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Preparation and evaluation of chlorogenic acid‑loaded polyvinyl alcohol‑flaxseed gum biodegradable films for food preservation
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Scientists created a plant-based food wrap using flaxseed gum and a natural antioxidant from coffee beans, offering an eco-friendly alternative to plastic packaging. In tests, this wrap kept pork fresh for 9 days by fighting bacteria and spoilage, while also breaking down in soil, unlike traditional plastics that persist and shed microplastics into food and the environment.
Petroleum‑derived plastic packaging causes serious environmental pollution, and developing biodegradable active food packaging from natural biopolymers is highly desirable. Biodegradable active polyvinyl alcohol‑flaxseed gum (PVA‑FG) films incorporated with chlorogenic acid (CA) were prepared. FTIR and SEM confirmed well‑dispersed CA formed hydrogen bonds with polymers to improve mechanical strength and water resistance. Compared with the CA‑free PVA‑FG control film (15.28% DPPH and 3.66% ABTS scavenging), the optimized film loaded with 0.3% CA exhibited improved antioxidant capacity, with DPPH scavenging of 79.73%, ABTS scavenging of 71.19%, and 60.99% polyphenol oxidase (PPO) inhibition. It also produced a 15.48 mm inhibition zone also exerted effective against Staphylococcus aureus, indicating favorable antibacterial performance. In addition, the composite films displayed enhanced soil biodegradation compared with pure PVA film. Pork displayed that the PVA-FG-CA 0.3% film could effectively prolong shelf life to 9 days, showing great potential for eco‑friendly high‑fat‑food packaging.
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