Seven kinds of hydrophobic surfaces

which have the typical characteristics of micron particle structure

mixed structure of micron particle and nano-fiber

and nano-fiber structure with the surfaces of nano/micro-structure being controllable

were prepared via adjusting the concentration of spinning solution in the method of electro-spinning.The microstructure of the surfaces was characterized and the hydrophobicity of the hydrophobic surfaces mentioned above was tested.The characteristics of frosting suppression on the nano/micro-structured hydrophobic surface were studied by means of experimental comparison of the process of frosting and the performance of frosting suppression

combined with the analysis of surface fractal dimension.The results showed that although all of the nano/micro-structured hydrophobic surfaces studied were hydrophobic with their static contact angle between 139? and 152?

their hydrophobicity did not closely correlate with its frosting suppression capacity.The capacity for frosting suppression of the hydrophobic surfaces was largely dependent upon the surface characteristics and decreased with increasing fractal dimension of surface structure.