SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2021, Vol. 32 ›› Issue (4): 144-150.DOI: 10.1016/j.cjche.2020.07.033

• Separation Science and Engineering • Previous Articles     Next Articles

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

Dexin Chen1,2, Zhixin Kang3, Wei Li1,2, Fenghua Su3   

  1. 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
  • Received:2020-02-27 Revised:2020-07-10 Online:2021-06-19 Published:2021-04-28
  • Contact: Dexin Chen, Zhixin Kang
  • Supported by:
    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) and the Fundamental Research Funds for the Central Universities (21619336).

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

Dexin Chen1,2, Zhixin Kang3, Wei Li1,2, Fenghua Su3   

  1. 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
  • 通讯作者: Dexin Chen, Zhixin Kang
  • 基金资助:
    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) and the Fundamental Research Funds for the Central Universities (21619336).

Abstract: Here, superhydrophobic cuprous oxide (Cu2O) with hierarchical micro/nanosized structures was synthesized via spray-assisted layer by layer assembling. The as-prepared superhydrophobic meshes with high contact angle (159.6°) and low sliding angle (1°) are covered with Cu2O "coral reef" -like micro/nanosized structures. Interestingly, the superhydrophobic mesh surfaces became superhydrophilic again due to the oxidization of Cu2O 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 water-oil mixtures with excellent separation efficiency. These superwetting surfaces by simultaneously spray-assisted layer by layer assembling technique show the potential application in universal oil-water separation.

Key words: Simultaneously spray deposition, Superhydrophobicity, Reversible superwetting, Oil-water separation

摘要: Here, superhydrophobic cuprous oxide (Cu2O) with hierarchical micro/nanosized structures was synthesized via spray-assisted layer by layer assembling. The as-prepared superhydrophobic meshes with high contact angle (159.6°) and low sliding angle (1°) are covered with Cu2O "coral reef" -like micro/nanosized structures. Interestingly, the superhydrophobic mesh surfaces became superhydrophilic again due to the oxidization of Cu2O 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 water-oil mixtures with excellent separation efficiency. These superwetting surfaces by simultaneously spray-assisted layer by layer assembling technique show the potential application in universal oil-water separation.

关键词: Simultaneously spray deposition, Superhydrophobicity, Reversible superwetting, Oil-water separation