Membrane materials have been extensively applied in the field of separation of oil–water mixtures. However, most membrane materials are limited to separate oil–water mixtures and difficult to separate stable oil–water emulsions. Therefore, the polymer membrane, which is a type of underwater superoleophobic membrane material, has attracted extensive attention for its excellent antipollution performance and emulsion separation ability. In this work, we combined the synthesized poly (acrylic acid)-co-poly(3-[trimethoxysilyl]propyl methacrylate) (PAA-co-PTMSPMA) with micro–nanoparticles to modify polyvinylidene fluoride (PVDF) membranes. By means of this strategy, PVDF membranes with excellent superhydrophilicity–underwater superoleophobicity were successfully fabricated. The obtained PVDF membrane could efficiently realize the separation of various oil-in-water emulsions, and the separation efficiency was greater than 99%. In addition, the separation efficiency of the modified superhydrophilic PVDF membrane maintained stable after 10 separation cycles (>98.6%). When relying on this simple and eco-friendly preparation strategy, this superhydrophilic–underwater superoleophobic membrane material has broad application prospects in the field of industrial and domestic wastewater treatment.

中文翻译：

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基于超亲水和水下超疏油聚偏二氟乙烯膜的水包油乳液的高效分离

膜材料已广泛应用于油水混合物的分离领域。然而，大多数膜材料仅限于分离油水混合物，难以分离稳定的油水乳液。因此，高分子膜作为一种水下超疏油膜材料，以其优异的抗污染性能和乳化分离能力而受到广泛关注。在这项工作中，我们将合成的聚（丙烯酸）-共聚（3-[三甲氧基甲硅烷基]丙酯）（PAA-co-PTMSPMA）与微纳米颗粒相结合，对聚偏二氟乙烯（PVDF）膜进行改性。通过这种策略，成功制备了具有优异超亲水性-水下超疏油性的 PVDF 膜。所得PVDF膜可高效实现各种水包油乳液的分离，分离效率大于99%。此外，改性超亲水 PVDF 膜的分离效率在 10 次分离循环后保持稳定（>98.6%）。依靠这种简单环保的制备策略，这种超亲水-水下超疏油膜材料在工业和生活污水处理领域具有广阔的应用前景。