Ultrahigh biologically adhesive ZnTiCe- layered double hydroxide@polydopamine for multispectral military protection

Modern protective materials demand multifunctional integration to address extreme environmental challenges, particularly in desert and high-altitude terrains requiring concurrent defense against ultraviolet (UV) radiation, visible-light detection, and infrared (IR) surveillance. However, conventional UV- protective systems often fail to integrate IR stealth and visual camouflage capabilities, significantly limiting their military utility. Herein, we develop a bioadhesive ZnTiCe-layered double hydroxide@polydopamine (ZnTiCe-LDH@PDA) composite via urea hydrothermal synthesis and interfacial modification. XRD and XPS analyses confirm that strategic Ce doping induces lattice distortion in the ZnTi-LDH matrix, effectively narrowing the optical bandgap from 3.86 eV to 3.69–3.74 eV and enhancing UV shielding performance (11.7 % transmittance at 350 nm vs. 32.4 % for pristine LDH). The meticulously designed multilayer architecture, combined with functional anion groups in LDH, achieves IR concealment through synergistic absorption and multiwavelength reflection-attenuation mechanisms (8.77 ± 0.25 °C thermal gradient reduction in murine models). The surface-engineered PDA coating enables range from white to black for visual camouflage, while demonstrating robust dermal adhesion and potent antioxidant activity (45.27 ± 0.51 % DPPH radical scavenging). Biosafety evaluations reveal negligible cytotoxicity, minimal hemolysis, and non-irritation, underscoring its practical potential. This work establishes a “molecular doping–structural optimization–interface engineering” triadic synergy mechanism, providing a groundbreaking paradigm for next-generation adaptive multispectral protective materials.