Preparation and UV Aging Resistance of Superhydrophobic Pavement Anti-icing Coating
In winter,snow and ice accumulation on roads can pose a serious threat to driving safety if not cleared in a timely manner.Based on the theory of surface wetting,the superhydrophobic coating was prepared by constructing nano-scale rough structure on the surface of polyurethane with low sur-face energy.The hydrophobicity and ice-phobic properties of the coating were evaluated by contact an-gle,rolling angle test and ice breaking test on asphalt mixture.Considering the strong influence of ul-traviolet radiation on the road surface,the influence of UV radiation on the surface structural charac-teristics of superhydrophobic coating was analyzed from the perspective of surface free energy.The re-sults show that the contact angle between the superhydrophobic coating and water droplets is 161.176° and the rolling angle is 6.6°.The pressure required for ice breaking of superhydrophobic asphalt mix-ture is smaller than that of ordinary asphalt mixture.After simulating outdoor UV radiation for 24 months,the superhydrophobic coating still has good hydrophobic and ice repellent properties.
superhydrophobic coatingasphalt pavementice-phobic propertiesUV ageingsurface energy theory
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