Study On The Anti-ice And Anti-corrosion Performance Of Candle Soot On Insulators

Icing of transmission line insulator string will cause the total weight of insulator string to increase,resulting in exceeding the mechanical strength of conductor and tower,causing damage to the overall structure of overhead transmission line,which in severe cases may cause insulator flashover,eventually leading to discharge breakdown and loss of insulation performance.Therefore,it is important to solve the phenomenon of ice cover on transmission lines/electrical equipment for the development of power systems and the safety and economy of operation and maintenance.In this paper,we analyze the relevant anti-icing and de-icing technologies and conclude that superhydrophobic anti-icing coating is the most promising anti-icing method at present.The wettability of superhydrophobic coatings,the type of ice coverage on insulator surfaces,and the mechanism of ice coverage are analyzed,the method of preparing superhydrophobic coatings is studied,and the materials commonly used for preparation are summarized.The technique of preparing superhydrophobic anti-icing coating by using candle soot as a template is adopted,and the formation mechanism is thoroughly analyzed,and the comprehensive performance of the superhydrophobic anti-icing coating is summarized.Finally,the superhydrophobic anti-icing coating is successfully applied to glass insulators through experiments,which further illustrates the application prospects of the superhydrophobic antiicing coating on outdoor transmission lines/electric equipment.The main innovations achieved in this paper and their technical features are:(1)PDMS(O)/HDTMS superhydrophobic coating was prepared on the surface of ordinary slides by template method,using PDMS as a binder and candle soot as a special material to help build the rough structure,which greatly simplified the preparation process and made the variables and their influencing factors become smaller,and high-temperature calcination was used to remove the candle soot to obtain transparent surface,Finally,the transparent superhydrophobic coating surface with Cassie-Baxter state was successfully prepared by introducing hydrophobic groups such as methyl and methylene groups by spraying HDTMS solution to reduce the surface energy,and the microstructure was a porous thick network chain structure with a hydrophobic angle of 163° and a rolling angle of less than 1°.(2)The anti-icing performance of PDMS(O)/HDTMS superhydrophobic coatings was investigated by reviewing a large amount of literature,which concluded that specific superhydrophobic surfaces are required to have anti-icing performance.The results show that the superhydrophobic coating significantly delayed the icing time compared to the normal sliding surface.In addition,both parts of the experiments were also tested by repeated actions as well as ice bead adhesion on the coated surface using a spin coater.The results showed that after 120 repetitions of the icing/deicing test,the superhydrophobic coating still had a significant porous network structure,and the hydrophobic and rolling angles remained above150° and below 10°.On the one hand,it is believed that it is the stable Cassie-Baxter state of the substrate that gives the superhydrophobic coating its excellent anti-icing properties,and that the anti-icing effect of the coating is significantly better than that of superhydrophobic surfaces made of similar materials.On the other hand,the coating has certain electrical properties that not only do not affect the electrical properties of the substrate itself,but also positively contribute to the related properties.This is a feature that is not present in the coatings prepared with candle soot materials.(3)In this paper,the superhydrophobic anti-icing coating was successfully prepared on the surface of glass insulators,and the insulator surface application study was conducted by comparing the water droplet impact and icing morphology of the ordinary glass insulator surface and the surface coated with the superhydrophobic anti-icing coating.The anti-icing mechanism of the superhydrophobic anti-icing coating is also explained at two levels in conjunction with the theoretical study.