To mitigate the attachment of fouling organisms , Slippery Liquid-Infused Porous Surfaces (SLIPS) hold tremendous potential as a green and broad-spectrum antifouling solution, capable of replacing traditional antifouling coatings. However, the complexity of current preparation methods and the limited lifespan of lubricating oils constrain their widespread application in marine antifouling for vessels. In this study, melamine sponge (MS) was used as a substrate, and modifications were made by introducing superhydrophobic silica nanoparticles (SiO 2 NPs), a biocompatible adhesive (ethyl cyanoacrylate, ECA), and a highly stretchable polymer (poly-ε-caprolactone, PCL). By combining natural surface microstructures with additional nanomaterials , we successfully obtained a superoleophilic surface, effectively capturing liquid lubricants and maintaining their long-term stability. The sponge substrate possesses distinctive contractility, with the lubricant stored in the grid spontaneously compensating for the loss of surface lubricant, thereby effectively enhancing its durability. This study provides a straightforward fabrication method with reduced manufacturing costs for environmentally friendly marine anti-fouling coatings. The approach demonstrates a prolonged cyclic anti-fouling effect, effectively advancing the development of SLIPS for anti-fouling applications in shallow marine environments.
The slippery liquid-infused porous surfaces (SLIPS) have recently attracted significant interest in marine antifouling and corrosion protection. Nevertheless, the insufficient durability and corrosion resistance of SLIPS considerably affect their application potential. In this work, a preparation strategy for ultradurable slippery organic coating was proposed to combat biofouling and corrosion. Digital light processing (DLP) was first employed to fabricate organic protective coatings with gradient porous structures to improve the stability and durability of the SLIPS. The structure with a smaller pore size in the upper segment relative to the basal area was designed to concurrently enhance the lubricant’s storage and retention capabilities. The antifouling experiment demonstrated excellent antifouling performance, with a bacterial colonization of merely 2.08% after immersion in a Pseudomonas aeruginosa solution for 28 days. The antialgae assessment demonstrated that the surface antifouling efficacy of the gradient SLIPS coating was enhanced by 99.75% after a 10-day immersion period. The EIS results indicated that the SLIPS coating with a gradient porous structure exhibited remarkable corrosion resistance, as evidenced by a |Z|0.01 Hz value of 2.93 × 1010 Ω·cm2 after 60 days of immersion. The gradient porous structure effectively resolves the intrinsic dilemma between the storage and depletion of lubricant, which greatly improves the stability and durability of the SLIPS coating. The ultradurable slippery organic coating with facile preparation and controllable structure exhibits exceptional long-term antifouling and anticorrosion properties, thereby making it highly promising for potential application.
危险品化学品经营许可证（带存储）