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Engineering Mechanically Strong and Bioactive Gelatin-Based Supramolecular Plastics via Hydrogen Bonding and Coordination Interactions for Food Packaging
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Scientists created a new food packaging material made from gelatin (a natural protein) combined with plant fibers and a plant-based antioxidant, designed to replace traditional plastic wrap. This bio-based film is strong, keeps food fresher longer (tested successfully on blueberries), fights bacteria, and breaks down naturally instead of sticking around in the environment for centuries. Since it's made from natural, biodegradable ingredients, it could help reduce our reliance on conventional plastics—which shed the microplastics increasingly found in our food, water, and even our bodies.
Developing high-performance biopackaging is crucial for mitigating plastic pollution and advancing a sustainable circular economy. Guided by a supramolecular design strategy, this work presented a novel, mechanically strong, and bioactive gelatin-based composite plastic film constructed by sequentially incorporating carboxylated cellulose nanofibers (CCNF), gallic acid (GA), and Al 3+, forming a multicross-linked network. The rigid CCNF phase drastically enhanced surface hydrophobicity (water contact angle: 113.9°). GA incorporation achieved near-complete DPPH/ABTS + free radical scavenging (∼100%), validated by practical blueberry preservation, and increased elongation at break by 384%, indicating a brittle-to-ductile transition. Subsequent Al 3+ coordination further strengthened the composite film, yielding a tensile strength of 28.7 MPa and a Young’s modulus of 828 MPa. The final multicross-linked film (GCGAF) exhibited excellent thermal stability, robust gas barrier properties, notable antibacterial activity, and favorable biodegradability. This work provides an effective strategy for fabricating high-performance gelatin-based supramolecular plastics with balanced and superior properties for practical packaging applications.
More Papers Like This
Engineering MechanicallyStrong and Bioactive Gelatin-BasedSupramolecular Plastics via Hydrogen Bonding and Coordination Interactionsfor Food Packaging
AI summary Read the abstract
Scientists created a new food packaging material made from gelatin (a natural protein) combined with plant fibers and antioxidant compounds, designed to replace conventional plastics. In tests, this material successfully kept blueberries fresh, resisted water and bacteria, and was strong and flexible—while also being biodegradable, meaning it breaks down naturally instead of contributing to plastic pollution or shedding microplastics into food. This matters because everyday plastic food packaging is a major source of environmental waste and potential microplastic exposure, so a sturdy, plant-based alternative could help protect both the planet and what ends up on
Impacts of diverse cross-linking agents on structure, physicochemical properties of chitosan/gelatin-based multifunctional films incorporated with curcumin as potential food packaging
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Scientists created a new type of food wrapping made from natural materials (chitosan and gelatin, derived from shellfish and animal collagen) plus turmeric's active compound, curcumin, as an alternative to plastic packaging. By adding different natural binding agents, they made this biofilm stronger, better at blocking UV light, and more effective at fighting food-spoiling bacteria and adding antioxidants — all while it slowly releases its beneficial compounds over time. This matters because it offers a promising, biodegradable alternative to conventional plastic food packaging, which sheds microplastics into our food and environment.
Active gelatin-based films incorporated with juçara (Euterpe edulis M.) extract: Mechanical, thermal, and antioxidant properties
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Scientists created a biodegradable food wrapping made from gelatin and juçara berry extract (a antioxidant-rich Brazilian superfruit) as an alternative to plastic packaging. The berry extract made the film stronger, better at blocking moisture, and packed with antioxidants that could help keep food fresher longer—meaning this could one day help cut down on plastic waste and the microplastics that come from it, while also reducing food spoilage.
An Antibacterial and Antioxidant Food Packaging Film Based on Amphiphilic Polypeptides‐Resveratrol‐Chitosan
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Researchers developed a biodegradable food packaging film made from natural materials including chitosan and resveratrol that kills bacteria and prevents food spoilage. Unlike conventional plastic packaging that breaks down into microplastics, this film is made entirely from biological materials and poses no microplastic contamination risk. This type of eco-friendly alternative could help reduce the microplastics that enter the food supply through traditional plastic packaging.
Protein amyloid fibrils for sustainable food packaging: From structural design and functional enhancement to preservation performance: A review.
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This review summarizes research on using tightly-folded protein fibers to create food packaging that could replace plastic. These protein-based films keep food fresher longer and break down naturally, potentially reducing microplastic pollution, though scientists still need to confirm they're safe for long-term use before they hit store shelves.
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