Enhanced DC Insulation Strength of PMIA Paper by CF4/Ar Plasma Treatment

The objective of this article is to enhance the dc insulation strength of poly- ${m}$ -phenylene isophthalamide (PMIA) paper by surface treatment. CF ₄ /Ar plasma is used to modify the surface of PMIA paper by fluorination, and the effects of fluorination on the microstructure, electrical parameters, and insulation properties of the material are investigated, and the optimized treatment parameters of CF ₄ concentration and treatment time are obtained, and the mechanism is further explained from the perspective of carrier traps. The results show that the moderate CF ₄ /Ar plasma treatment can improve the surface insulation properties of PMIA paper without damaging its overall insulation properties.