4.6 Article

Underwater superoleophobicity of poly(vinyl alcohol) gel-coated/micro-arc oxidized Al mesh for oil-water separation

Journal

MATERIALS CHEMISTRY AND PHYSICS
Volume 292, Issue -, Pages -

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2022.126817

Keywords

Micro-arc oxidation method (MAO); Self-cleaning properties; Chemical stability; Wear resistance; Oil-water separation

Funding

  1. Young Elite Scientists Sponsorship Program by CAST
  2. [2021QNRC001]

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New oil-water separation materials were developed in this study, which had easy cleaning ability and long-term efficiency. The materials, consisting of ceramic coating on aluminum mesh and covered with poly (vinyl alcohol) gel, demonstrated good self-cleaning properties and oil repellent function. With a simple preparation process, low cost, and excellent performance, the PVA@MAO Al mesh has wide application prospects in oil spill cleanup, wastewater treatment, and water purification.
In response to the fact that oil removal materials were easily contaminated by viscous oil, materials with easy cleaning ability and long-term efficiency were developed for oil-water separation in this study. The ceramic coating was prepared on the surface of aluminum mesh by the micro-arc oxidation (MAO) method, and poly (vinyl alcohol) gel (PVA) was used to cover the MAO Al mesh. PVA@MAO Al mesh with subsea oil repellent function was prepared. As expected, PVA@MAO Al mesh exhibited good hydrophilic properties in the air and oleophobic properties underwater. The synthetic PVA@MAO Al mesh exhibited good self-cleaning properties, chemical stability, and abrasion resistance. Compared with the traditional oil-water separation method, this method has a simple preparation process, low cost, and excellent performance. These properties make PVA@-MAO Al mesh ideal for oil-water separation. It has wide application prospects in oil spill cleanup, wastewater treatment, and water purification.

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