Factors affecting the wettability of different surface materials with vegetable oil at high temperatures and its relation to cleanability

► cos θ of olive oil on different surface materials rises linearly with increase in temperature. ► Slopes are much higher for quasicrystalline and polymers than for ceramics. ► Increase in surface roughness and surface flaws increases surface wettability. ► Contact angle values gave information for grouping easy-clean polymers from other materials. ► Contact angle measurements cannot directly estimate the cleanability of a surface.