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Femtosecond Laser Microfabrication of Porous Superwetting Materials for Oil/Water Separation: A Mini-Review

Authors
  • Feng, Na1
  • Yong, Jiale2
  • 1 School of Chemistry and Chemical Engineering, Southwest University, Chongqing , (China)
  • 2 School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an , (China)
Type
Published Article
Journal
Frontiers in Chemistry
Publisher
Frontiers Media S.A.
Publication Date
Sep 25, 2020
Volume
8
Identifiers
DOI: 10.3389/fchem.2020.585723
PMID: 33102449
PMCID: PMC7545643
Source
PubMed Central
Keywords
License
Unknown

Abstract

Frequent oil-leakage accidents and large quantities of oil-bearing wastewater discharge cause severe environmental pollution and huge economic losses. Recently, superwetting porous materials are successfully utilized to separate oil/water mixture (OWM) based on the different interfacial behavior of water and oil. Here, we summarize the recent development of efficient oil/water separation (OWS) based on the femtosecond laser-induced superwetting materials. The typical wettability-based separation manners (including “oil-removing” and “water-removing”) and the characteristic of the femtosecond laser are introduced as background. Various laser-structured porous sheets with either superhydrophobicity or underwater superoleophobicity are successfully used to separate different OWMs. The laser processing methods, surface wettability, separation process, and separation mechanism of these laser-structured separation materials are reviewed. Finally, the current challenges and prospects in achieving OWS by femtosecond laser microfabrication are discussed.

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