Large-scale fabrication of a durable and self-healing super-hydrophobic coating with high thermal stability and long-term corrosion resistance

Durability is a crucial feature to expand the application field of artificial superhydrophobic coatings. Herein, a kind of durable superhydrophobic coating is prepared by a simple and cheap method using a fluorine-free suspension as the raw material, which consists of epoxy modified silicone resin (MSR), functionalized SiO2, GO, and lamellar mica powder (MP). The MSR@SiO2 + GO + MP coating shows outstanding surface wettability with a water contact angle of 163.8 degrees, a low sliding angle of 3.5 degrees and the microdroplet adhesive force of about 12.6 +/- 0.5 mu N. Furthermore, it can withstand alternating high and low temperatures, intense UV radiation for 7 days, strong chemical attack, and various mechanical durability tests. In addition, the coating also exhibits a significantly repairable ability to resist O-2 plasma etching, and outstanding self-cleaning both in air and oil even after mechanical damage. The mechanism for the influence of the multiple hybridizations on the long-term corrosion stability and thermal-related properties of the superhydrophobic coating is further systematically studied. The simple method and superhydrophobic coating should have good application prospects in large area protection.

Automated summary

A durable superhydrophobic coating was prepared using a fluorine-free suspension, exhibiting outstanding wettability and durability. It showed excellent resistance to high and low temperatures, UV radiation, chemical attack, and mechanical tests, with repairable ability and self-cleaning properties even after damage. The influence of multiple hybridizations on the coating's long-term corrosion stability and thermal properties was systematically studied, showing promising application prospects.