Resumen
Active packaging incorporated with natural extract is a promising technology to extend shelf life of perishable food. Therefore, this study aims to produce the bioactive edible film from semi refined carrageenan (SRC) plasticized with glycerol (G) enhance with nanocellulose as reinforcing agent and incorporated with natural extract to improve lipid oxidative stability and storage quality of apples. Besides, the eco-friendly packaging minimizes the accumulation of environment and also can reduce the consumption of synthetic antioxidant that can cause human health risk issue. In a previous study, preliminary screening of various Malaysian medicinal plants showed that PM possessed high antioxidant activity (>90%). The extraction of PM involved drying, grinding is performed to determine total phenolic content and antioxidant activity using TPC, DPPH and ABTS assays. In film preparation, SRC dissolve with nanocellulose and mixed with different concentration 0.4% (w/w) of Persicaria Minor (PM), tocopherol, BHA and heated until 90 °C through casting technique. Physical and mechanical test are performed to determine the transparency, colour and tensile strength. Besides, antioxidant release test film is performed to determine antioxidant activity of the film throughout storages. The developed films were wrapped with apples under refrigerated condition (4±°C) and monitored for 14 days storage period. It is expected that film wrapped with tocopherol exhibited significantly lower lipid deterioration rate analyzed by TBARS method and low changes of % metmyoglobin value that indicates the minimum development of brown color. Thus, it is expected that the new active packaging highly potential to be use as novel material to be used in food industry as wrapper for vegetables, fruits and chocolates and etc; as interleaf for frozen foods to avoid from rotten rapidly. Hence, the active packaging edible films incorporating PM displayed potential as a packaging material to improve food safety and quality of the meat.