Fabrication of self-cleaning superhydrophobic silicone rubber insulator through laser texturing
TL;DR: In this article, a simple and high throughput way of fabrication of superhydrophoresis is proposed for the transmission and distribution of the power system networks, which can be used for super-hydrophoric super-insulators.
Abstract: Silicone insulators are gaining its importance in the transmission and distribution of the power system networks. This study proposes a simple and high throughput way of fabrication of superhydroph...
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TL;DR: In this article , the authors compared the specific strategies developed to produce super-hydrophobic rubber coatings and analyzed the characteristics and applications of superhydrophilic rubber coating, and applied them on fabric, concrete and asphalt pavement to prevent wetting.
8 citations
TL;DR: In this article, the octadecylamine-modified epoxy resin was sprayed on the surface of carbon fiber/epoxy prepreg and hierarchical micro/nanostructures were formed on the surfaces of the composites through hot pressing.
Abstract: In this study, novel carbon fiber/epoxy (CF/EP) composites with anti-icing properties were made using a combination of octadecylamine modification and hard templating. First, the octadecylamine-modified epoxy resin was sprayed on the surface of CF/EP prepreg. Hierarchical micro/nanostructures were formed on the surfaces of the composites through hot pressing with aluminum templates that had been modified by sandblasting and anodizing. The resulting composites were superhydrophobic, with static contact angles of up to 155° and sliding angles as low as 8°. Superhydrophobicity was maintained after abrading with 400 grit SiC sandpaper. The anti-icing properties of the composites were quantified by measuring droplet freezing time and ice adhesion force. Compared to untreated CF/EP, the surface treatments used here increased the time to freeze a 5 μL surface droplet from 76 to 640 s at − 20 °C, and reduced ice adhesion strength from roughly 74 kPa to 50 kPa.
5 citations
TL;DR: A review of the development and application of super-hydrophobic insulation for outdoor highvoltage applications is presented in this article , where the methods of preparing insulation exhibiting super-rophobic properties to mitigate the pollution problem under high voltages in the outdoors are explored.
Abstract: The aim of this article is to present a review of the development and application of superhydrophobic insulation for outdoor high-voltage applications. The methods of preparing insulation exhibiting superhydrophobic properties to mitigate the pollution problem under high voltages in the outdoors are explored. In addition, the existing evaluation techniques at the material development stage are reviewed and potential new modifications are discussed. The self-cleaning and anti-icing properties, the electrical performance, and prospects of superhydrophobic insulators are also addressed. Although superhydrophobic insulators may show promising behavior in small-scale laboratory conditions that do not use electrical stress, the effect of surface micro–nano structure responsible for the superhydrophobicity on the performance under the actual outdoor and weathering conditions under voltage remains to be fully understood and verified. Therefore, there is a need to verify the feasibility of superhydrophobic insulators for outdoor high-voltage applications with a solid evaluation protocol, while using material screening methods in the laboratory, and with reference to field experience.
4 citations
TL;DR: In this paper , the authors introduce the research progress and current situation of self-cleaning, anti-icing surface preparation, and aging test technology of composite insulators, and look forward to the future development of composite INSulators.
Abstract: Composite insulators are widely used in power systems because of their advantages of light weight, good pollution resistance, and high mechanical strength. With the increasingly serious environmental pollution problem, especially in winter at high latitudes, composite insulators are easily affected by fog, bird droppings, algae, and icing. Long-term exposure to the outdoor insulator surface will cause aging, which will then pose ae potential safety hazard to the stable operation of insulators. Therefore, the self-cleaning, anti-icing, and aging test technologies of composite insulators are particularly important. This paper introduces the research progress and current situation of self-cleaning, anti-icing surface preparation, and aging test technology of composite insulators, and looks forward to the future development of composite insulators.
4 citations
TL;DR: In this article , a comprehensive overview of the performance principles and current application status of functional coatings for overhead transmission lines is provided, and a summary of the key issues in the research of functional coating and gives an outlook on potential future research directions.
