Underwater superoleophobic cement-alumina coated meshes for oil/water and emulsion separation

Abstract

A novel cement-alumina coated stainless steel mesh (CA@SSM) was fabricated by a simple, economical and green blade coating route. The superhydrophilic-underwater superoleophobic CA@SSM exhibits high efficiency for the separation of water from various oils. The CA@SSM also shows high tolerance to boiling, saline and alkaline water and excellent behavior for separating oil/water mixtures in coarse conditions. Furthermore, the CA@SSM displays excellent capability for separating different oil-in-water emulsions. The CA@SSM is expected to be applied in oily wastewater and oil leakage treatment.

Graphical Abstract

Keywords:

• Cement-alumina
• oil/water separation
• underwater superoleophobicity
• superhydrophilicity
• blade coating

Additional information

Funding

We acknowledge the financial support from the Natural Science Foundation of Ningxia, China (2020AAC03194), and Fundamental Research Funds of the Central Universities, North Minzu University (2020XYZCL02).