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Fluorinated raspberry-like polymer particles for superamphiphobic coatings
Weijie Jiang1, Claudia M Grozea, Zengqian Shi
1Department of Chemistry, Queen's University , 90 Bader Lane, Kingston, Ontario, Canada K7L 3N6.
ACS Applied Materials & Interfaces
|February 8, 2014
Summary
Researchers developed raspberry-like polymer particles for superamphiphobic coatings. These fluorinated particles create highly water- and oil-repellent surfaces, demonstrating a practical bottom-up approach for advanced material applications.
Area of Science:
- Materials Science
- Polymer Chemistry
- Surface Science
Background:
- Developing superamphiphobic surfaces is crucial for applications requiring extreme water and oil repellency.
- Existing methods for creating these surfaces can be complex or lack scalability.
- Particulate coatings offer a promising route to achieve superamphobicity due to their hierarchical surface structures.
Purpose of the Study:
- To synthesize raspberry-like (RB) polymer particles using a bottom-up approach.
- To functionalize these RB particles with fluorinated polymers for enhanced repellency.
- To evaluate the superamphiphobic properties of coatings derived from these particles.
Main Methods:
- Surfactant-free free radical emulsion polymerization to create glycidyl-bearing particles (s-GMA and l-GMA).
- Amine functionalization of larger particles (l-NH2) followed by reaction with smaller particles to form RB structures.
- Surface fluorination of RB particles using a poly(2-(perfluorooctyl)ethyl methacrylate-co-glycidyl methacrylate) copolymer.
- Casting the functionalized RB particles onto glass substrates to form particulate coatings.
Main Results:
- Successfully synthesized raspberry-like polymer particles with distinct core-shell morphology.
- Achieved surface fluorination, imparting superamphobicity to the particles.
- Particulate coatings exhibited high static contact angles (>150°) and low droplet rolling angles (<15°) for various liquids including water, diiodomethane, and oils.
- Demonstrated excellent water and oil repellency, with static contact angles up to 165° for water.
Conclusions:
- The developed bottom-up strategy provides a practical and effective method for producing superamphiphobic particulate coatings.
- The raspberry-like morphology and surface fluorination are key to achieving high water and oil repellency.
- This approach holds potential for creating advanced repellent surfaces in various technological applications.
