Hierarchically Interface‐Programmed Modified Polyurethane for Self‐Healing and Weather‐Resistant Protection

Abstract Developing multifunctional protective coatings with long‐term durability, UV resistance, and autonomous healing capability is crucial for addressing corrosion challenges in harsh service environments. Herein, a hierarchically interface‐programmed polyurethane composite coating is constructed by covalently grafting an antioxidant into the polymer backbone and embedding photothermal‐active polyacrylonitrile/cobalt–manganese–nickel layered double hydroxide (LDH) nanofibers via electrospinning and template etching. The antioxidant‐modified matrix suppresses photooxidative degradation, while the LDH nanofillers enable efficient solar‐to‐thermal conversion, ion trapping, and strong interfacial hydrogen…

• NN
  National Natural Science Foundation of China

  Awards: 42476210, 52371081
• NS
  Natural Science Foundation of Shandong Province

  Award: ZR2024ME102
• KT
  Key Technology Research and Development Program of Shandong

  Award: 2025CXGC010705
• FR
  Fundamental Research Funds for the Central Universities

  Awards: 202562010, 202561100