Graded fillers method fabricating superamphiphobic coatings with high thermal conductivity, wear resistance and durable corrosion resistance

The superamphiphobic coatings with high thermal conductivity and wear resistance have attracted wide attention in academic fields, but its construction through sheet fillers is very challenging. Herein, the graded filling of modified flake graphite and modified Al2O3 was used to prepare epoxy resin/polytetrafluoroethylene powder/modified flake graphite/modified Al2O3 (EP/PTFE/FG/Al2O3) coating by two-step spray method, which can ensure stable nonwetting performance toward water, acid-base solutions (pH = 1–14), glycerol and ethylene glycol. More importantly, it also promised excellent wear resistance (1000 cycle wear times) and high thermal conductivity (1.822 ± 0.023 W/(m·K)). Furthermore, salt spray tests indicated that the EP/PTFE/FG/Al2O3 coating had an outstanding anticorrosion. It can be foreseen that the simple but effective superamphiphobic coatings are applied in the fields of heat conduction and anticorrosion.