Research progress in superoleophobic surface

Superoleophobic refers to the phenomenon that the contact angle (CA) of the oil droplet with low surface tension on the solid surface is greater than 150° as well as the sliding angle (SA) is less than 10°. However, due to the low surface tension of organic liquids,the construction of superoleophobic surfaces was relatively difficult. Inspired by springtail,re-entrant structure has become a breakthrough to solve this problem.Together with surface chemical composition modification and surface roughness,it has been introduced into the design and manufacturing system of superoleophobic surface. Several classical wetting models such as Young model,Wenzel model,Cassie-Baxter model were introduced,the design methods of superoleophobic surfaces were elaborated from the structural structure and chemical composition,and the research progress of superoleophobic surface preparation technologies such as electrospinning,sol-gel method,deposition method,etching method and laser processing was discussed,the oleophobic properties of various surfaces under test liquids with different surface tension were summarized. Finally,the research direction of superoleophobic surface was prospected,that is,low cost,simple operation,environmental friendly and excellent physical and chemical properties of the obtained surfaces. The preparation technology of superoleophobic surfaces would be further explored.