期刊
PLASMA PROCESSES AND POLYMERS
卷 18, 期 12, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ppap.202100045
关键词
nanoparticle nucleation; plasma polymerization; pulsed DBD; RF DBD; superhydrophobic surface
资金
- International Cooperation and Exchange of the National Natural Science Foundation of China [52111530088]
- Construction Committee project of Chongqing [20181-3-6]
- Fundamental Research Funds for the Central Universities [2019CDQYDQ034]
- Technology Innovation and Application Development Project of Chongqing [cstc2019jscxmsxmX0041]
- National Natural Science Foundation of China [52111530088, 11975061, 52077185]
- Basic Research Program of Science and Technology of Shenzhen [JCYJ20190809162617137]
- Vlaio [HBC.2019.0157]
A novel sandwich-like plasma device is proposed in this study for engineering superhydrophobic (SH) surfaces, utilizing the coordination of dual power sources to control surface hydrophobicity. The two-stage dielectric barrier discharges (DBDs) achieve easy ignition and enhanced stability, as well as fragmentation and dispersion of species and nanoparticles for SH surface fabrication. This study provides insights on a new pathway based on plasma-assisted method for surface engineering and material processing at atmospheric pressure.
Superhydrophobic (SH) surfaces have great potential in numerous applications. Plasma polymerization is one of the most efficient technologies for engineering SH surfaces due to its unique feature of tailoring surface chemistry and surface topography simultaneously. Herein, a novel sandwich-like plasma device that consists of contiguous two-stage dielectric barrier discharges (DBDs) driven by the time-modulated radiofrequency (RF) and pulsed power sources is proposed to polymerize hexamethyldisilazane (HMDSN) at atmospheric pressure for the purpose of SH surface engineering. The coordination of dual power sources shows effective performances in plasma operation and material surface treatment, compared to the case driven by any power source alone. Easy ignition and enhanced stability are achievable for the upper RF DBD with the assistance of the bottom pulsed DBD. Vice versa, a diffuser pulsed discharge is obtainable with the input of abundant active and energetic species and precursor fragments from the upper RF plasma. Diagnostic measurements by optical emission spectroscopy and Mie scattering demonstrate that HMDSN fragmentation and nanoparticle nucleation are initiated predominantly by the RF-driven plasma. These species and nanoparticles are further fragmented and dispersed in the bottom pulsed discharge. Consequently, the desired SH surface is fabricated with a similar pattern to that of the pulsed DBD geometry. This study provides a new pathway based on the plasma-assisted method to control surface hydrophobicity and provides insights on a new plasma deposition method suitable for atmospheric pressure material processing.
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