Durable superamphiphobic coatings with low sliding angle

• 作 者: J.Zhang B.C.Li L.X.Li
• 机 构: Department,University,City,Postal code,Country1 Center of Eco-material and Green Chemistry,Lanzhou I
• 出 处: The 5th International Conference of Bionic Engineering 第五届国际
• 发表日期: 2016年3期
• 关键词: silanes superoleophobic palygorskite

　　Superamphiphobic coatings repellent to both water and organic liquids have generated extensive attention.Different from superhydrophobic surfaces,the creation of superamphiphobic surfaces is difficult because of the low surface tension of organic liquids compared to water.Although various methods have been used,most superamphiphobic surfaces only repel liquids with surface tension above 27.5 mN m-1(n-hexadecane).In addition,organic liquids often have high contact angles(CAs ≥ 150°)but adhere stably on the surface and cannot roll off,which means lack of the important self-cleaning property.It is still very challenging to create superamphiphobic surfaces on which liquids of low surface tension could roll off easily with low sliding angles(SAs)because the liquid-solid interaction should be very weak.Both special microstructures(e.g.,re-entrant curvatures,overhang structures,silicone nanofilaments and fabrics)and materials of very low surface energy(e.g.,fluorodecyl POSS)are necessary to achieve low SAs.However,most methods are complicated,expensive and limited to specific substrates,which hamper their applications.