Study On Preparation And Anti-icing Durability Of Superhydrophobic Films On Glass Surface

Insulator is an important part of transmission line.Icing on the surface of glass insulator can easily cause serious accidents such as tower collapse,conductor galloping,breakage and insulator flashover,etc.This will seriously affect the safe operation of power system.Therefore,the research of the novel ice prevention and deicing technology for transmission lines has important engineering value and academic significance.A method of fabricating the superhydrophobic（SHP）anti-icing material based on RF magnetron sputtering is studied in this work,and the influence of preparation parameters and microstructure on the wettability of the SHP surface is explored.Then,the electrical properties of the SHP films with excellent hydrophobicity are tested.Finally,the applicational conditions of anti-icing are explored,and the anti-icing durablility performance of SHP surfaces is also studied.The main contents of the paper are as follows:（1）The Al₂O₃-ZnO SHP surface with nanorod-like structure was prepared by radio frequency magnetron sputtering,and the influence of preparation process on the micro-structure and crystallization process of the SHP surface was explored in details.Four SHP Al₂O₃-ZnO surfaces with the same micro-structure and different surface elements were designed and prepared.The physical and chemical parameters of the four surfaces,such as roughness,wettability and surface element composition,were tested.In addition,the surface resistivity of the SHP film was tested,and the surface flashover voltage experimental platform was designed to explore the electrical performance of the SHP film under uniform electric field.（2）Water droplets static freezing,rain glaze anti-icing and anti-frosting performance on the SHP surface under different conditions were systematically studied.Firstly,the water static freezing test platform was built to conduct a detailed research of delay time and starting temperature of the freezing process of the water droplets on the SHP surface under under different environmental conditions.It was found that the the freezing process of water droplets on the semiconductor platform can be divided into two stages,the first stage is that the freezing was firstly formed on the solid/liquid/gas interface,followed by a rapid growth of development to the droplets’surface,and gradually led to the formation of the solid-liquid mixture;in the second stage,the water droplet was completely frozen at the solid-liquid contact area from the bottom to the top.Then,the multi-function artificial climate laboratory was utilized to study the icing process of the SHP Al₂O₃-ZnO surface at different temperatures and different angles.And the ice morphology,ice area and ice weight were also tested under the different conditions,and the anti-icing applicable conditions of the SHP surface was determined.Finally,the frosting test platform was set up to explore the anti-frosting performance and evolution law of the SHP surface under different temperatures.（3）Study on the anti-icing durability performance of the SHP Al₂O₃-ZnO surface was done,which systematically explored the hydrophobic stability and anti-icing performance of different temperatures,long-term outdoor exposure experiments,3.5wt%NaCl heating corrosion and simulated acid rain corrosion on the SHP Al₂O₃-ZnO surface compared with the untreated samples,and further analyzed the causes of the deterioration of its anti-icing performance.