Wettability of the Superhydrophobic Surface Under Condensation State Condition

The wettability of superhydrophobic surface has become the hot point in many fields.The wettability of the superhydrophobic surface under condensation state condition is studied by measurement of the contact angle and observation of polarizing light microscopy.It is found that the water vapor could condense in the small gap of the rough surface and the superhydrophobicity of the rough surface is destroyed.And the wettability of the superhydrophobic surface showed the heterogeneity,even some part became hydrophilic.According to the analysis,a calculation model is proposed for the condensing droplets on superhydrophobic surface and it was validated by the measurements of contact angle.