (film C), and 5.0% (film D). Incorporating red cabbage extracts into chicken skin gelatin films increased elongation at break but decreased tensile strength. The naked eye observed and...