Bioinspired Underwater Superoleophobic （Bioinspired水下Superoleophobic）.pdf

Research Article Bioinspired Underwater Superoleophobic Membrane Based on a Graphene Oxide Coated Wire Mesh for Efficient Oil/Water Separation Yu-Qing Liu,† Yong-Lai Zhang, *,† Xiu-Yan Fu,† and Hong-Bo Sun*,†,‡ †State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, and ‡College of Physics, Jilin University, 2699 Qianjin Street, Changchun 130012, China S *Supporting Information ABSTRACT: Inspired from fish scales that exhibit unique underwater super- oleophobicity because of the presence of micronanostructures and hydrophilic slime on their surface, we reported here the facile fabrication of underwater superoleophobic membranes by coating a layer of graphene oxide (GO) on commercially available wire meshes with tunable pore sizes. Using the wire mesh as a ready-made mask, GO- embellished mesh with open apertures (GO@mesh) could be readily fabricated after subsequent O2 plasma treatments from the back side. Interestingly, the congenital microstructures of the crossed microwires in combination with the abundant hydrophilic oxygen-containing groups of the GO layer endow the resultant GO@mesh with unique underwater superoleophobic properties. The antioil tests show that the underwater contact angles of various oils including both organic reagents (undissolved in water) and vegetable oil on GO@mesh exceed 150°, indicating the superoleophobic nature. In a representative experiment, a mixture of bean oil and water that imitates culinary sewage has been well separated with the help of our GO@mesh. GO-embellishe