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Recent Advances in Functional Nanomaterials for Enhancing Biopolymer-Based Active Food Packaging: A Review
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This review examines how nanomaterials such as nanoparticles, nanotubes, and nanofibers can be incorporated into biopolymer-based food packaging films to overcome the mechanical and antibacterial limitations of natural polymers, offering a more sustainable alternative to petroleum-derived plastic packaging.
Food packaging serves a pivotal role in daily life, facilitating the efficient transportation of food and extending its shelf life. Petroleum-derived plastic packaging is extensively employed; however, its non-biodegradable nature poses significant environmental pollution and ecological degradation. Natural polymers (e.g., proteins such as gelatin and corn gluten protein; polysaccharides including pectin, chitosan, starch, cellulose, and alginate) and synthetic polymers (e.g., polyvinyl alcohol, polylactic acid, and polyhydroxyalkanoates) can be utilized to fabricate food packaging films, thereby achieving green and eco-friendly objectives. Nevertheless, the inferior mechanical strength and inadequate antibacterial activity of biopolymer-based packaging have restricted their practical applications. In recent years, nanomaterials (e.g., nanoparticles, nanotubes, nanofibers, and nanosheets) have been employed to enhance the performance of food packaging, emerging as a research hotspot. Notably, nanoparticles possess unique properties, including a high specific surface area, excellent dispersibility, and multifunctionality, which enables them to be easily incorporated into film matrices. Owing to their unique chemical structures, nanoparticles form strong interactions with film matrices, leading to a denser spatial structure. This not only markedly enhances the mechanical strength of the films, but also simultaneously improves their antibacterial and antioxidant capabilities. This review classifies and summarizes common nanomaterials based on their chemical compositions, providing a theoretical foundation and technical reference for the future development and application of nanomaterials in the field of bio-based active food packaging.
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This review examines how incorporating nano- and microcapsules containing natural antimicrobial and antioxidant compounds into biodegradable packaging films can extend food shelf life. Researchers found that these capsules protect the active compounds during processing and allow their controlled release over time. The technology offers a promising alternative to synthetic preservatives while also reducing reliance on conventional plastics in food packaging.
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