Silica modified by SiO₂/silicone fluoroethylene acrylate emulsion superhydrophobic coating for electromagnetic wire study on the properties of the composite insulating layer

Abstract In this paper, a silicone-containing fluoroethylene acrylate emulsion was synthesized through emulsion polymerization, and a superhydrophobic coating was prepared by compounding it with modified SiO 2 particles. The micromorphology, composition, and hydrophobic properties of the coating surface were analyzed using scanning electron microscopy, Fourier-transform infrared spectroscopy, x-ray diffraction, x-ray photoelectron spectroscopy, and water contact angle tests. The results revealed the presence of numerous micro-nanostructures on the coating surface, with a water contact angle of 161 ± 0.5°, indicating the characteristics of a superhydrophobic coating. A superhydrophobic composite insulating layer was created by modifying the quartz fiber insulating layer of electromagnetic wire with the superhydrophobic coating. The quartz fiber-insulated electromagnetic wire, treated with moisture, was evaluated for its insulation and breakdown voltage performance. The findings demonstrate that the superhydrophobic coating significantly reduces moisture absorption in quartz fiber, and the electromagnetic wire, even after moisture treatment, maintains excellent insulation and high breakdown strength, indicating promising applications in the field of electromagnetic wire insulation materials.