One-Step Dipping Fabrication of Fe3O4/PVDF-HFP Composite 3D Porous Sponge for Magnetically Controllable Oil-Water Separation

Jiatu Li, Mizuki Tenjimbayashi, Nicole S. Zacharia, Seimei Shiratori

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)


Industrial oil spills in various bodies of water is a worldwide environmental problem that requires effective oil absorbents with remote controllability, which would be a clear improvement upon currently used technologies. One approach for adding remote controllability is embedding magnetic particles into the oil absorbent materials; however, there are currently few reports of magnetic oil absorbents. Most of these are prepared through multistep processes or using hazardous materials, which inhibits their practical use. In this study, we introduce a single-step dipping method to simultaneously provide both magnetic and hydrophobic/oleophilic functions to melamine foam by combining hydrophobic flexible copolymer poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and magnetic Fe3O4 nanoparticles synthesized by a method suitable for mass production. The as-fabricated coating performs effectively for oil collection of oil spilled on water, and the movement of the foam on the water's surface can be effectively controlled under magnetic field without touching it directly. Also, the coating is capable of regenerating its oil-absorbing property by being wrung out after the initial absorption owing to its flexibility and separation of oil in a water-in-oil emulsion. Such a simple method for the creation of multifunction material could potentially be helpful for the development of commercial remediation materials.

Original languageEnglish
Pages (from-to)10706-10713
Number of pages8
JournalACS Sustainable Chemistry and Engineering
Issue number8
Publication statusPublished - 2018 Aug 6


  • Magnetic manipulation
  • One-step dipping method
  • Superoleophilic
  • Surface chemistry
  • Water purification

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment


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