Preparation and study of low surface energy epoxy resin superhydrophobic coatings
The complex preparation process and poor durability of surface roughness structure restrict the large-scale application of superhydrophobic coatings in reality.In this study,a low surface energy epoxy resin SAEP was prepared by grafting octadecanoic acid onto cyclohexanediamine tetrafunctional epoxy resin(AG602).The SAEP was mixed with hydrophobic nano silica particles and coated.The properties of the coating after thermal curing were investigated.The results showed that when the nmSiO2 content was 30 wt％,the coating surface exhibited superhydrophobicity,with a water contact angle of 156.5 ° and a rolling angle of 5.1 °.The coating could still maintain superhydrophobicity after being subjected to 45 cycles of sandpaper polishing.In addition,the coating also had excellent self-cleaning ability and acid alkali corrosion resistance.
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