Adsorption and superficial transport of oil on biological and bionic superhydrophobic surfaces: a novel technique for oil-water separation

被引:34
作者
Barthlott, W. [1 ]
Moosmann, M. [1 ]
Noll, I [2 ]
Akdere, M. [2 ]
Wagner, J. [2 ]
Roling, N. [1 ]
Koepchen-Thomae, L. [1 ]
Azad, M. A. K. [1 ,4 ]
Klopp, K. [3 ]
Gries, T. [2 ]
Mail, M. [1 ,5 ]
机构
[1] Univ Bonn, Nees Inst Biodivers Plants, Venusbergweg 22, D-53115 Bonn, Germany
[2] Rhein Westfal TH Aachen, Inst Text Tech, Otto Blumenthal Str 1, D-52074 Aachen, Germany
[3] Heimbach GmbH, Gut Nazareth 73, D-52353 Duren, Germany
[4] Brac Univ, Sch Sci, 41 Mohakhali, Dhaka 1212, Bangladesh
[5] Karlsruhe Inst Technol, Karlsruhe Nano Micro Facil, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany
来源
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES | 2020年 / 378卷 / 2167期
关键词
oil adsorption; oil spill clean-up; air retention; Salvinia effect; textile; biomimetics; SALVINIA; DROPLET; FLOW;
D O I
10.1098/rsta.2019.0447
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
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)'.
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页数:15
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