Superhydrophobic coating with abrasion resistance and preparation method thereof

A method for preparing a superhydrophobic coating with abrasion resistance, comprising the following steps:

• (1) modifying multi-walled carbon nanotubes to obtain multi-walled carbon nanotubes with amino groups on a surface thereof, modifying nano-SiO2 to obtain nano-SiO2 with epoxy groups on a surface thereof, and mixing the multi-walled carbon nanotubes with amino groups on the surface thereof and the nano-SiO2 with epoxy groups on the surface thereof in acetone, to prepare nanohybrid composed of the nano-SiO2 and the multi-walled carbon nanotubes;
• (2) uniformly dispersing the nanohybrid prepared in step (1) in acetone, and then uniformly mixing with a resin to form a homogeneous liquid, which is a hybrid-resin composite solution;
• and
• (3) uniformly spraying the hybrid-resin composite solution on a surface of a substrate, and curing at a temperature of 40-80° C. for 12-24 h to obtain the superhydrophobic coating with abrasion resistance;
• wherein the superhydrophobic coating with abrasion resistance has a composite structure formed by the nanohybrid composed of the nano-SiO2 and the multi-walled carbon nanotubes, and the resin as a matrix;
• and
• wherein in step (1), mixing the multi-walled carbon nanotubes with amino groups on the surface thereof and the nano-SiO2 with epoxy groups on the surface thereof in acetone is conducted by magnetic stirring for 64-80 h with a mass ratio of the multi-walled carbon nanotubes to the nano-SiO2 ranging from 1:1 to 5:1, to obtain the nanohybrid composed of the nano-SiO2 and the multi-walled carbon nanotubes.