Synthesis of highly hydrophobic floating magnetic polymer nanocomposites for the removal of oils from water surface

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• 作者：Mudan Chen ; Wei Jiang ; Fenghe Wang ; Ping Shen ; Peichang Ma ; Junjun Gu ; Jianyu Mao ; Fengsheng Li
• 关键词：Water&ndash ; oil separation ; Fe3O4@PS magnetic nanocomposites ; Highly hydrophobic and oleophilic properties
• 刊名：Applied Surface Science
• 出版年：1 December, 2013
• 年：2013
• 卷：286
• 期：Complete
• 页码：249-256
• 全文大小：1991 K

文摘

The removal of organic contaminants, particularly oil spills from water surface is of great technological importance for environmental protection. In this article, we present a novel, economic and environment-friendly core-shell composite material based on magnetic hollow Fe₃O₄ nanoparticles (MNPs) that was fabricated by two-step process, which can fast and efficiently separate oils from water surface under a magnetic field. The magnetic Fe₃O₄ nanoparticles (MNPs) were coated with a polystyrene layer successfully to form water-repellent and oil-absorbing surfaces, which could float on water and selectively absorb lubricating oil up to 3 times of the particles鈥?weight while completely repelling water. More importantly, the oils could be readily removed from the surfaces of nanocomposites by a simple treatment and the nanocomposites still kept highly hydrophobic and superoleophilic characteristics, so the nanocomposites have an excellent recyclability in the oil-absorbent capacity. Several techniques such as transmission electron microscope (TEM), X-ray diffraction (XRD), and thermogravimetric analysis (TGA) were used in the characterization of the materials. In addition, magnetic force and oils removal capability tests were also performed. It will open up a potential and broad application in wastewater treatment.