Enhanced Pollution Flashover of a Slurry Coalescence Superhydrophobic Coating

Xu, Wenjie; Niu, Jiaxuan; Tian, Kaiyi; Huang, Zhengyong; Li, Jian; Wang, Feipeng; Wei, Yuan; Zhao, Yushun

doi:10.1109/tdei.2020.009101

Cited by 18 publications

(9 citation statements)

References 25 publications

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“…Normally, artificial hydrophobic surfaces typically involve chemical or textural modification, which has rough structure and low surface energy. , The morphology of the superhydrophobic Si M/N -K-PUa coating was studied by SEM, as shown in Figure g,h. It is clearly observed that the coating consists of microscale protrusions (Figure g) piled up with nanoscale particles (Figure h).…”

Section: Resultsmentioning

confidence: 99%

Robust and Durable Superhydrophobic Coatings with Antipollution Flashover Performance via Silane-Modified Polyurea

Li,

Tan,

Chen

et al. 2024

Langmuir

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The inadequate hydrophobicity and the degradation in usage seriously hampered the applications of the existing antipollution flashover coatings. In this paper, a superhydrophobic polyurea coating with antipollution flashover ability was fabricated through chemically grafting the silica onto the chains of polyurea by utilizing silane coupling agent and hydrophobic modification. It is demonstrated that the coating exhibits outstanding antipollution flashover performances. Noteworthy, the surface pollution flashover voltage has been increased by 33.8% compared with the room temperature vulcanizing silicone rubber (RTV silicone rubber). In addition, the volume resistivity is above 1.0 × 10 12 Ω•m, and the dielectric strength achieves to 28.85 kV/mm, which represents excellent insulating property. Furthermore, the superhydrophobic polyurea coating exhibits outstanding abrasion resistance, adhesion, acid−base resistance, and durability. As a result, it holds great promise for use in preventing pollution flashover in electrical insulators.

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Section: Resultsmentioning

confidence: 99%

Robust and Durable Superhydrophobic Coatings with Antipollution Flashover Performance via Silane-Modified Polyurea

Li,

Tan,

Chen

et al. 2024

Langmuir

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“…As an important parameter to evaluate insulation performance, flashover voltage is not only closely related to the surface charge but also directly related to the dissipation of surface charge and the distribution of surface trap level [24]. The trap distribution of the material could be obtained by measuring the surface potential decay according to the theory of homothermal surface potential decay [25]. Furthermore, the trap energy level distribution could be obtained according to the potential decay theory of the homothermal surface.…”

Section: Resultsmentioning

confidence: 99%

The synergistic effect of micro structure/nanofiller/superhydrophobicity on the surface flashover

Xie

Wang

et al. 2022

High Voltage

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The surface flashover is affected by many factors, such as surface roughness, nanofillers and chemical functional groups. In this research study, polyamide mesh was utilised as a scaffold to systematically study the synergistic effect of micro structure/nanofiller/ superhydrophobicity on the surface flashover. Based on the dissolution and resolidification method, nanofillers were partially embedded into the mesh fabrics. Here, Al 2 O 3 nanoparticles were used as a typical non-conductive nanofiller, and carbon nanotubes were used as a typical conductive nanofiller. Moreover, the micro structure was determined by altering the mesh size, and chemical fluorination was utilised to change the surface chemical group. It was found that the polyamide mesh with 300# demonstrated best anti-flashover properties. Chemical fluorination could effectively improve the flashover voltage. By further adjusting the ratio of Al 2 O 3 to carbon nanotubes, the flashover voltage can be increased by up to 30%.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…However, their long-term exposure to environments with a high content of humidity such as seaward wind power station is prone to flashover due to high hydrophilicity, seriously constricting their applications [3]. Worse still, the wet flashover voltage is lower than the dry flashover one resulting in more hazards [4,5]. As the wet flashover voltage is dependent on surface physio-chemical properties, various methods have been explored for surface modification, such as physical polishing, direct fluorination, and low-temperature plasma material surface treatment [6][7][8].…”

Section: Introductionmentioning

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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Enhanced Pollution Flashover of a Slurry Coalescence Superhydrophobic Coating

Cited by 18 publications

References 25 publications

Robust and Durable Superhydrophobic Coatings with Antipollution Flashover Performance via Silane-Modified Polyurea

Robust and Durable Superhydrophobic Coatings with Antipollution Flashover Performance via Silane-Modified Polyurea

The synergistic effect of micro structure/nanofiller/superhydrophobicity on the surface flashover

Wet flashover voltage improvement of the ceramics with dielectric barrier discharge

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