Abstract Flux decline of filtration membranes caused by oil pollutants is one of the most serious challenges for oil/water separation. Aiming at improving the anti-fouling property as well as the cyclic stability, a mineralized membrane was fabricated by growing cupric phosphate [Cu3(PO4)2] nanoparticles onto polyacrylic acid-grafted-poly (vinylidene fluoride) (PAA-g-PVDF) microfiltration membrane via soaking mineralization process for oil-in-water emulsion separation. The uniform distribution of Cu3(PO4)2 nanoparticles on both the membrane surface and the inner pores endows the membrane with rigid structure and superhydrophilic property, and thus outstanding anti-oil-fouling performance. The Cu3(PO4)2/PAA-g-PVDF mineralized membranes exhibit low decay rate of permeating flux during 2 h continuous test and a nearly 100% recovery ratio for the separation of various oil-in-water emulsions. Moreover, the membranes possess good mechanical and chemical stability toward ultrasonic, salts and wide pH range, which is promising for treating practical oily wastewater.

中文翻译：

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具有优异循环稳定性的磷酸铜矿化聚合物膜，用于油/水乳液分离

摘要 油类污染物引起的滤膜通量下降是油水分离面临的最严峻挑战之一。为了提高防污性能和循环稳定性，通过在聚丙烯酸接枝聚（偏二氟乙烯）（PAA-g-PVDF）上生长磷酸铜[Cu3(PO4)2]纳米颗粒来制备矿化膜微滤膜通过浸泡矿化工艺实现水包油乳液分离。Cu3(PO4)2纳米粒子在膜表面和内孔的均匀分布赋予了膜刚性结构和超亲水性能，从而具有优异的抗油污性能。Cu3(PO4)2/PAA-g-PVDF 矿化膜在 2 小时连续测试过程中表现出较低的渗透通量衰减率和近 100% 的分离各种水包油乳液的回收率。此外，该膜对超声波、盐类和较宽的pH范围具有良好的机械和化学稳定性，有望用于处理实际含油废水。