Department of Physical Chemistry, Faculty of Basic Science, Tarbiat Modares University, Tehran, Iran.
Department of Physical Chemistry, Faculty of Basic Science, Tarbiat Modares University, Tehran, Iran.
Chemosphere. 2023 Nov;340:139936. doi: 10.1016/j.chemosphere.2023.139936. Epub 2023 Aug 22.
Seawater pollution from various sources such as industrial effluents, ship washing at sea, and oil spills harm humans and the marine environment. Therefore, finding ways to eliminate this pollution is crucial. This study successfully modified a polyurethane sponge through a simple dip-coating method with functionalized graphene oxide incorporating octadecylamine and oleic acid, resulting in a hydrophobic sponge capable of absorbing crude oil and various organic solvents. Characterization analyses confirmed the synthesis. The absorption capacity of the modified sponges was examined, for example, the PU sponge has absorbed 4 g/g engine oil, while the modified GO-ODA-PU sponge has increased its absorption to 36 g/g. The GO-ODA-PU sponge demonstrated great reusability compared to the GO-OA-PU sponge owing to the strong covalent bond formed between GO and ODA, which is superior to the weak hydrogen bond formed between GO and OA. The absorption capacity of the GO-OA-PU sponge decreased by 30%. The contact angle test showed that GO-ODA-PU and GO-OA-PU sponges had contact angles of 131° and 115°, respectively. Additionally, the GO-ODA-PU sponge performed optimally for semi-polar solvents in the solubility parameter range of 18-19, with its absorption capacity reaching its maximum value. The amount of oil recycling is even possible up to 98%.
海水受到各种来源的污染，如工业废水、海上船舶清洗和溢油，对人类和海洋环境造成危害。因此，寻找消除这种污染的方法至关重要。本研究通过简单的浸涂法成功地对聚氨酯海绵进行了改性，其中包含功能化的氧化石墨烯，同时结合了十八胺和油酸，得到了一种疏油的海绵，能够吸收原油和各种有机溶剂。通过表征分析证实了合成。研究了改性海绵的吸收能力，例如，PU 海绵可以吸收 4 克/克发动机油，而改性的 GO-ODA-PU 海绵的吸收能力增加到 36 克/克。与 GO-OA-PU 海绵相比，GO-ODA-PU 海绵由于 GO 和 ODA 之间形成的强共价键而具有更好的可重复使用性，这优于 GO 和 OA 之间形成的弱氢键。GO-OA-PU 海绵的吸收能力下降了 30%。接触角测试表明，GO-ODA-PU 和 GO-OA-PU 海绵的接触角分别为 131°和 115°。此外，GO-ODA-PU 海绵在溶解度参数为 18-19 的半极性溶剂中表现最佳，其吸收能力达到最大值。甚至可以回收 98%的油量。
