Fruit preservation materials play an instrumental role in preventing fruit deterioration and extending shelf life. However, existing fresh-keeping materials often prove inadequate in simultaneously achieving antibacterial properties, maintaining freshness, antioxidant effects, good biocompatibility, and prolonged fruit shelf life. Therefore, we present the first preparation of a natural polysaccharide spray hydrogel (Q/O/Zn hydrogel), loaded with chlorogenic acid‑zinc nanoparticles (CA@ZnNPs), utilizing quaternary ammonium insect chitosan (QECS) and oxidized pullulan (OPUL) for the preservation of perishable fruits. The findings demonstrated that the Q/O/Zn hydrogel was highly effective in inhibiting the proliferation of S. aureus and E. coli, while also exhibiting remarkable scavenging capabilities about ABTS and DPPH radicals. Furthermore, the fruit preservation trials demonstrated that the Q/O/Zn hydrogel markedly reduced fruit respiration rates, decay rates, and weight loss across various temperatures while decreasing the species diversity and abundance of harmful bacteria on fruit surfaces. The Q/O/Zn hydrogel is promising for fruit preservation.

中文翻译：

---

多合一：利用载有多酚金属纳米颗粒的多功能天然多糖喷雾水凝胶进行水果保鲜


水果保鲜材料在防止水果变质和延长保质期方面发挥着重要作用。然而，现有的保鲜材料往往不足以同时实现抗菌性能、保持新鲜度、抗氧化作用、良好的生物相容性和延长水果的保质期。因此，我们首次制备了天然多糖喷雾水凝胶 （Q/O/Zn 水凝胶），该水凝胶负载绿原酸-锌纳米颗粒 （CA@ZnNPs），利用季铵虫壳聚糖 （QECS） 和氧化普鲁兰多糖 （OPUL） 用于保存易腐烂的水果。研究结果表明，Q/O/Zn 水凝胶在抑制金黄色葡萄球菌和大肠杆菌的增殖方面非常有效，同时对 ABTS 和 DPPH 自由基也表现出显著的清除能力。此外，水果保鲜试验表明，Q/O/Zn 水凝胶在不同温度下显著降低了果实的呼吸速率、腐烂速率和重量损失，同时降低了果实表面有害细菌的物种多样性和丰度。Q/O/Zn 水凝胶有望用于水果保鲜。