Pearl‐Inspired Intelligent Marine Hetero Nanocomposite Coating Based on “Brick&Mortar” Strategy: Anticorrosion Durability and Switchable Antifouling

Abstract

Corrosion activities and biofouling pose significant challenges for marine facilities, resulting in substantial economic losses. Inspired by the “brick&mortar” structure of pearls, a novel nanocomposite coating (Pun‐HJTx) with long‐lasting anticorrosion and intelligent antifouling modes is fabricated by integrating a compatible MoS2/MXene heterostructure as the “brick” into a polyurea‐modified PDMS (Pun) acting as “mortar.” Notably, the presence of multiple hydrogen bonds within the coating effectively reduces the pinholes resulted from solution volatilizing. In the dark, where fouling adhesion and microbial corrosion activities are weakened, the MoS2/MXene plays a role in contact bactericidal action. Conversely, during daylight when fouling adhesion and microbial corrosion activities intensify, the coating releases reactive oxygen species (such as hydroxyl radicals and superoxide ions) to counteract fouling adhesion. Additionally, the coating exhibits multisource self‐healing performance under heated or exposed to light (maximum self‐healing rate can reach 99.46%) and proves efficient self‐cleaning performance and adhesion strength (>2.0 Mpa), making it highly suitable for various practical marine applications. Furthermore, the outstanding performance of the Pun‐HJT1 is maintained for ≈180 days in real‐world marine conditions, which proving its practicality and feasibility in real shallow sea environments.

NIR-Driven Self-Healing Phase-Change Solid Slippery Surface with Stability and Promising Antifouling and Anticorrosion Properties

“…These results indicate that PCSSS possessed remarkable adhesion resistance to proteins, bacteria, and algae under simulated static and dynamic marine conditions. Furthermore, as shown in Figure S4, the result of actual marine antifouling test indicates that there are no fouling organisms attached to the PCSSS after 90 days, suggesting that the PCSSS possesses superior antifouling performance in the actual sea and demonstrates the potential for the bionic ultraslippery surface application. , …”

“…Furthermore, as shown in Figure S4, the result of actual marine antifouling test indicates that there are no fouling organisms attached to the PCSSS after 90 days, suggesting that the PCSSS possesses superior antifouling performance in the actual sea and demonstrates the potential for the bionic ultraslippery surface application. 47,48 3.4. Anticorrosion Performance of PCSSS.…”