Amphiphobicity of polyvinylidene fluoride porous films after atmospheric pressure plasma intermittent etching

► An intermittent Ar plasma treatment of PVDF films under atmospheric pressure. ► The optimum treatment conditions of 10 min, 200 W, 10 LPM, and 10 mm/s. ► The plasma-modified PVDF porous film shows amphiphobicity. ► A small amount of hydrophilic solid spines and many superamphiphobic uniform micro air pockets.