In this study, durable superhydrophobic fabrics with magnet responsive properties were prepared by a two-step coating technique using polydopamine (PDA), Fe3O4 nanoparticles, and hexadecyltrimethoxysilane as coating materials. The coated fabrics exhibit fast magnetic responsivity and a water contact angle of 156°. The coating is durable enough to withstand at least 50 cycles of home laundering and 500 cycles of Martindale abrasions without losing its superhydrophobicity and magnetic properties. The PDA pre-coating plays a significant role in improving the adhesion of hydrophobic Fe3O4 nanoparticles on fabric surface. The coated fabric is highly oleophilic (oil contact angle = 0°). When used for absorbing oil, the coated fabric floats naturally on the surface of oily water, and it can be moved to approach oil drops under magnetic actuation. The fabric is reusable for at least 10 cycles. This may offer an environmentally friendly way to prepare “smart” oil-recovery materials.
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机译：在这项研究中，通过使用聚多巴胺（PDA），Fe 3 O 4的两步涂覆技术制备了具有磁响应特性的耐用超疏水织物 纳米粒子和十六烷基三甲氧基硅烷作为涂料。涂层织物表现出快速的磁响应性和156°的水接触角。该涂层足够耐用，可以承受至少50次家庭洗涤和500次Martindale磨损，而不会失去其超疏水性和磁性。 PDA预涂层在改善疏水性Fe 3 O 4 纳米颗粒在织物上的附着力方面起着重要作用表面。涂层织物具有高度亲油性（油接触角= 0°）。当用于吸收油时，带涂层的织物会自然地漂浮在含油水的表面上，在磁力驱动下它可以移动到接近油滴的位置。织物可重复使用至少10个循环。这可以提供一种环境友好的方式来制备“智能”采油材料。
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