Magnetically Driven Superhydrophobic Polyurethane Sponge for High Efficiency Oil/Water Mixtures Separation


Magnetically driven super-hydrophobic materials were prepared by Fe3O4 nanoparticles and stearic acid, which were deposited on the surface of polyurethane sponges. The presence of the Fe3O4 nanoparticles makes the sponge have the magnetic, and the micro-nano hierarchical structure and hydrophobic functional groups lead to the sponge have excellent superhydrophobicity. The as-prepared sponge exhibited excellent absorption capacities for various oils and organic solvents ranging from 23.8 times to 86.7 times of its own weight. Moreover, the oil separation capacities still keep a high value after 50 cycles of squeezing the saturated absorbed as-prepared sponge. All of these satisfactory properties make the as-prepared sponge as a candidate of ideal absorbents for oily industrial wastewater and oil spills in oceans.

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This work was supported by the National Nature Science Foundation of China (No. 21406188) and the Natural Science Foundation of the Department of Educational of Shaanxi Province (No. 17JS141). This work was also financially supported by the Training Program of Innovation and Entrepreneurship for Undergraduates of Yan’an University(No. D2017006), Financially supported by school-level research project of Yan’an University (No. YDK2015-68).

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Correspondence to Xuemei Zhang.

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Zhang, X., Fu, F., Gao, X. et al. Magnetically Driven Superhydrophobic Polyurethane Sponge for High Efficiency Oil/Water Mixtures Separation. J Bionic Eng 16, 38–46 (2019).

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  • superhydrophobic/superoleophilic materials
  • polyurethane sponge
  • magnetic driven
  • oil-water separation
  • continuous separation