Preparation Of Superhydrophobic Materials By Multi-fluorination And Their Application In Power Grid Protection

The use of a large number of metal materials in the power system will inevitably occur corrosion damage in the atmosphere or soil environment,which will endanger the safe and stable operation of the power grid.Therefore,metal corrosion prevention has become an important research direction.Due to its high contact angle,low rolling angle and self-cleaning properties,superhydrophobic surface has broad application prospects in oil-water separation,droplet non-destructive transportation,surface protection and other fields.The combination of superhydrophobic and metal anticorrosive coatings can effectively improve the corrosion resistance of coatings,and researchers in the field of anticorrosion pay more and more attention to it.However,the durability of superhydrophobic coatings has always hindered the practical application of superhydrophobic coatings.How to improve the durability of superhydrophobic coatings and develop superhydrophobic application scenarios has become the focus of superhydrophobic researchers.Based on the basic principle of superhydrophobicity,polydimethylsiloxane(PDMS)was fluorinated by using heptafluorobutyric acid and perfluoropolyether fluoride compounds to reduce its surface energy,and superhydrophobic coating materials were prepared by embedding multi-walled carbon nanotubes on PDMS basis.The surface morphology and functional groups were observed by SEM and FTIR,and the hydrophobic mechanism was explained.The superhydrophobicity of the coating was studied,and the contact angle was as high as 160°,the rolling angle was less than 5°,and the coating had good self-cleaning performance.The durability of the coating was evaluated.The maximum tensile rate of the coating was 216%,and the friction distance was 16 meters without lossing superhydrophobicity under 8k Pa pressure.The coating showed good chemical stability and thermal stability.The coating has excellent water impact and liquid impalement resistance performance,and maintain superhydrophobic performance under the impact of 0.5 MPa water flow.The electrochemical corrosion protection performance of the coating was evaluated by electrochemical workstation under different acid-base corrosion environments.The electrochemical corrosion protection performance of the coating was evaluated under different p H corrosion environments by using electrochemical workstation.When the anticorrosive coating was faced with hydrochloric acid solution with p H of 1,the self-corrosion current density was Icorr=10e^-7.8A/cm²,and the coating showed excellent chemical corrosion resistance.In order to conform to the trend of intelligent power grid,based on the tensile properties of coating materials,this paper innovatively developed the application of materials in sensor-based protective coatings.Superhydrophobicity endows the sensor with self-cleaning protection function and enhances its durability.The sensitivity of strain resistance change of the sample GF=11.41 was tested,and the detection of strain in the action of simulated human joints was tested.It performs well in the action detection test of human joints,and effectively detects and identifies different joint actions,indicating that the sensor-based protective coating has a certain strain detection ability,which can provide protection for smart grid equipment and real-time state monitoring of equipment.