Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 634, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2021.127968
Keywords
Pulse electrodeposition; Wear-resistance; Chemical stability; Oil/water separation; Ultra-high separation flux
Categories
Funding
- National Natural Science Foundation of China [52175387, 51675105]
- National Natural Science Foundation of China-Guangdong Provincial People's Government Joint Fund [U1601201]
- National Natural Science Foundation of Guangdong Province [2017A030313906]
- Yanling Excellent Young Teacher Program of Lingnan Normal University [YL20200212]
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This article introduces a novel superhydrophobic/superlipophilic brass mesh with excellent physical properties for effectively separating industrial oily wastewater and oil leak. The mesh exhibits high separation efficiency of up to 99.8%, good corrosion resistance, and durability, making it a promising solution for continuous oil/water separation applications.
Effective separation of industrial oily wastewater and oil leak has long been treated as an important link to ensure rapid and harmonious development of economy and society. In this article, a robust superhydrophobic/superlipophilic brass mesh with micro/nano dual-scale structures was successfully fabricated by a fast pulse electrodeposition followed by a two-step simple and nonfluorinated immersion process in alkaline solution of K2S2O8 and 1-Dodecanethiol (NDM) ethanol solution respectively. The as-synthesized novel inorganic membrane not only exhibited an excellent performance for superhydrophobicity (the water contact angle (WCA) of 158 degrees + 1 degrees and the sliding angle (SA) of 2 degrees+ 0.3 degrees) and superoleophilicity (the oil contact angle (OCA) of 0 degrees), but also for anti-corrosion, abrasion resistance and oil/water separation efficiency (up to 99.8%). Especially, it can still maintain high separation efficiency up to 98% after deep abrasion test of 400 cycles, and show no obvious variation for separation efficiency after 50 times reusability. Besides, the prepared mesh possessed an outstanding separation flux capacity both in light and heavy oil/water mixtures, which can reach up to 75 kL.h(-1) m(-2) performed in a self-made gravity self-driven oil-water separation device. By adopting this simple, fast and controllable way, it is expected to save time effectively and may be easily suitable for other conductive metal materials to fabricate new materials for practical continuous oil/water separation.
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