Fabrication Of Liquid Porous Silicone Superslippery Surface And Research Of Its Icephobic Performance

Ice accumulation has caused many negative effects on human activities.Due to a series of unsolved problems such as high cost,low energy consumption and low efficiency of traditional active deicing technology,passive anti-icing coatings attract increasing attention.Slippery liquid-infused porous surface comes into the spotlight of anti-icing coatings in recent years due to their extremely low ice adhesion strength.Although they are emerging to be one of the most promising resolutions,the slippery coatings are argued by their poor stability and short service life.In view of the life problem of the slippery surface,this topic studies a kind of liquid porous silicone super-slippery surface from two aspects including the fabrication,icephobic performance and its principle.The switchable dynamic porous structure was prepared by water pore-making method.The slippery surface was formed by soaking silicone oil until it was swollen and saturated.The surface could maintain low ice adhesion strength(2.5kpa)for a long time and keep effective icephobic performance after 160 icing/deicing cycles.The coating has a smooth,lubricating surface and a switchable porous structure,which can store a large amount of phenyl silicone oil in independent pores.This droplet-embedded structure enables the surface to have a series of self-adaptive mechanisms,which are adaptive to maintain high swelling state continuously,release a certain amount of oil only in the case of icing or oil consumption,and demonstrate good long-term icephobicity with temperature responsiveness and excellent anti-wear properties.In addition,these materials show good mechanical properties,fatigue resistance,and strong adhesion to substrates.The liquid-infused porous silicone coatings display a broad application prospect because of their long-term icephobicities,facile fabrication method,and low cost of raw materials.