目的 为了研究低耗能、低成本的食品保鲜方法，创建一种可日光驱动的抗菌纳米纤维膜。方法 通过静电纺丝技术结合光敏性化学物质制备聚乙烯醇(PVA)纳米纤维膜，通过扫描电镜、傅里叶红外光谱、热重分析、水接触角、耐水试验、活性氧的释放以及抑菌试验对纳米纤维膜进行表征。结果 光敏性物质二苯甲酮四羧酸二酐(BTDA)成功地接枝在PVA纳米纤维膜上，并在日光驱动下，可以释放活性氧，对致病菌具有杀灭作用。结论 该纳米纤维膜在日光的驱动下，可以有效地产生活性氧，从而杀灭微生物，因此可以在食品抗菌包装方面有新的应用。

The work aims to prepare a daylight-driven antibacterial nanofiber membrane, in order to develop a low-energy and low-cost food preservation method. The polyvinyl alcohol (PVA) nanofiber membrane was prepared by the combination of electrospinning and photosensitive chemicals. The nanofiber membrane was characterized by scanning electron microscopy, Fourier infrared spectroscopy, thermogravimetric analysis, water contact angle, water resistance test, release of active oxygen and antibacterial experiment. The photosensitive benzophenone tetracarboxylic dianhydride (BTDA) was successfully grafted on the PVA nanofiber membrane and released active oxygen under the driving of daylight, which could effectively kill pathogenic bacteria. In conclusion, the nanofiber membrane can effectively produce active oxygen under the driving of daylight, thereby killing microorganisms. Therefore, it will be newly applied to antibacterial food packaging.