Atmospheric air and liquid-film DBD plasma using sine AC excitations for purpose of improving the hydrophilicity of PTFE

Xu, Qingnan; Wang, Hongli; Liang, Jianping; Zhang, Yan; Yang, Dezheng

doi:10.1016/j.vacuum.2022.111688

Cited by 6 publications

(4 citation statements)

References 38 publications

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“…Fast gas heating in plasma is mainly by the dissociation of oxygen molecules produced by electron collisions, the quenching of excited nitrogen (N 2 (B 3 Π g -C 3 Π u )) by oxygen molecules, and O( 1 D) by nitrogen molecules [37]. The emission spectrum of nitrogen mentioned is mainly composed of the second positive band of nitrogen molecule N 2 (C-B, 315.7 nm, 337.1 nm, 357.5 nm, 380.4 nm) [38][39][40][41]. To further analyze the relationship between the temperature distribution characteristics and distribution of plasma particles, emission spectra in the range of 30-0-450 nm are collected in the conditions of the power frequency at 1 kHz and the voltage at 7 kV.…”

Section: Optical Propertiesmentioning

confidence: 99%

Plasma characteristics and de-icing of three-electrode double-sided pulsed surface dielectric barrier discharge

Wang,

Peng,

Jiang

et al. 2024

J. Phys. D: Appl. Phys.

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Ice accumulation on aircraft can lead to aerodynamic performance degradation and even trigger security incidents. However, traditional SDBD reactors can't work while covered by glaze ice. In the present work, a novel three-electrode double-sided SDBD is proposed and employed for glaze ice deicing. Compared with traditional SDBD reactor, three-electrode double-sided SDBD introduces an additional discharge area and grounding electrode. On one hand, the heat generated in the additional discharge area can melt the glaze ice covered on the high-voltage electrode, providing a discharge gap for the subsequent discharge. On the other hand, the introduction of the additional grounding electrode can also dramatically enhance the upper discharge and thermal effect. As a result, compared with the three-electrode single-sided SDBD and two-electrode double-sided SDBD, the three-electrode double-sided SDBD has the highest deposited energy, maximal temperature, and deicing rate. To further optimize the structural design, the effect of air gap length below the dielectric on three-electrode double-sided SDBD is investigated. And it is found that the best deicing performance can be obtained at the air gap length of 1 mm.

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Section: Optical Propertiesmentioning

confidence: 99%

Plasma characteristics and de-icing of three-electrode double-sided pulsed surface dielectric barrier discharge

Wang,

Peng,

Jiang

et al. 2024

J. Phys. D: Appl. Phys.

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“…In the case of PET, increasing the plasma gas temperature promotes the surface activation energy, although a threshold of 70 • C is recommended [144]. Taking this into account, wettability properties can be improved with WCA values falling from 65 • to 45 • only when increasing temperature from 35 • C to 70 • C. Finely controlling and reducing gas temperature can also be achieved by innovating specialized plasma sources such as liquid-film dielectric barrier devices (LF-DBD) [145]. Comparing LF-DBDs and conventional DBDs, which operate at 180 • C and 300 • C, respectively, under similar experimental conditions, PTFE samples exposed to LF-DVDs show less surface damage, higher concentrations of nitrogen-and oxygen-containing functional groups and WCA values as low as 65 • .…”

Section: Substrate Temperaturementioning

confidence: 99%

From Basics to Frontiers: A Comprehensive Review of Plasma-Modified and Plasma-Synthesized Polymer Films

Dufour

2023

Polymers

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This comprehensive review begins by tracing the historical development and progress of cold plasma technology as an innovative approach to polymer engineering. The study emphasizes the versatility of cold plasma derived from a variety of sources including low-pressure glow discharges (e.g., radiofrequency capacitively coupled plasmas) and atmospheric pressure plasmas (e.g., dielectric barrier devices, piezoelectric plasmas). It critically examines key operational parameters such as reduced electric field, pressure, discharge type, gas type and flow rate, substrate temperature, gap, and how these variables affect the properties of the synthesized or modified polymers. This review also discusses the application of cold plasma in polymer surface modification, underscoring how changes in surface properties (e.g., wettability, adhesion, biocompatibility) can be achieved by controlling various surface processes (etching, roughening, crosslinking, functionalization, crystallinity). A detailed examination of Plasma-Enhanced Chemical Vapor Deposition (PECVD) reveals its efficacy in producing thin polymeric films from an array of precursors. Yasuda’s models, Rapid Step-Growth Polymerization (RSGP) and Competitive Ablation Polymerization (CAP), are explained as fundamental mechanisms underpinning plasma-assisted deposition and polymerization processes. Then, the wide array of applications of cold plasma technology is explored, from the biomedical field, where it is used in creating smart drug delivery systems and biodegradable polymer implants, to its role in enhancing the performance of membrane-based filtration systems crucial for water purification, gas separation, and energy production. It investigates the potential for improving the properties of bioplastics and the exciting prospects for developing self-healing materials using this technology.

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“…Dielectric barrier discharges (DBDs) are well known for ozone generation, surface modification, as a light source, in ammonia synthesis, plasma display panels and so on [1][2][3][4][5][6]. In recent years, there has been much evidence that the DBD system is an excellent vehicle for studying pattern formation.…”

Section: Introductionmentioning

confidence: 99%

Formation mechanism of bright and dark concentric-ring pattern in dielectric barrier discharge

LI 李,

FENG 冯,

WANG 王

et al. 2024

Plasma Sci. Technol.

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In this work, a bright and dark concentric-ring pattern is reported in the dielectric barrier discharge for the first time. The spatiotemporal dynamics of the bright and dark concentric-ring pattern is investigated by an intensified charge-coupled device and photomultiplier tubes. The results indicate that the bright and dark concentric-ring pattern is composed of three concentric-ring sub-lattices. They are bright concentric-ring structures, dark concentric-ring structures and wider concentric-ring structures, respectively. The bright concentric-ring structures and dark concentric-ring structures are alternately distributed. The bright concentric-ring structures are located at the centre of the wider concentric-ring structures. The formation of the wider concentric-ring structures is first formed from the outer edge and gradually develops to the centre. The essence of all three concentric-ring structures is the individual discharge filaments. The optical emission spectra of different sub-lattices are acquired and analyzed. It is found that the plasma parameters of the three concentric-ring sub-lattices are different. Finally, the formation mechanism of the bright and dark concentric-ring pattern is discussed.

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Atmospheric air and liquid-film DBD plasma using sine AC excitations for purpose of improving the hydrophilicity of PTFE

Cited by 6 publications

References 38 publications

Plasma characteristics and de-icing of three-electrode double-sided pulsed surface dielectric barrier discharge

Plasma characteristics and de-icing of three-electrode double-sided pulsed surface dielectric barrier discharge

From Basics to Frontiers: A Comprehensive Review of Plasma-Modified and Plasma-Synthesized Polymer Films

Formation mechanism of bright and dark concentric-ring pattern in dielectric barrier discharge

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