Polymer Research Laboratory, Department of Chemistry, Sharif University of Technology, Tehran, 11365-9516, Iran.
Polymer Research Laboratory, Department of Chemistry, Sharif University of Technology, Tehran, 11365-9516, Iran.
Chemosphere. 2022 Jan;287(Pt 3):132254. doi: 10.1016/j.chemosphere.2021.132254. Epub 2021 Sep 15.
Herein, we demonstrated a facile method for the fabrication of magnetic and superhydrophobic polyurethane sponge with water contact angle of 159° as an adsorbent for cleanup the marine oil spill pollution. For this aim, a polyurethane sponge was coated with carbon black (CB), hexagonal boron nitride (h-BN)@FeO, and acrylic resin and then characterized by different techniques. Owing to the chemical and thermal stability of h-BN and CB, the modified sponge was stable under corrosive conditions (pH = 1-14 and salt solutions) and at different temperatures (-12 °C-105 °C). In addition to common oils and organic solvents, we also used the real spilled oils containing monoaromatics and polyaromatics in the water surfaces of the Persian Gulf for investigation of adsorption efficiency of sponge in a real condition. The oil adsorption capacity of this sponge was in the range of 64-176 g g. Also, this adsorbent can separate high amount of oil or organic solvents up to 66,400 times of its own weight from the oil-water mixture in a continuous separation. The results confirm that modified sponge can be used more than 20 times for oil spill cleanup without considerable reduction of its adsorption capacity. Consequently, the modified sponge is a promising candidate material for use in a real oil-water separation process.
在此，我们展示了一种简便的方法来制备具有 159°水接触角的磁性超疏水聚氨酯海绵，作为吸附剂用于清理海洋溢油污染。为此，我们将聚氨酯海绵涂覆了碳黑（CB）、六方氮化硼（h-BN）@FeO 和丙烯酸树脂，并通过多种技术对其进行了表征。由于 h-BN 和 CB 的化学和热稳定性，改性后的海绵在腐蚀性条件（pH=1-14 和盐溶液）和不同温度（-12°C-105°C）下都很稳定。除了常见的油和有机溶剂外，我们还使用了含有单芳烃和多芳烃的实际溢油在波斯湾水面上进行了在实际条件下海绵吸附效率的研究。这种海绵的吸油能力在 64-176 g/g 之间。此外，这种吸附剂可以从油水混合物中连续分离出高达其自身重量 66400 倍的高浓度油或有机溶剂。结果证实，改性海绵在用于清理溢油时可以使用 20 多次以上，而其吸附能力没有明显下降。因此，改性海绵是一种很有前途的用于实际油水分离过程的候选材料。
