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Open AccessArticle

Effects of Surface Microstructures on Superhydrophobic Properties and Oil-Water Separation Efficiency

1
Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang’an University, Xi’an 710054, China
2
School of Environmental Science and Engineering, Chang’an University, Xi’an 710054, Shaanxi, China
3
Dooge Centre for Water Resource Research, School of Civil Engineering, University College Dublin, Belfield, Dublin 4, Ireland
*
Author to whom correspondence should be addressed.
Coatings 2019, 9(2), 69; https://doi.org/10.3390/coatings9020069
Received: 16 December 2018 / Revised: 17 January 2019 / Accepted: 22 January 2019 / Published: 24 January 2019
(This article belongs to the Special Issue Superhydrophobic Coatings for Corrosion and Tribology)
In order to explore the effects of microstructures of membranes on superhydrophobic properties, it is critical, though, challenging, to study microstructures with different morphologies. In this work, a combination of chemical etching and oxidation was used and some copper meshes were selected for grinding. Two superhydrophobic morphologies could be successfully prepared for oil-water separation: a parabolic morphology and a truncated cone morphology. The surface morphology, chemical composition, and wettability were characterized. The results indicated that the water contact angle and the advancing and receding contact angles of the parabolic morphology were 153.6°, 154.6° ± 1.1°, and 151.5° ± 1.8°, respectively. The water contact angle and the advancing and receding contact angles of the truncated cone morphology were 121.8°, 122.7° ± 1.6°, and 119.6° ± 2.7°, respectively. The separation efficiency of the parabolic morphology for different oil-water mixtures was 97.5%, 97.2%, and 91%. The separation efficiency of the truncated cone morphology was 93.2%, 92%, and 89%. In addition, the values of the deepest heights of pressure resistance of the parabolic and truncated cone morphologies were 21.4 cm of water and 19.6 cm of water, respectively. This shows that the parabolic morphology had good separation efficiency, pressure resistance, and superhydrophobic ability compared with the truncated cone morphology. It illustrates that microstructure is one of the main factors affecting superhydrophobic properties. View Full-Text
Keywords: superhydrophobic materials; rough morphology; parabolic morphology; truncated cone morphology; oil-water separation superhydrophobic materials; rough morphology; parabolic morphology; truncated cone morphology; oil-water separation
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MDPI and ACS Style

Chen, Y.; Yang, S.; Zhang, Q.; Zhang, D.; Yang, C.; Wang, Z.; Wang, R.; Song, R.; Wang, W.; Zhao, Y. Effects of Surface Microstructures on Superhydrophobic Properties and Oil-Water Separation Efficiency. Coatings 2019, 9, 69. https://doi.org/10.3390/coatings9020069

AMA Style

Chen Y, Yang S, Zhang Q, Zhang D, Yang C, Wang Z, Wang R, Song R, Wang W, Zhao Y. Effects of Surface Microstructures on Superhydrophobic Properties and Oil-Water Separation Efficiency. Coatings. 2019; 9(2):69. https://doi.org/10.3390/coatings9020069

Chicago/Turabian Style

Chen, Yangyang; Yang, Shengke; Zhang, Qian; Zhang, Dan; Yang, Chunyan; Wang, Zongzhou; Wang, Runze; Song, Rong; Wang, Wenke; Zhao, Yaqian. 2019. "Effects of Surface Microstructures on Superhydrophobic Properties and Oil-Water Separation Efficiency" Coatings 9, no. 2: 69. https://doi.org/10.3390/coatings9020069

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