This study aims to explore the effects of gamma rays on various properties of poly(1,1-difluoroethylene) (PVDF) membranes under different irradiation conditions. The effects of ⁶⁰Co γ-ray irradiation on the hydrophilicity, permeability, and mechanical performances of the PVDF membranes were discussed. Results showed that the size of the radiation dose rate had almost no effect on the performance of the membranes, as determined by the total radiation dose. The fracture and collapse of the PVDF structure under anaerobic conditions were obviously lower than those under aerobic conditions. Advanced characterization methods confirmed that the initial impact of gamma rays on the PVDF membranes occurred between 50 and 200 kGy. When the total dose exceeded 200 kGy, structural collapse and chain scission caused by the oxidative degradation mechanism became widespread, thereby leading to the relaxation of the PVDF network and the decline in properties. This study provides valuable information for the application of PVDF membranes to radioactive wastewater and clarifies the mechanism of membrane irradiation degradation to help prolong the service life of membranes. In addition, low total irradiation dose can embellish polymers and thus provide a feasible method for modifying and grafting polymer membranes in the future.

本研究旨在探讨伽马射线在不同辐照条件下对聚（1,1-二氟乙烯）（PVDF）膜的各种性能的影响。效果⁶⁰讨论了 Co γ 射线辐照对 PVDF 膜的亲水性、渗透性和机械性能的影响。结果表明，辐射剂量率的大小对膜的性能几乎没有影响，这是由总辐射剂量决定的。PVDF结构在厌氧条件下的断裂和倒塌明显低于好氧条件。先进的表征方法证实，伽马射线对 PVDF 膜的初始影响发生在 50 到 200 kGy 之间。当总剂量超过 200 kGy 时，氧化降解机制引起的结构坍塌和断链现象变得普遍，从而导致 PVDF 网络松弛和性能下降。该研究为PVDF膜在放射性废水中的应用提供了有价值的信息，并阐明了膜辐照降解的机理，有助于延长膜的使用寿命。此外，较低的总辐照剂量可以修饰聚合物，从而为未来聚合物膜的改性和接枝提供一种可行的方法。