Design of robust separation materials with superwettability for efficient oil–water separation is of great significance because of the serious problem of oil leakage. Herein, we have fabricated a superwetting material based on copper foam via chemical oxidation and hydrothermal method for oil–water separation. These modified copper foam with rough structure exhibit excellent superhydrophilicity and underwater superoleophobicity. Thus, it shows high oil–water separation efficiency (99%), excellent circulation and high-flux (24,129 Lm⁻² h⁻¹). Meanwhile, the modified copper foam exhibits favorable durability and stability under extreme environment conditions, such as immersion tests in salt, different pH conditions, high temperature and mechanical abrasion tests. Therefore, the modified copper foam has the advantages of high separation efficiency and remarkable stability, and is promising material, which can be used for the treatment of industrial oily wastewater.

中文翻译：

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一种用于高效和可重复油水分离的稳健超亲水和水下超疏油泡沫铜的简便制备

由于漏油问题严重，设计具有超润湿性的稳健分离材料以实现高效的油水分离具有重要意义。在此，我们通过化学氧化和水热法制备了一种基于泡沫铜的超润湿材料，用于油水分离。这些具有粗糙结构的改性泡沫铜表现出优异的超亲水性和水下超疏油性。因此，它显示出高油水分离效率 (99%)、良好的循环和高通量 (24,129 Lm ^-2  h ^-1）。同时，改性泡沫铜在极端环境条件下表现出良好的耐久性和稳定性，如盐浸试验、不同pH条件、高温和机械磨损试验。因此，改性泡沫铜具有分离效率高、稳定性好等优点，是一种很有前途的材料，可用于工业含油废水的处理。