Study on the self-cleaning phenomenon and anti-pollution flashover performance of micro-nanostructure superhydrophobic coating surface under a high humidity environment

Chen, Jinyu; Chen, Junwu; Li, Lee; Wang, Shengwu; Xie, Yi

doi:10.1016/j.colsurfa.2021.127552

Cited by 19 publications

(11 citation statements)

References 42 publications

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“…Superhydrophobic coatings have broad prospects and applications in maintaining dryness, self-cleaning, reducing adhesion of liquids, etc. − Compared to traditional superhydrophobic materials manufacturing, superhydrophobic coatings have the advantage of low production cost and large-scale production, , which can be expected to solve the problem of rain attenuation in radomes. Previously, many applications and fabrications of superhydrophobic coatings have been reported. − However, there are few reports on the application of a superhydrophobic coating on the surface of radomes. , Previous studies on the application of a superhydrophobic coating on the radome surface mainly focused on changing the porous structure of the radome itself and the performance of the coating itself, but few studies have focused on the performance of the coating affecting the signal transmission.…”

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confidence: 99%

RETRACTED: Durable Superhydrophobic Coatings Based on Silica Nanoparticles for 5G Radome

Cao,

Zhu,

Huo

et al. 2023

ACS Appl. Nano Mater.

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5G antennas typically operate in outdoor environments. These outdoor factors can reduce antenna accuracy, shorten life, and cause poor operational reliability. Therefore, applying materials with water-repellent properties to the radome can play an important role in protecting them from external environments. This paper reports a superhydrophobic nanocoating that can be sprayed on the radome. The dielectric constant of the coating is 2.709, and the dielectric strength is 38.58 kV/mm. The radome with a superhydrophobic coating was tested by rain, and its signal transmission is only −0.24 dB. Meanwhile, the static contact angle of the coating can reach 157°.

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mentioning

confidence: 99%

RETRACTED: Durable Superhydrophobic Coatings Based on Silica Nanoparticles for 5G Radome

Cao,

Zhu,

Huo

et al. 2023

ACS Appl. Nano Mater.

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“…where μ is the friction coefficient of the material surface, whose value is in the range of 0.2-0.5 and does not differ much from the surface of different hydrophobic materials [35,36]; F r z is the electrostatic force in the vertical direction.…”

Section: Discussionmentioning

confidence: 99%

Wet flashover voltage improvement of the ceramics with dielectric barrier discharge

Huang

Xie²,

Zhou

et al. 2023

Plasma Sci. Technol.

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Surface modification techniques with plasma are widely investigated to improve the surface insulation capability of polymers under dry conditions, while the relationship between treatment method, surface physical and chemical properties, and wet flashover voltage is still unclear for inorganic ceramics. In this paper, the surface insulation properties of ceramics under wet conditions are improved using nanosecond-pulsed dielectric barrier discharge with PDMS as the precursor. The relationships between PDMS concentration and the water contact angle, dry and wet flashover voltages are obtained to acquire the optimal concentration. The surface charge dissipation test and surface physio-chemical property measurement with SEM, AFM, XPS are carried out to further explore the mechanism of surface insulation enhancement. The results show that film deposition with micron thickness and superhydrophobicity occurs at the PDMS concentration of 1.5%. The dry flashover voltage is increased by 9.6% due to the induction of deep traps, while the wet flashover voltage is increased by 66.7%. The gap between dry-wet flashover voltage is decreased by 97.4% compared with the untreated one due to the self-cleaning effect.

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“…Previous studies showed that the overall efficiency of heat exchanger decreased by 50% to 75% with the increase of running time [3]. Recent research results confirmed that the superhydrophobic surface (water contact angle is greater than 150°) had the functions of enhancing heat transfer, frost suppression, self-cleaning and corrosion resistance [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 92%

“…The power consumed by the working fluid pump is (5) The net power output of the ORC system can be determined by a formula (6) The efficiency of the second law of thermodynamics is calculated as…”

Section: System Model Equationsmentioning

confidence: 99%

Study on Delaying Frost Growth Performance of Micro-Nanostructure Superhydrophobic Copper Surfaces

Zhao¹,

Zhang²,

Zhong³

et al. 2022

Pol. J. Environ. Stud.

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In this work, the superhydrophobic surfaces with micro-nano composite structure was successfully prepared by one-step electrodeposition based on Ca-myristic acid complex onto Cu substrate. The performance of delaying frost growth on micro-nanostructure superhydrophobic copper surfaces was explored, and the application of superhydrophobic materials in organic rankine cycle (ORC) was simulated. The experimental results confirmed that the superhydrophobic surfaces increased the nucleation barrier of the condensation droplets, enhanced the heat transfer resistance between the condensation droplets and the cold surface, and effectively restrained frost growth. The simulation study of superhydrophobic materials in organic rankine cycle (SH-ORC) system and ORC system was carried out with Matlab software. It was proved that the net power output and exergic efficiency of SH-ORC system were significantly increased compared with that of ORC system. When the heat source temperature was 180ºC, the net output power of SH-ORC was 15.07% higher than that of ORC, and the exergy efficiency was greater than 14%. The simulation results showed that the most suitable heat source temperature for SH-ORC was 180ºC. Therefore, the superhydrophobic copper surfaces can be potentially used to minimize frost formation in harsh environment.

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Study on the self-cleaning phenomenon and anti-pollution flashover performance of micro-nanostructure superhydrophobic coating surface under a high humidity environment

Cited by 19 publications

References 42 publications

RETRACTED: Durable Superhydrophobic Coatings Based on Silica Nanoparticles for 5G Radome

RETRACTED: Durable Superhydrophobic Coatings Based on Silica Nanoparticles for 5G Radome

Wet flashover voltage improvement of the ceramics with dielectric barrier discharge

Study on Delaying Frost Growth Performance of Micro-Nanostructure Superhydrophobic Copper Surfaces

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