Wastewater discharged in human daily life, and oil spill accidents occurred frequently. The novel interface materials used for controllable oil/water separation have gained more and more attention. In this work, a facile, environmentally friendly approach is presented to fabricate a magnetic textile fabric with pH-controllable wettability between superhydrophobicty and superhydrophilicity. We prepared this magnetic textile fabric by immersing in lauric acid (LA)-TiO₂ composites and Fe₃O₄ nanoparticles. The resulted pH-conrtollable textile fabric possessed selective separation performance for oil/water mixtures with efficiency higher than 99% and high flux for oil (11000 L h^-1 m^-2). Moreover, the magnetic material is recyclable, the detailed experiments were conducted in this work for 25 cycles of oil/water mixture separation remaining unchangeable separation efficiency (>98%). For neutral water (e.g., at pH 7), the novel Fe₃O₄/LA-TiO₂ textile fabric demonstrated superhydrophobicity/ superoleophilicity in air. For alkaline water (e.g., at pH 12), the textile fabric showed superhydrophilicity and underwater superoleophobicity. The Fe₃O₄/LA-TiO₂ textile fabric could separate a series of light or heavy oil/water mixtures with high separation efficiency up to 99.1%, high oil flux of 7400–11000 L h^-1 m^-2 and water flux of 5300–5700 L h^-1 m^-2. In addition, thermal stability (∼180 ⁰C) and long exposure to ultraviolet rays showed that the textile fabric was stable in harsh environment. The textile fabric can be easily removed through a magnet due to its magnetic properties. It can be concluded from the results that Fe₃O₄/LA-TiO₂ textile fabric is a good candidate for practical applications, such as water restoration and oil-spill treatment.

人类日常生活中排放的废水和溢油事故屡屡发生。用于可控油水分离的新型界面材料受到越来越多的关注。在这项工作中，提出了一种简便，环保的方法来制造磁性织物，该织物在超疏水性和超亲水性之间具有pH值可控制的润湿性。我们通过将其浸入月桂酸（LA）-TiO ₂复合材料和Fe ₃ O ₄纳米颗粒中来制备这种磁性织物。所得的pH值可控织物对油/水混合物具有选择性分离性能，效率高于99％，对油的通量较高（11000 L h ^-1 m ^-2）。此外，磁性材料是可回收的，在这项工作中进行了详细的实验，对油/水混合物分离进行了25个循环，分离效率保持不变（> 98％）。对于中性水（例如，在pH值为7的情况下），新型Fe ₃ O ₄ / LA-TiO ₂织物在空气中表现出超疏水性/超亲油性。对于碱性水（例如，pH为12），织物显示出超亲水性和水下超疏油性。Fe ₃ O ₄ / LA-TiO ₂织物可以分离一系列轻油或重油/水混合物，分离效率高达99.1％，高油流量为7400–11000 L h ^-1 m ^-2和水通量为5300-5700 L h ^-1 m ^-2。另外，热稳定性（〜180 ⁰ C）和长时间暴露于紫外线表明该织物在恶劣环境下是稳定的。由于其磁性，可以通过磁体容易地除去织物。从结果可以得出结论，Fe ₃ O ₄ / LA-TiO ₂纺织织物是诸如水修复和溢油处理等实际应用的良好候选者。