The Design And Synthesis Of Novel Nanocomposite FEVE Fluorocarbon Anti-pollution Flashover Hybrid Coating Materials

The pollution flashover accidents threatened the safe operation of the power grid seriously,and affected the normal industrial production and living seriously,which caused huge losses to the national economy.At present,the main anti-pollution flashover measure is coated with anti-pollution flashover coating,among which room temperature vulcanizing silicone rubber(RTV),RTV silicone rubber compound(PRTV)were more extensive used.However,RTV and PRTV coatings have poor mechanical properties,usually only 3?5 years service life and prone to hydrophobicity loss phenomenon after a period of running time,these defects restrict its further application to a great extent.The site operating experience of anti-pollution flashover coating shows that:preventing surface contamination on insulator is the fundamental way to prevent pollution flashover accident,therefore,the development of self-cleaning anti-pollution flashover coating has become a new breakthrough for anti-pollution flashover technology.Fluorocarbon resin(FEVE)not only has excellent physical and chemical properties,but also has low surface energy and hydrophobic and oleophobic properties,outdoor service life above 15 years.Aiming at the existing anti-fouling paints flash short life,poor wear resistance,hydrophobicity loss and other issues of anti-pollution flashover coating,in this paper,FEVE fluorocarbon resin was used as film material,the modified nano-TiO2 and PTFE powders were used as composite function fillers,which successfully prepared a novel nano TiO2/PTFE composite fluorocarbon anti-pollution flashover hybrid coating material with self-cleaning effect.The main contents are:(1)The effect of single functional fillers and composite functional fillers for performances of anti-pollution flashover fluorocarbon coating was studied,and the combination form of composite functional fillers and a suitable pigment to binder ratio were ascertain,which leading to the formation of the micro-nano composite roughness matched with surface chemical composition,reducing its surface energy,and enhancing its hydrophobicity.(2)The modified rutile nano-TiO2/PTFE and modified Degussa nano TiO2/PTFE were used as composite functional fillers,respectively,and the novel nano TiO2/PTFE composite fluorocarbon anti-pollution flashover hybrid coating material with efficient self-cleaning effect was successfully fabricated.Fourier transform infrared spectroscopy(FTIR)was employed to characterize the structure change of nano-TiO2 particles before and after modification.Scanning electron microscope(SEM),X-ray photoelectron spectroscopy(XPS)and contact angle measurement instrument were used to observe and analyze the surface microstructure and hydrophobicity of the coating surface.In addition,the physical and chemical,electrical insulation properties of the coating and self-cleaning function were assessed and evaluated.(3)The nanocomposite fluorocarbon anti-pollution flashover coating was performed with the charged netting run for six months in heavy pollution area in foshan substation,and carried on the measurement of salt,grey guhya and filthy degree test.Finally,further discussion on low surface energy material migration theory and the hydrophobicity persistance mechanism of the modified nano TiO2/PTFE composite fluorocarbon coating was carried out.In this paper,we have done a lot of basic research work based on the research of the novel nanocomposite FEVE fluorocarbon anti-pollution flashover hybrid coating materials,and preliminary completed the charged netting run application of fluorocarbon anti-pollution flashover coating,which has laid a theoretical foundation for our country on developing excellent comprehensive properties of nanocomposite FEVE fluorocarbon anti-pollution flashover coating for our country and its industrialization.