Phase‐Change‐Activated Slippery Organogel Composite for All‐in‐One Anti‐Corrosion, Antifouling, and Self‐Cleaning

Dynamic antifouling surfaces have emerged as a promising alternative, offering the potential for eco‐friendly and high‐performance antifouling coatings. However, the practical deployment of conventional dynamic slippery surfaces is hampered by inherent challenges such as lubricant depletion, mechanical instability, and limited long‐term durability. To overcome these limitations, we report a novel slippery liquid‐infused composite organogel (OG/PTA) designed to incorporate an inner antibacterial molecule that is released upon depletion or loss of the surface lubricant layer. Through a simple yet universal phase‐change‐induced fabrication strategy, the coating employs a multi‐modal antifouling strategy, combining active release of tannic acid, intrinsic hydrophobicity, nonpolar surface properties, and dynamic liquid lubrication. Collectively, this synergistic design confers broad‐spectrum resistance against fouling from proteins, bacteria (i.e., 97.45% for Escherichia coli ), and microalgae (i.e., 97.76% for Phaeodactylum tricornutum ). Furthermore, the OG/PTA coating exhibits ultra‐low surface roughness with a Ra of 1.02 nm, high tensile strength of 11.5 MPa, and rapid self‐cleaning capability. Remarkably, the OG/PTA coating also demonstrates reliable durability under repeated abrasion of 100 cycles, together with exceptional performance in anti‐icing, anti‐corrosion, and optical transparency. This work establishes a new paradigm in the design of liquid‐infused organogel coatings, paving the way for robust dynamic lubricating interfaces with promising real‐world applications.