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 Al 2 O 3 was used to prepare epoxy resin/polytetrafluoroethylene powder/modified flake graphite/modified Al 2 O 3 (EP/PTFE/FG/Al 2 O 3) 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/Al 2 O 3 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. • Graded fillers method enhanced the thermal conductivity, anticorrosion and superamphiphobicity of coating. • Superamphiphobic coatings have excellent wear resistance, strong adhesive ability and nonwetting stability. • Robust superamphiphobic coatings can be prepared on a large scale by two-step spraying method. [ABSTRACT FROM AUTHOR]