It is highly challenging to separate stabilized water/oil emulsions with sizes below 20 μm. Here, we propose a simple and scalable process via the in situ grafting of ZIF-8 nanoparticles and a poly(ionic liquid) (PIL) onto a commercial cotton cloth (CC) fabric. Switchable wettability between superhydrophilicity/underwater superoleophobicity and superhydrophobicity/superoleophilicity was easily realized via the anion exchange of the PIL. ZIF-8 nanoparticles effectively improved the superhydrophilicity and superolelphilicity of ZIF-8@PIL-grafted cotton cloth (CC-ZIF-PIL), while also performing the dual functions of the separation of oil-in-water (O/W) and water-in-oil (W/O) emulsions. Accordingly, effective water/oil emulsion separation with a high efficiency (η > 99%), selectivity, stability, and durability was obtained using the CC-ZIF-PIL. These features indicate that CC-ZIF-PIL has promising application in switchable water/oil emulsion separation devices.

中文翻译：

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ZIF-8 @聚（离子液体）接枝棉布，用于水/油乳化液分离

分离尺寸小于20μm的稳定化水/油乳化液具有很高的挑战性。在这里，我们通过原位提出了一个简单且可扩展的过程将ZIF-8纳米颗粒和聚离子液体（PIL）接枝到商用棉布（CC）织物上。通过PIL的阴离子交换，容易实现超亲水性/水下超疏油性与超疏水性/超亲油性之间的可切换润湿性。ZIF-8纳米颗粒可有效改善ZIF-8 @ PIL接枝棉布（CC-ZIF-PIL）的超亲水性和超亲油性，同时还具有水包油（O / W）和水分离的双重功能油包水（W / O）乳液。因此，使用CC-ZIF-PIL获得了高效（η> 99％），选择性，稳定性和耐久性的有效水/油乳液分离。这些特征表明，CC-ZIF-PIL在可切换的水/油乳化液分离装置中具有广阔的应用前景。