Analysis of difference in micro-morphology for Anti-icing based on adhesion work
Superhydrophobicity is directly associated with surface micro/nanostructure.Different micromorphology behaves different hy-drophobicity,even possibly showing the opposite state while contacting with the water droplet,thus leading to different anti-icing effect.The leaf of lotus and swing of cicada and the metal/nonmetal solid surface were representatively selected to be used for icing and adhesion strength test,showing that the hydrophobicity and icing adhesion property change with composition and microstructure.Based on the hydrophobic and anti-icing experiment of the natural and artificial surface,several typical surface models were designed to simu-late the surface microstructure and morphology.On the prerequisite of the composite wetting state being maintained by high roughness,and taking the pillar-shaped microstructure for example,the relationship between the adhesion work and the microstructure was estab-lished,followed by it,being applied to the other models.By calculating the adhesion work,the solid fraction and roughness,the difference in the adhesion work of icing for different micro-morphology was found;accompanied by it,the determined effect of the solid fraction on the adhesion work was also discussed as well as the roughness on the wetting state.Finally the standard of selecting adapta-ble morphology for anti-icing was theoretically proposed:high roughness,low solid fraction and low adhesion work.Summarizing the whole study process,property of anti-icing for surfaces with different micro-morphology was analyzed from different aspects of adhesion work,solid fraction and roughness,being all so much theory,of which validity may get to be further confirmed by a series of experi-ment.
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