LAUSR

Because of the versatility of superhydrophobic materials, it has been attracted a lot of attention even in power electronics, transportation, engineering and other fields. The volume fraction of fluorinated silicon oxide nanoparticles in superhydrophobic materials is one most important factor. Increasing the volume fraction would decrease the stability between the coating and the hydrophobic surface. Especially, the flashover voltage of the coating gradually decreases from 10 vol.% to 35 vol.%. Meanwhile, the flashover voltage dispersion of the coating increases drastically after 30 vol.%. In order to improve the electrical properties of the superhydrophobic coating, self-assembly of surface energy differences strategy was proposed in this article. A binary filling phase of the coating was introduced by two-dimensional boron nitride nanosheets and silicon oxide nanoparticles. Although Hexagonal boron nitride with high surface energy and low roughness, it will be spontaneously assembled and wrapped by silicon oxide nanoparticle based on surface energy differences, which forming a low surface energy filled phase. Experiment results proved that the flashover voltage of the superhydrophobic coating was optimized by the binary filling phase coating. This method offers new ideas for the selection of filling phase and application of superhydrophobic materials. This article is protected by copyright. All rights reserved.