Abstract：
Plastic food packaging, with its harmful migration of microplastics and nanoplastics into food, presents significant ecological imbalance and human health risks. In this regard, using food and agricultural byproducts as packaging materials reduces environmental and economic concerns and supports their sustainable management. Herein, cellulosic residue from corncob was employed as a renewable source for developing biodegradable packaging films. It was solubilized in ZnCl2 solution, crosslinked with Ca2+ ions, and plasticized with sorbitol to form films and used to improve the shelf-life of raspberries. The optimized film possesses water vapor permeability, tensile strength, and elongation at break of 1.8(4) x10-10 g-1 s-1 Pa-1, 4.7(1) MPa, and 15.4(7)%, respectively. It displays UV-blocking and antioxidant properties and biodegrades within 29 days at 24% soil moisture. It preserves raspberries for 7 and 5 more days at room temperature and refrigeration conditions, respectively, compared to polystyrene film. Overall, more value addition could be envisioned from agricultural residues to minimize post-harvest losses and food waste through biodegradable packaging, which also aids in mitigating plastic perils.
摘要：
塑料食品包装，随着微塑料和纳米塑料有害地迁移到食品中，存在显著的生态失衡和人类健康风险。在这方面,使用食品和农业副产品作为包装材料减少了环境和经济问题，并支持其可持续管理。在这里，玉米芯中的纤维素残留物被用作可生物降解的包装膜的可再生资源。它溶解在ZnCl2溶液中，与Ca2+离子交联，并用山梨糖醇增塑以形成薄膜，并用于改善覆盆子的保质期。优化后的薄膜具有水蒸气渗透性，抗拉强度,断裂伸长率为1.8(4)x10-10g-1s-1Pa-1,4.7(1)MPa,和15.4（7）％，分别。在24％的土壤水分下，它显示出紫外线阻断和抗氧化性能，并在29天内生物降解。它在室温和冷藏条件下将覆盆子保存7天和5天以上，分别,与聚苯乙烯薄膜相比。总的来说,可以设想从农业残留物中增加更多的价值，以通过可生物降解的包装将收获后的损失和食物垃圾降至最低，这也有助于减轻塑料危险。
