Robust Fluorine- and Silicon-Free Slippery Surface toward Marine Antibiofouling and Anticorrosion

Bionic slippery liquid infused porous surface effectively tackles biofouling and corrosion issues in marine environments. However, there are challenges regarding lubricant loss, poor stability, and environmental threats posed by fluorine- and silicon-containing lubricants. Herein, a novel, highly stable, fluorine- and silicon-free solid-phase-change slippery surface (SPCSS) was proposed, which consists of a multilayer rough structure composed of flower-like ZnO-coated polydopamine and mesoporous silica loaded with antifouling agents, as well as a solid-phase-change lubricating layer comprised of polyethylene wax and tetradecane. SPCSS demonstrates an antifouling efficiency of up to 99.99% against proteins, bacteria, and algae. Electrochemical impedance spectroscopy reveals that SPCSS exhibits stable and outstanding corrosion resistance (|Z|_{0.01 Hz} = 5.48 × 10⁹ Ω cm²), significantly inhibiting microbial-induced corrosion. Furthermore, SPCSS undergoes rapid phase change and self-healing under near-infrared irradiation and maintains robustness after water erosion and high- or low-temperature exposure. This work presents a novel, stable, and efficient strategy for constructing slippery surfaces, offering broad application prospects in the fields of marine antifouling and anticorrosion.