Flexible Bio‐Inspired Fabrics With Visible‐Infrared Dual‐Band Camouflage for Wearable Multispectral Stealth

ABSTRACT

Realizing flexible dual‐band camouflage fabrics is fundamentally limited by the intrinsic physical conflict between visible color matching and low IR signatures, alongside the interfacial instability of functional layers during mechanical deformation. Herein, we report a highly durable fabric featuring synergistic visible‐infrared dual‐band camouflage via bio‐inspired interfacial anchoring and a gradient mechanical architecture. A reactive TA‐APTES interlayer transforms the inert textile into a functionalized interface, facilitating robust adhesion via covalent cross‐linking. Precise dual‐band camouflage patterns are achieved by fabricating an all‐polymer heterostructure (Fabric‐PANI‐PBFDO) via high‐throughput screen printing. Within this hierarchy, the PANI layer acts as a modulus‐gradient buffer, dissipating interfacial strain energy while providing high‐fidelity visible color matching with natural vegetation. The top self‐doped PBFDO layer exhibits exceptional conductivity (>800 S cm ⁻¹ ), enabling ultralow IR emissivity (ε = 0.1–0.3). Crucially, the fabric demonstrates pronounced electrothermal decoupling: generating substantial physical heat (up to 80°C) for hypothermia prevention while suppressing apparent radiation temperature to 50°C (ΔTmax = 30°C). This voltage‐driven thermal regulation allows the fabric to provide active heating while maintaining infrared outline‐disruption capability. Demonstrating exceptional radiative and mechanical stability over 1000 folding cycles, this work provides a scalable wearable textile platform for visible‐infrared dual‐band camouflage and electrothermal‐assisted infrared signature management.