A Review on Superhydrophobic Surface with Anti-Icing Properties in Overhead Transmission Lines

Abstract

The icing on overhead transmission lines is one of the largest threats to the safe operation of electric power systems. Compared with other security accidents in the electric industry, a sudden ice disaster could cause the most serious losses to electric power grids. Among the numerous de-icing and anti-icing techniques for application, direct current ice-melting and mechanical de-icing schemes require power cuts and other restrictive conditions. Superhydrophobic coating technology has been widely focused for good anti-icing properties, low cost and wide application range. However, the special structure of curved transmission lines, complicated service environments, and variated electric performance could significantly limit the application of superhydrophobic anti-icing coatings on overhead transmission lines. In particular, superhydrophobic surfaces can be achieved by combining the rough micro-nano structure and modification agents with low surface energy. Compared with superhydrophobic coatings, superhydrophobic surfaces will not increase the weight of the substrate and have good durability and stability in maintaining the robust structure to repeatedly resist aging, abrasion, corrosion and corona damages, etc. Therefore, this review summarizes the theoretical basis of anti-icing behavior and mechanisms, influencing factors of anti-icing properties, potential techniques of superhydrophobic surfaces on transmission lines, and, finally, presents future development challenges and prospects of superhydrophobic surfaces in the anti-icing protection of overhead transmission lines.

Biomimetic Superhydrophobic Materials through 3D Printing: Progress and Challenges

“…In consequence, numerous kinds of strategies have been proposed over recent years for the development of anti-icing and de-icing systems [ 144 ]. Among these, biomimetic superhydrophobic surfaces (SHSs) inspired by the “lotus leaf effect” and slippery liquid-infused porous surfaces (SLIPSs) inspired by Nepenthes have shown great potential in anti-icing applications [ 158 , 159 ] ( Figure 14 a). The mechanism of anti-icing SHSs and SLIPSs can be summarized as follows: (1) before icing, water can be removed directly due to the superhydrophobicity of the surfaces.…”

Rime as a Relevant Part of Atmospheric Deposition in Mountain Regions

“…Kromě fyzikálních vlastností se článek věnuje i chemickému složení námrazy a poukazuje na to, do jaké míry se může námraza podílet na atmosférické depozici látek a jak významnou roli v tomto ohledu hraje zejména lokálně v horském prostředí. Klíčová slova: námraza, atmosféra, atmosférická depozice, znečištění ovzduší V našich klimatických podmínkách je námraza nebezpečným atmosférickým jevem představujícím významný problém pro dopravu silniční i leteckou [10][11][12] , způsobující svou vahou kalamity v rozvodných energetických sítích 13,14 či lámání stromů. Energetika má u nás k dispozici výsledky pozorování výskytu námrazy od třicátých let dvacátého století a jde o nejdelší záznamy v celosvětovém měřítku 4,[15][16][17][18] .…”

Dependence of Slippery and Elastic Properties of Thin Polymer Films on the Grafted Flexible Sidechain Amount

“…One of the perspective areas in the field of material science is creating slippery coatings, i.e., coatings with low contact angle hysteresis (CAH), Δθ = θ adv – θ rec , where θ rec and θ adv are advancing and receding contact angles of the droplet that begins to slide down a minimally inclined treated surface. The creation of robust, slippery omniphobic coatings repelling any liquids from water to oils or even solids would help to solve a great number of practical problems when adhesion is undesirable: wetting and contamination of different surfaces, sticking of the contents to the packaging, biofouling of medical devices, marine fouling, fluid dynamics, etc. − Solid, liquid, or vapor accretion control for such coatings opens up possibilities for applications, like enhancing phase-change heat transport, fog harvesting, anti-icing/anti-frosting/ice-shedding properties, self-cleaning windows, anti-corrosion, drag reduction, separation of liquids, and so on. − Slippery coatings have been found to have a wide range of applications in various fields such as medicine, manufacturing, and aerospace. − In recent years, there has been a significant increase in research efforts focused on the development and application of these coatings. Biomimetic strategies as well as the progress in nanotechnologies have stimulated the appearance of novel approaches to the creation of slippery coatings since the 1990s. − Nowadays approaches to creation of such surfaces mainly include air-trapped superhydrophobic, superoleophobic surfaces, and slippery lubricant-infused porous surfaces (SLIPSs) …”