Robust and Superhydrophobic Surface Modification by a 'Paint + Adhesive' Method: Applications in Self-Cleaning after Oil Contamination and Oil-Water Separation
Autor: | Nobuhiro Kanazawa, Jianhui Qiu, Ruilu Liang, Eiichi Sakai, Huixia Feng, Baiyi Chen |
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Rok vydání: | 2016 |
Předmět: |
Materials science
Abrasion (mechanical) Nanotechnology 02 engineering and technology Surface finish 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Superhydrophobic coating 0104 chemical sciences Scratch Robustness (computer science) Surface modification General Materials Science Adhesive Composite material 0210 nano-technology computer computer.programming_language Sandpaper |
Zdroj: | ACS applied materialsinterfaces. 8(27) |
ISSN: | 1944-8252 |
Popis: | Conventional superhydrophobic surfaces have always depended on expensive, sophisticated, and fragile roughness structures. Therefore, poor robustness has turned into the bottleneck for large-scale industrial applications of the superhydrophobic surfaces. To handle this problem, a superhydrophobic surface with firm robustness urgently needs to be developed. In this work, we created a versatile strategy to fabricate robust, self-cleaning, and superhydrophobic surfaces for both soft and hard substrates. We created an ethanol based suspension of perfluorooctyltriethoxysilane-mdodified calcium carbonate nanoparticles which can be sprayed onto both hard and soft substrates to form superhydrophobic surfaces. For all kinds of substrates, spray adhesive was directly coated onto abluent substrate surfaces to promote the robustness. These superhydrophobic surfaces showed remarkable robustness against knife scratch and sandpaper abrasion, while retaining its superhydrophobicity even after 30 abrasion cycles with sandpaper. What is more, the superhydrophobic surfaces have shown promising potential applications in self-cleaning and oil-water separation. The surfaces retained their self-cleaning property even immersed in oil. In addition to oil-water separation, the water contents in oil after separation of various mixtures were all below 150 ppm, and for toluene even as low as 55 ppm. Furthermore, the as-prepared device for oil-water separation could be cycled 6 times and still retained excellent oil-water separation efficiency. |
Databáze: | OpenAIRE |
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