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Related Experiment Video

Updated: Dec 9, 2025

Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications
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Simple Preparation Method for Hydrophilic/Oleophobic Coatings.

Jinhui Li1, Le Yang1, Haifeng Liu2

  • 1School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China.

ACS Applied Materials & Interfaces
|September 11, 2020
PubMed
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Researchers developed a simple, durable hydrophilic/oleophobic coating on polyester filter cloth for efficient oil-water separation. The treated material demonstrates excellent separation efficiency and underwater anti-pollution properties, even with viscous oils.

Area of Science:

  • Materials Science
  • Surface Chemistry
  • Separation Technology

Background:

  • Developing advanced coatings for efficient oil-water separation is crucial for environmental remediation and industrial processes.
  • Hydrophilic/oleophobic surfaces offer unique properties for selective liquid manipulation and separation.

Purpose of the Study:

  • To create a simple and effective method for preparing a robust hydrophilic/oleophobic coating on polyester filter cloth.
  • To evaluate the oil-water separation efficiency, durability, and anti-pollution capabilities of the developed coating.

Main Methods:

  • Utilized polyester filter cloth as a substrate, coated with a mixture of hydrophilic polymers (poly(aspartic acid), poly(acrylic acid), poly(vinyl alcohol)) and SiO2 nanoparticles.
  • Applied vacuum silanization with 1H,1H,2H,2H-perfluorooctyltriethoxysilane to impart oleophobicity.
Keywords:
anti-oilhydrophilicoil−water separationoleophobicpoly(aspartic acid)

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  • Characterized surface properties using contact angle measurements and tested separation efficiency for hexadecane/water mixtures and various oils.

    • Main Results:

    • Achieved a hydrophilic/oleophobic surface with water contact angle of 3° and hexadecane contact angle of 99.8°.
    • Demonstrated high separation efficiency (98%) for hexadecane/water mixtures, maintaining over 98% after 20 cycles.
    • Exhibited excellent underwater anti-pollution properties against various oils (hexane, rapeseed oil, mineral oil, pump oil) with efficiencies above 97% for higher viscosity oils.

    Conclusions:

    • The developed coating method provides a simple, scalable, and durable solution for oil-water separation.
    • The hydrophilic/oleophobic polyester filter cloth shows significant potential for applications in environmental protection and oil spill cleanup.
    • The material's robust performance against various oils and its anti-pollution capabilities highlight its practical utility.