The super-hydrophobic surface has excellent hydrophobicity and self-cleaning properties. In this paper
the super-hydrophobic and hydrophobic silicone rubber surface with the same material were prepared
and the flashover test of polluted surface was designed and then carried out under fog wetting condition. The wetting state of the polluted surface
the dynamic behavior of water droplets and flashover voltage with AC electric field were observed
and the mechanism was investigated. The results show that after being wetted by fog
discrete droplets with a contact angle greater than 90° are formed on the polluted area of the super-hydrophobic surface
and droplets on the non-polluted area of the super-hydrophobic surface are smaller than the hydrophobic surface due to their need for stability. Under AC electric field
the decrease of the dielectric constant of the polluted water droplet leads to the increase of the electric field force
but at the same time the friction increases too
which further affects its dynamic behavior. Most polluted water droplets vibrate and deform
and some very small polluted droplets and clean droplets roll and coalesce. The flashover voltage of the prepared superhydrophobic surface is 58%
109%
108% higher than that of the hydrophobic surface when placed at the angle of 0°
10°
20°. The results are of great significance for the application of super-hydrophobic surface in power equipment.
Run Zhao,Yu Chen,Guozhen Liu,Yucheng Jiang,Kunlin Chen.Fabrication of self-healing waterbased superhydrophobic coatings from POSS modified silica nanoparticles[J].Materials Letters,2018.
Tatsuya Sakoda,Kosei Tabira,Takuma Miyake,Noriyuki Hayashi,Kenich Haji,Yoshiaki Aka,Tomikazu Anjiki,Takato Fukano.Discharge behavior and dielectric performance of artificially polluted hydrophobic silicone rubber[J].Journal of Electrostatics,2018.
Jian Li,Yuan Wei,Zhengyong Huang,Feipeng Wang,Xinzhu Yan,Zhuolin Wu.Electrohydrodynamic behavior of water droplets on a horizontal super hydrophobic surface and its self-cleaning application[J].Applied Surface Science,2017.