Low-maintenance superamphiphobic coating based on a smart two-layer self-healing network

Superamphiphobic surfaces with a rapid ability to autorepair from multiple damages are desirable for long-lived self-cleaning coatings. Previous studies have almost introduced such a self-healing surface against chemical or physical damage, however, the regeneration is out of work as stain accumulates over time. Herein, a low-maintenance superamphiphobic coating based on a smart two-layer self-healing network has been presented. The coated fabric can withstand at least 200 cycles of abrasion under a pressure of 45 kPa and strongly resist to UV radiation, boiling treatment, strong acid/base immersion and smudge treatment, without apparently changing the superamphiphobicity. Besides physical and chemical damages, the coating can even rapidly retain its super liquid-repellence against a long-term accumulation of smudge by using a short heating treatment. Such a rapid and multiple self-healing ability resulting from the smart two-layer network may be useful for the development of low-maintenance protective coatings.