Recent applications of regenerated cellulose films and hydrogels in food packaging

Nowadays, non-degradable plastic packaging materials have created significant disposal and pollution issues threatening human health and development. The utilization of biodegradable packaging materials can help address the issue. Cellulose is abundant and renewable, and cellulose-based materials have been regarded as an alternative to petroleum-based plastic food packaging. With the development of cellulose solvents, various regenerated cellulose films and hydrogels have been fabricated for different applications. In this review, we summarize the recent progress in the preparation of regenerated cellulose films and hydrogels, and highlight their potential applications as biodegradable packaging, active packaging, and intelligent packaging. Finally, the biodegradability and safety of cellulose-based materials are stated, and future opportunities and challenges in this active research area are described.