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Fabrication of a Superamphiphilic SS-400 Oil Separator Surface Using a Ag-Doped ZnO Nanorod Coating

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A simple fabrication technique is described for preparing Ag-doped ZnO nanorods using a rapid hydrothermal technique to create a superamphiphilic surface on SS-400 substrates. The high roughness resulting from Ag-doped ZnO nanorod surfaces is responsible for generating the superamphiphilic property of the SS-400 substrate. The fabricated surface shows contact angles (CAs) of almost 0° for water and olive oil, resulting in complete spreading of water and oily liquids. The fabricated surface also exhibits excellent superamphiphilic properties after long-term storage, thermal, and mechanical testing. However, after modification with a lowsurface-energy material (stearic acid), the fabricated surface exhibits superhydrophobic properties with water CAs of 158° and sliding angles (SAs) of less than 5°. We also applied our fabrication method to a helical-type oil separator. The oil separator, when treated with Ag-doped ZnO nanorods with a superamphiphilic surface, improved its oil separation efficiency and pressure drop compared with those of a commercial oil separator. Thus, our surface fabrication technique can be implemented easily to large-area, three-dimensional surfaces. Due to their ease and rapidity of manufacture and long-term wetting stability, these surfaces are potentially suitable for large-scale industrial applications in a variety of fields.
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Keywords: AG-DOPED ZNO; CONTACT ANGLE; OIL-SEPARATOR; SS-400; SUPERAMPHIPHILIC

Document Type: Research Article

Publication date: August 1, 2016

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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