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

Wu，Shiyu1,2; Xiang，Yunjie3; Cai，Yaqi1,2,3; Liu，Jingfu2,3,4

2024-05-01

10.1016/j.jes.2023.05.024

Journal of Environmental Sciences (China)   Impact Factor & Quartile

1001-0742

1878-7320

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 FeO@SiO 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.

Adsorption capacity Fe3O4@SiO2-OTS polyurethane sponge Oil-spill recovery Oil-water separation

English

Corresponding

National Natural Science Foundation of China[21827815];National Natural Science Foundation of China[42192571];

2-s2.0-85160846174

Scopus

1.Sino-Danish College,University of Chinese Academy of Sciences,Beijing,100049,China
2.State Key Laboratory of Environmental Chemistry and Ecotoxicology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing,100085,China
3.School of Environment,Hangzhou Institute for Advanced Study,UCAS,Hangzhou,310024,China
4.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Wu，Shiyu,Xiang，Yunjie,Cai，Yaqi,等. Superhydrophobic magnetic Fe3O4 polyurethane sponges for oil–water separation and oil-spill recovery[J]. Journal of Environmental Sciences (China),2024,139:160-169.

Wu，Shiyu,Xiang，Yunjie,Cai，Yaqi,&Liu，Jingfu.(2024).Superhydrophobic magnetic Fe3O4 polyurethane sponges for oil–water separation and oil-spill recovery.Journal of Environmental Sciences (China),139,160-169.

Wu，Shiyu,et al."Superhydrophobic magnetic Fe3O4 polyurethane sponges for oil–water separation and oil-spill recovery".Journal of Environmental Sciences (China) 139(2024):160-169.