production and evaluation of chitosan-collagen nanocomposite packaging film from chicken feet waste

Background: annually, approximately 3.9 million metric tons of chicken feet are produced. as a common poultry by-product, they are a rich collagen source, representing over 40% of total amino acids. to maximize their potential, innovative utilization is required to enhance their value. the study aimed to investigate the use of broiler chicken feet for producing acid-hydrolyzed collagen and incorporating it into chitosan-collagen composite films, including nanocomposite films.methods: chitosan film, chitosan-collagen composite film, and chitosan-collagen nanocomposite film were prepared. physical, mechanical, antioxidant, and antimicrobial properties of these composite films were evaluated and compared to identify the most suitable material for food packaging.results: chitosan-collagen nanocomposite film demonstrated favorable characterizations, including mechanical, physical, antioxidant, and antimicrobial properties, in addition to lower oxygen permeability than other films.conclusion: chitosan-collagen nanocomposite film is suitable as a packaging material for preservation purposes, especially in animal-based or high-fat foods.