Study On Preparation And Electrical Properties Of Epoxy Nanocomposite

With the rapid development of China's industry,China's social power consumption has further increased,but due to its own geographical factors and development factors,the cost of building thermal power plants in the industrially developed eastern region is very high.Therefore,China has adopted strategies such as power transmission from the west to the east to transmit power from the west to the east,and uses high-voltage power transmission lines on the way to reduce losses during transmission.In recent years,a closed electric line supporting insulation and air chamber isolation has been increasingly favored due to its large transmission capacity,high safety,environmental friendliness,and wide variety of applications.In the actual application of GIL,there are several key technologies that limit the large-scale application of GIL transmission lines in actual production.One of them is the insulation characteristics of GIL insulators,and the most critical part is GIL.Insulation characteristics of basin insulators.Because of its excellent electrical properties and ease of processing,GIL pot insulators are made of epoxy resin.Therefore,improving the charge dissipation performance of epoxy resin has become a key factor to improve the stability of insulators in GIL.In order to improve the charge dissipation performance and insulation performance of epoxy insulators for GIL,in this experiment,boron nitride(BN)was added to the epoxy resin;polydopamine modified boron nitride(BN-PDA);modified Boron nitride nanosheets(f-BNNS);barium titanate(BaTiO3);polydopamine-encapsulated barium titanate(BaTiO3-PDA)as filler in the preparation of epoxy resin composites with different fillers,and analysis of the microstructure of the composites,thermal properties Tests,infrared tests,dielectric performance tests,surface charge dissipation properties and other electrical performance tests found that proper modification of nanofillers can effectively improve the electrical insulation properties and charge dissipation properties of epoxy resins,where f is added to the epoxy resin.f-BNNS and BaTiO3-PDA fillers change the unmodified BN and BaTiO3 materials,while improving the dispersion in epoxy resin,it can greatly promote the charge dissipation rate and breakdown field strength of the composite materials.When the mass fraction is 1wt%,the breakdown field strength of f-BNNS is increased by 11%,the charge dissipation rate is increased by 123%,compared with 1wt%of the BN filler,the charge dissipation rate is increased by 1500%,and the BaTiO3-PDA filler is increased by 1wt%.As a result,the breakdown field strength of the composite material increased by 16%,and the charge dissipation rate increased by 89.3%.Compared with 1wt%BaTiO3 filler,the charge dissipation rate is increased by 3900%.Both materials have the potential to be used in the field of epoxy resin electrical insulation and electronic packaging.