A research team at the Ohio State University was inspired by the structure of the lotus leaf to develop a new type of low-cost stainless steel mesh material that allows water to pass through and block oil passage. The team was led by Prof. Bharat Bhushan and Philip Brown. According to them, the development of this material was inspired by the lotus structure. All the materials are very cheap and can separate water and oil at a very low cost. The cost per square foot is at least lower than traditional materials. 1.
The lotus leaf is covered with countless tiny raised holes, each of which is finer than hair. When water flows through, it allows water to collect into water droplets and absorb moisture from it. However, it can block the entrance of grease, according to this configuration. The scientific team developed a mesh material that also allows water to flow smoothly and block oil layers. The scientists first sprayed silica nano-particles on a fine steel mesh to create raised holes similar to the lotus leaf. Superimposed on the oil-repellent surface, the new coating material is only a few hundred nanometers thick. After testing in the lab, the results are quite satisfactory. The research team believes that the large area of ​​stencil material can be applied to large-scale water and oil separation operations.
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