Zwitterion polyurethanes (ZPU) are used for non-fouling and antimicrobial surfaces but their sensitive nature under ultra-violet (UV) radiations limits the requirements of engineering materials. Herein, ZPU is successfully synthesized and then prepared different TiO₂/ZPU composites, aiming to increase the service life of ZPU and to form active film for food packaging applications. The thermo-mechanical results revealed that the 4% TiO₂/ZPU sample exhibits better performance, as evidenced through tensile testing and surface morphology analysis. The UV–Vis spectra results indicated that the rutile TiO₂ nanoparticles can enhance the UV absorption and visible light reflectance, decreasing photoaging properties of composites thereby prolonging its shelf life. Moreover, scanning electron microscopy (SEM) observation after 5 h irradiation of UV light confirmed the photostability of TiO₂/ZPU composite film. Further, the antioxidant ability of ZPU is increased from 51% to 71% with TiO₂. The results of antimicrobial activity of TiO₂/ZPU demonstrate strong bacterial growth inhibition against E. coli that regards its suitability for food and other packaging applications. Besides, the food preservation ability is monitored by visual changes of tomato fruit. In essence, we anticipate that the TiO₂/ZPU composite films possessed all expected features to be considered as photostable material for food packaging.

两性离子聚氨酯（ZPU）用于防污和抗菌表面，但是它们在紫外线（UV）辐射下的敏感性限制了工程材料的要求。本文成功地合成了ZPU，然后制备了不同的TiO ₂ / ZPU复合材料，目的是延长ZPU的使用寿命并形成用于食品包装的活性薄膜。通过拉伸试验和表面形态分析证明，热力学结果表明4％TiO ₂ / ZPU样品表现出更好的性能。紫外-可见光谱结果表明，金红石型TiO ₂纳米颗粒可以增强紫外线吸收和可见光反射率，降低复合材料的光老化性能，从而延长其保质期。此外，在紫外线照射5小时后的扫描电子显微镜（ SEM）观察证实了TiO ₂ / ZPU复合膜的光稳定性。此外，用TiO ₂将ZPU的抗氧化能力从51％增加到71％。TiO ₂ / ZPU的抗菌活性结果表明，针对大肠杆菌的强细菌生长抑制作用使其适用于食品和其他包装应用。此外，通过番茄果实的视觉变化来监测食品的保鲜能力。本质上，我们预计TiO ₂/ ZPU复合膜具有所有预期的特征，可以用作食品包装的光稳定材料。