Journal
APPLIED SURFACE SCIENCE
Volume 537, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2020.147986
Keywords
Hydrogel; Phosphorylated poly (vinyl alcohol); Superhydrophilic; Oil repellency and oil-water separation
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Funding
- China Scholarship Council [201806990037]
- Foundation of MOE Key Laboratory of New Processing Technology for Nonferrous Metal and Materials, Guilin University of Technology [19AA-10]
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A superhydrophilic and underwater superoleophobic phosphorylated PVA (PPVA) hydrogel-coated stainless-steel mesh has been developed for efficient separation of oil-water mixtures and emulsions, showing good chemical stability and wear resistance.
Special wettable materials have been shown to be promising for use in oil-water separation and, in particular, hydrogel-based materials have been studied for water separation from oil-water mixtures due to their high hydrophilicity. Here, a superhydrophilic and underwater superoleophobic phosphorylated PVA (PPVA) hydrogel-coated stainless-steel mesh with underwater oil repellency was prepared using a simple and facile route that introduced metal ions for PVA crosslinking. The PPVA hydrogel-coated mesh can not only separate immiscible oil-water mixtures but also separate surfactant-stabilized oil-in-water emulsions with a high separation efficiency (> 99.2%). In addition, due to its multiple crosslinked networks, the resultant PPVA hydrogel-coated mesh exhibited good chemical stability and wear resistance and can tolerate high acid, alkali, salty and organic solvents.
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