There are many natural materials with self-cleaning and anti-fouling surfaces. Their surface texture and the anti-fouling mechanisms are individually distinct, and depend on their environment and functionality. In this article, anti-fouling materials of high-density superhydrophilic polyelectrolyte brushes and fluoropolymer-infused nano-textured films were presented. Polyelectrolyte brushes repel n-hexadecane droplets under water, whereas the oil spreads in air. The oil repellent behavior in water was explained by hydration and swelling of the polyelectrolyte brushes in water as well as the low adhesion force between the brush and the oil due to the low interfacial tension. Nano-textured alumina gel films modified with low surface tension perfluoroalkyl phosphonic acid and infused with lubricating perfluoropolyether were fabricated. The liquid layer is stable, transparent, and slippery for both polar and non-polar liquids such as n-hexadecane and toluene. These materials have a potential for application as artificial anti-fouling coatings.
All Science Journal Classification (ASJC) codes
- Chemical Engineering (miscellaneous)
- Materials Science (miscellaneous)
- Environmental Science(all)
- Polymers and Plastics