超疏水涂层由于不像荷叶那样容易被水润湿，因此可以广泛应用于许多领域。然而，大多数超疏水涂层难以承受磨损攻击。本文以聚丙烯酸嵌段聚苯乙烯（PAA-b-PS）两亲嵌段共聚物和中空NH 2 -SiO 2微球为原料，采用乳液界面合成法合成空心SiO 2 /PAA-b-PS Janus微球。 . 由于接枝有机聚合物链的半球是疏水的，另一半球是亲水的并含有氨基，因此空心SiO 2/PAA-b-PS Janus微球表现出两亲性和不对称性，是典型的无机/聚合物Janus微球。使用中空SiO 2轻松实现坚固的超疏水涂层/PAA-b-PS Janus 微球在聚氨酯预处理基材（如皮革和织物）上。经过 90 次砂纸磨损循环后，坚固的超疏水涂层仍保持出色的超疏水性。正如预期的那样，坚固的超疏水涂层对不同的污染物具有突出的自清洁性能，能够以超高的分离效率分离各种油水混合物。即使经过 40 次分离循环，坚固的超疏水涂层对油水混合物的分离效率仍保持在 98% 以上。总体而言，由空心 SiO 2构成的坚固超疏水涂层/PAA-b-PS Janus微球具有优异的超疏水性、耐磨性、自洁性、油水分离能力和通用性，在多功能涂料中具有广阔的应用前景。

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Superhydrophobic coating can be widely used in many fields because it is not easily wetted by water like lotus leaves. However, most of superhydrophobic coating is difficult to withstand abrasion attack. Herein, hollow SiO2/PAA-b-PS Janus microspheres were synthesized via emulsion interfacial synthesis method using amphiphilic block copolymer of polyacrylic acid block polystyrene (PAA-b-PS) and hollow NH2-SiO2 microspheres as raw materials in this paper. Because the hemisphere grafting organic polymer chain was hydrophobic and the other hemisphere was hydrophilic and contained amino groups, hollow SiO2/PAA-b-PS Janus microspheres exhibited amphiphilic and asymmetrical nature, which was a typical inorganic/polymer Janus microspheres. Robust superhydrophobic coating was facilely achieved using hollow SiO2/PAA-b-PS Janus microspheres on polyurethane pretreated substrate like leather and fabric. Robust superhydrophobic coating after 90 sandpaper abrasion cycles still retained excellent superhydrophobicity. As expected, robust superhydrophobic coating had prominent self-cleaning property against different pollutants and was capable to separate a variety of oil–water mixtures with ultrahigh separation efficiency. The separation efficiency of robust superhydrophobic coating for oil–water mixture was maintained above 98% even after 40 separation cycles. In total, robust superhydrophobic coating constructed by hollow SiO2/PAA-b-PS Janus microspheres possesses distinguished superhydrophobicity, abrasion resistance, self-cleaning, oil–water separation capacity and universality, which shows a promising application in multifunctional coating.