Development of temperature-regulating CR/PVA bionanocomposite films with phase change materials and antibacterial properties for ice cream packaging.

This study focuses on the development of active packaging for anti-heating food packaging using film materials based on Carrageenan (CR) and polyvinyl alcohol (PVA). The aim is to effectively manage the temperature of food products during storage and transportation to preserve their quality and freshness. Temperature-controlled bionanocomposite films were synthesized by incorporating phase change materials (PCMs) into the CR/PVA blend matrix. Specifically, polyethylene glycol (PEG) was grafted onto cellulose nanocrystals supported by copper nanoparticles to create a solid-solid PCM-Cu with exceptional thermal storage efficiency. The resulting nanocomposite films exhibited buffering properties at cold chain temperatures compared to pure CR/PVA films. The presence of copper nanoparticles also contributed antibacterial activity, further ensuring food safety. These nanocomposite films demonstrate significant potential for application in food packaging, as they effectively address temperature-related challenges within the food industry. The findings highlight the effectiveness of these innovative films in preserving the freshness of ice cream even when exposed to periods outside the freezer.