Dynamic Fluidic Compensation on Interflow Slippery Surfaces Enables Durable Anti‐Fouling and Suppresses Ice‐Solid Interlocking

ABSTRACT Conventional liquid‐infused surfaces suffer from rapid lubricant depletion and lack thermodynamic stability in complex aquatic environments or subzero climates. Herein, a bio‐inspired interflow self‐sufficient slippery surface (slippery‐ISSS) is proposed. Fabricated via scalable picosecond laser processing, this surface features an interconnected capillary network that provides dynamic fluidic compensation to autonomously restore the liquid‐shielding interface upon mechanical disruption. By integrating targeted capsaicin doping, the system achieves a synergistic physical‐chemical defense, demonstrating durable anti‐fouling performance with negligible biological accumulation after 90‐day outdoor immersion in natural lotus pond sludge. To address the freezing challenges, an interfacial heat transfer model is constructed to elucidate the delayed phase‐change process, while the structural capillary network dynamically redistributes the lubricant to accommodate ice volume expansion, effectively suppressing ice‐solid interlocking. This anti‐interlocking mechanism, combined with localized heat flux manipulation, enables spontaneous dewetting and gravity‐driven ice detachment at ‐15°C under solar irradiation (0.03 W cm −2 ). Furthermore, the surface maintains an ice adhesion of ∼22 kPa over 50 consecutive cycles. Supported by the interfacial adhesion dynamics and thermodynamic models, this work provides a quantifiable strategy for designing robust, multiphase‐resistant functional materials.