Superhydrophobic magnetic Fe3O4 polyurethane sponges for oil–water separation and oil-spill recovery

IF 6.9 Q1 Environmental Science Journal of environmental sciences Pub Date : 2023-05-25 DOI:10.1016/j.jes.2023.05.024
Shiyu Wu , Yunjie Xiang , Yaqi Cai , Jingfu Liu
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Abstract

The effective and affordable separation of oil and water, a crucial process in the safe handling of environmental disasters such as crude oil spills and recovery of valuable resources, is a highly sought-after yet challenging task. Herein, superhydrophobic PU sponge was fabricated for the fast and cost-effective adsorptive separation of oil and different organic solvents from water. Octadecyltrichlorosilane (OTS)-functionalized Fe3O4@SiO2 core–shell microspheres were dip-coated on the surface of porous materials via a dip-coating process, thereby endowing them with superhydrophobicity. Owing to the hydrophobic interaction between OTS molecules and oil and increased capillary force in the micropores, the resulting superhydrophobic sponge served as a selective oil-sorbent scaffold for absorbing oil from oil–water mixtures, including oil–water suspensions and emulsions. Remarkably, after the recovery of the adsorbed oil via mechanical extrusion, these superhydrophobic materials could be reused multiple times and maintain their oil–water separation efficacy even after 10 oil–water separation cycles.

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用于油水分离和溢油回收的超疏水磁性Fe3O4聚氨酯海绵
有效和负担得起的油水分离是安全处理原油泄漏等环境灾害和回收宝贵资源的关键过程,是一项备受追捧但具有挑战性的任务。本文制备了超疏水聚氨酯海绵,用于快速、经济高效地从水中吸附分离油和不同有机溶剂。十八烷基三氯氢硅(OTS)-功能化Fe3O4@SiO2采用浸涂法将核壳微球浸涂在多孔材料表面,赋予其超疏水性。由于OTS分子和油之间的疏水相互作用以及微孔中毛细管力的增加,所得到的超疏水海绵充当了从油水混合物(包括油水悬浮液和乳液)中吸收油的选择性油吸附剂支架。值得注意的是,通过机械挤出回收吸附的油后,这些超疏水材料可以多次重复使用,即使在10次油水分离循环后也能保持其油水分离效果。
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百灵威 Ferric chloride hexahydrate
¥15.00~¥57619.42
百灵威 ammonia
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百灵威 sodium dodecyl sulfate
¥18.00~¥32009.70
百灵威 sodium acetate
¥15.00~¥12933.90
来源期刊
Journal of environmental sciences
Journal of environmental sciences Environmental Science (General)
CiteScore
12.80
自引率
0.00%
发文量
0
审稿时长
17 days
期刊介绍: Journal of Environmental Sciences is an international peer-reviewed journal established in 1989. It is sponsored by the Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, and it is jointly published by Elsevier and Science Press. It aims to foster interdisciplinary communication and promote understanding of significant environmental issues. The journal seeks to publish significant and novel research on the fate and behaviour of emerging contaminants, human impact on the environment, human exposure to environmental contaminants and their health effects, and environmental remediation and management. Original research articles, critical reviews, highlights, and perspectives of high quality are published both in print and online.
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