Simultaneously spray-assisted assembling reversible superwetting coatings for oil-water separation  

作　　者：Dexin Chen Zhixin Kang Wei Li Fenghua Su 

机构地区：[1]Institute of Advanced Wear&Corrosion Resistant and Functional Materials,Jinan University,Guangzhou 510632,China [2]Shaoguan Research Institute of Jinan University,Shaoguan 512027,China [3]School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,China

出　　处：《Chinese Journal of Chemical Engineering》2021年第4期144-150,共7页中国化学工程学报（英文版）

基　　金：The authors gratefully acknowledge financial support from Guangdong Basic and Applied Basic Research Foundation,China(No.2019A15150101011282);Open Funds of National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials(2019008);the Fundamental Research Funds for the Central Universities(21619336).

摘　　要：Here,superhydrophobic cuprous oxide(Cu2O)with hierarchical micro/nanosized structures was synthesized via sprayassisted layer by layer assembling.The asprepared superhydrophobic meshes with high contact angle(159.6°)and low sliding angle(1°)are covered with Cu_(2)O "coral reef"like micro/nanosized structures.Interestingly,the superhydrophobic mesh surfaces became superhydrophilic again due to the oxidization of Cu_(2)O to CuO by annealing at a higher temperature(300℃).And the superhydrophobic properties would be recovered by heating at 120℃.Furthermore,the superwetting meshes were applied to design a miniature device to separate light or heavy oil from the wateroil mixtures with excellent separation efficiency.These superwetting surfaces by simultaneously sprayassisted layer by layer assembling technique show the potential application in universal oilwater separation.

关 键 词：Simultaneously spray deposition Superhydr ophobicity Reversible superwetting Oil-water separation 

分 类 号：TB306[一般工业技术—材料科学与工程]