Preparation And Application Of Functionalized POSS-Based Superamphiphobic Surface Coating

The superhydrophobic surface,which the water drops exhibit a contact angle greater than150°and a rolling angle less than 10°,is widely used in the fields of oil-water separation,self-cleaning,and anti-icing,anti-fogging and so on.However,superhydrophobic surface is easily polluted by some organic liquids because the surface tension of organic liquids is lower than that of the superhydrophobic surface.Therefore,it is of significance to fabricate superamphiphobic surface.In recent years,polyhedral oligomeric silsesquioxanes?POSS?with eight long-chain fluorinated alkyl groups?F-POSS?has received much research interest in superamphiphobic materials,because it presents excellent physical and mechanical properties,thermal stability,low surface energy.However,F-POSS is usually introduced on the surface by physically blending,resulting in excessive consumption,expensive cost,weak mechanical durability.Herein,this work uses functionalized POSS as a bridge to in situ fabricate fluorinated POSS-based superamphiphobic surface coating.Details are as following:?1?A robust and durable fluorinated 8-MAPOSS-based superamphiphobic fabric?Fabrics-S-MAPOSS-F?was obtained by in situ grafting of 3-Mercaptopropyltriethoxysilane?MPTES?,8-Methacryl polyhedral oligomeric silsesquioxane?8-MAPOSS?and 2-?perfluorooctyl?ethyl methacrylate?FMA?on a cotton fabric.FI-IR was used to determine the group of the coating.SEM was used to observe the coating morphology.XPS and EDS were used to detect the content of the surface element of the fiber and the chemical environment around the element.The thermal stability of the coating was characterized by TGA.The contact angle measuring instrument was used to quantitatively test the change of the surface wettability of the coating.The durability of the coating was evaluated by mechanical abrasion,ultraviolet radiation,high temperature,corrosive liquid and so on.The results show that the Fabric-S-MAPOSS-F can resist mechanical destruction?160 abrasion cycles,500 tape-peeling cycles,24 laundry cycles,knife scratching,hand twisting,finger hand touch and turbulent water flow impact?,destructive liquids?1 M HCl,1 M Na Cl,and 1 M HCl for 12 h,and 98%H₂SO₄ for 30 min?,UV irradiation?1000 W for at least 7 times?,and high temperature?30-300?for 2h?.Based on the air cushion structure,the Fabric-S-MAPOSS-F could float on the surface of water and blended oil,supporting 18.8 times and 15.6 times its own weights,respectively.The drag reduction rate of Fabric-SMAPOSS-F on the surface of water and blended oil reaches as high as?154.7%.?2?The superamphiphobic Cu mesh surface was developed by alkali assisted oxidation,coordination and a click chemistry reaction.FI-IR was used to determine the group of the coating.SEM was used to observe the coating morphology.EDS were used to detect the content of the surface element of the fiber and the chemical environment around the element.The contact angle measuring instrument was used to quantitatively test the change of the surface wettability of the coating.The durability of the coating was evaluated by wear abrasion,tape-peeling,100 cm-height hammer impact,severe hand twisting,strong acid/base/salt solutions,and high temperatures.The results show that the mesh presents high performance self-cleaning properties as well as excellent durability to 500 cycles of wear abrasion,1000 cycles of tape-peeling,a 100 cm-height hammer impact,severe hand twisting,a 12 hour immersion in acid solution?p H=1?/base solution?p H=14?/salt solution?1 M?,and a heat treatment of 300?for 2 h.