Adsorption and superficial transport of oil on biological and bionic superhydrophobic surfaces: a novel technique for oil-water separation
| Autor: | Markus Moosmann, K. Klopp, N. Roling, J. Wagner, Wilhelm Barthlott, I. Noll, Musa Akdere, Thomas Gries, Matthias Mail, L. Koepchen-Thomä, M. A. K. Azad |
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| Rok vydání: | 2020 |
| Předmět: |
Technology
Absorption (acoustics) Materials science Time Factors 2018-019-021489 Surface Properties General Mathematics General Physics and Astronomy Nanotechnology Biocompatible Materials Chemistry Techniques Analytical FIB Adsorption Desorption Araceae Computer Simulation Petroleum Pollution Lotus effect Viscosity Textiles General Engineering Cistus Water Green Chemistry Technology Equipment Design Robotics Articles Cistaceae Environmentally friendly Biodegradation Environmental Salvinia effect Elastomers Brassicaceae AFM Biomimetics Science technology and society Streptophyta ddc:600 Hydrophobic and Hydrophilic Interactions Oils |
| Zdroj: | Philos Trans A Math Phys Eng Sci Philosophical transactions of the Royal Society of London / A, 378 (2167), Art. Nr.: 20190447 |
| ISSN: | 1471-2962 1364-503X |
| Popis: | Superhydrophobicity is a physical feature of surfaces occurring in many organisms and has been applied (e.g. lotus effect) in bionic technical applications. Some aquatic species are able to maintain persistent air layers under water ( Salvinia effect) and thus become increasingly interesting for drag reduction and other ‘bioinspired’ applications. However, another feature of superhydrophobic surfaces, i.e. the adsorption (not absorption) and subsequent superficial transportation and desorption capability for oil, has been neglected. Intense research is currently being carried out on oil-absorbing bulk materials like sponges, focusing on oleophilic surfaces and meshes to build membranes for oil–water separation. This requires an active pumping of oil–water mixtures onto or through the surface. Here, we present a novel passive, self-driven technology to remove oil from water surfaces. The oil is adsorbed onto a superhydrophobic material (e.g. textiles) and transported on its surface. Vertical and horizontal transportation is possible above or below the oil-contaminated water surface. The transfer in a bioinspired novel bionic oil adsorber is described. The oil is transported into a container and thus removed from the surface. Prototypes have proven to be an efficient and environmentally friendly technology to clean oil spills from water without chemicals or external energy supply. This article is part of the theme issue ‘Bioinspired materials and surfaces for green science and technology (part 3)’. |
| Databáze: | OpenAIRE |
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