Abstract
In this study, micro/nanostructures are fabricated on the surface of 3Cr13 stainless steel via laser etching, and a superhydrophobic coating with silver nanoparticles (AgNPs) is prepared by utilizing the reduction-adsorption properties of polydopamine (PDA). We investigate the effect of soaking time from the “one-step method” on the reduction of nano-Ag, surface wettability, and antibacterial properties. Scanning electron microscopy is performed to analyze the distribution of nano-Ag on the surface, whereas X-ray energy dispersive spectroscopy and X-ray photoelectron spectroscopy are used to analyze the crystal structures and chemical compositions of different surfaces. Samples deposited with PDA on their surface are soaked in a 1H,1H,2H,2H-perfluorodecyltriethoxysilane water-alcohol solution containing AgNO3 for 3 h. Subsequently, a “one-step method” is used to prepare low-adhesion superhydrophobic surfaces containing AgNPs. As immersion progresses, more AgNPs are deposited onto the surface. Compared with the polished surface, the samples prepared via the “one-step method” show significant antibacterial properties against both gram-negative Escherichia coli and gram-positive Staphylococcus aureus. The antibacterial properties of the surface improve as immersion progresses.
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Abbreviations
- AgNPs:
-
Silver nanoparticles
- PDA:
-
Polydopamine
- PFDS:
-
1H,1H,2H,2H-perfluorodecyltriethoxysilane
- E. coli :
-
Escherichia coli
- S. aureus :
-
Staphylococcus aureus
- P:
-
Polished surface
- PL:
-
Etched surface
- PLP:
-
Deposited PDA surface
- PLP-S/AgNPs:
-
Superhydrophobic surface containing silver nanoparticles
- N :
-
Number of colonies
- Q :
-
Antibacterial adhesion rate (%)
- WCA:
-
Water contact angle (°)
- SA:
-
Sliding angle (°)
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Acknowledgements
The authors gratefully acknowledge the National Natural Science Foundation of China (52175207) and the National Science and Technology Fund Project of China (2020-JCJQ-JJ-378).
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Ling LAN. He is currently pursuing a master’s degree at China University of Geosciences (Beijing). His main research areas are superhydrophobic materials.
Yue-lan DI. She received her Ph.D. degree in material science and engineering from Academy of Army Armored Forces, China, in 2013 and joined National Defense Key Laboratory of Equipment Remanufacturing Technology, China, from 2014. Her research areas cover the design of structure-function integrated coatings and surface interface friction characteristics.
Hai-dou WANG. He received his Ph.D. degree in the Department of Mechanical Engineering from Tsinghua University, China, in 2003. He joined the National Key Laboratory for Remanufacturing at Academy of Army Armored Forces, China, from then on. He is now a professor and the deputy director of the laboratory. His current research areas cover surface engineering, remanufacturing, and tribology, especially in service life evaluation of surface coatings and solid film lubrication.
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Lan, L., Di, Yl., Wang, Hd. et al. One-step modification method of a superhydrophobic surface for excellent antibacterial capability. Friction 11, 524–537 (2023). https://doi.org/10.1007/s40544-022-0611-z
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DOI: https://doi.org/10.1007/s40544-022-0611-z