Abstract
The leakage of oil or organic pollutants into the ocean arouses a global catastrophe. The superhydrophobic materials have offered a new idea for the efficient, thorough and automated oil/water separation. However, most of such materials lose superhydrophobicity when exposed to hot water (e.g. >55 °C). In this study, a hot water-repellent superhydrophobic mesh used for oil/water separation was prepared with one-step spray of modified polyurethane and hydrophobic silica nanoparticles on the copper mesh. The as-prepared superhydrophobic mesh could be applied as the effective materials for the separation of oil/water mixture with a temperature up to 100 °C. In addition, the obtained mesh could selectively remove a wide range of organic solvents from water with high absorption capacity and good recyclability. Moreover, the as-prepared superhydrophobic mesh shows excellent mechanical durability, which makes it a promising material for practical oil/water separation.
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