Abstract: Overhead transmission line is the main method of power transmission. Conductors, insulators, and towers are the primary electrical equipment of overhead transmission lines. Due to overhead transmission lines work in the natural environment, problems such as icing, corona discharge, contamination deposition, and corrosion will arise. As a result, some accidents may occur, which cause enormous economic losses. The above problems can be solved by coating functional coatings with superhydrophobic, semiconductive, anti-corrosion, and other characteristics on electrical equipment, which has the advantages of low cost and high efficiency. Therefore, functional coatings have become a research hotspot in the field of external insulation in recent years. In view of the various problems of different electrical equipment in overhead transmission lines, distinctive solutions need to be adopted, so this review classifies the coatings according to the usage scenarios and functions. In each category, first briefly outlines the causes of the electrical equipment problem, then introduces the mechanism of using this type of functional coating to solve the problem, next summarizes the development and application status of this type of coating, after summarizes the limitations of this coating, and finally provides a summary of the key issues in the research of functional coatings and gives an outlook on potential future research directions. This review intends to provide readers with a comprehensive overview of the performance principles and current application status of functional coatings for overhead transmission lines.
4 citations
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TL;DR: In this article, carbon nanotubes (CNTs)/SiO2 nano-additives were used to fabricate superhydrophobic coatings for self-cleaning.
Abstract: Styrene–butadiene-styrene triblock copolymers were blended with carbon nanotubes (CNTs)/SiO2 nano-additives to fabricate superhydrophobic coatings for self-cleaning. When the loading of nano-additi...
14 citations
TL;DR: Superhydrophobic (SH) surface has been found effective for drag reduction in wall-bounded turbulence for decades, especially the metallic durable SH surfaces are believed very promising for improvi... as mentioned in this paper.
Abstract: Superhydrophobic (SH) surface has been found effective for drag reduction in wall-bounded turbulence for decades, especially the metallic durable SH surfaces are believed very promising for improvi...
13 citations
TL;DR: In this paper, the cracking and reasons for aging of silicone rubber current transformer insulation sheath from a 500kV substation were investigated, including chemical characteristics including attenuated total reflectan...
Abstract: The cracking and reasons for aging of silicone rubber current transformer insulation sheath from a 500 kV substation were investigated. Chemical characteristics including attenuated total reflectan...
11 citations
14 Feb 2020
TL;DR: In this article, a series of perfluorosilane in situ modified nanosilica particles with different diameters was successfully synthesized and characterized, and the epoxy-based nanocomposite films were prepared by a coa...
Abstract: A series of perfluorosilane in situ modified nanosilica particles with different diameters was successfully synthesized and characterized. The epoxy-based nanocomposite films were prepared by a coa...
11 citations
TL;DR: The superhydrophobic property of the fabricated micro/nano-suction cup structure was successfully found and the dependences of the thickness of the coated-Al and the laser pulse number are discussed.
Abstract: A 193-nm ArF excimer laser was used to induce the photodissociation of Si-O bonds of silicone rubber in order to fabricate a periodic micro/nano-suction cup silicone structure, approximately 1 μm in diameter and 2 μm in height at regular intervals of 2.5 μm. The laser was focused on Al-coated silicone rubber by each silica glass microsphere 2.5 μm in diameter, which covered the entire surface of the silicone rubber. The silicone rubber underneath each microsphere photochemically swelled after laser-ablating the coated Al to limit the diameter of the swelling. Simultaneously, the coated Al was able to adjust the focal point to the surface of the silicone rubber to form a hole approximately 500 nm in diameter, centered at the swollen silicone. The dependences of the thickness of the coated-Al and the laser pulse number are discussed, based on the observations of a scanning electron microscope (SEM) and an atomic force microscope (AFM). The superhydrophobic property of the fabricated micro/nano-suction cup structure was successfully found.
10 citations