Abstract:

Optical camouflage technology faces escalating challenges as detection systems evolve toward multi-spectral capabilities spanning visible (VIS), thermal infrared (TIR), and hyperspectral (HS) bands. This presentation synthesizes advances in biomimetic strategies for achieving multi-band camouflage by simulating vegetation’s optical signatures. While electrochromic polymers (e.g., PSBF-ProDOT) enable dynamic VIS color shifts (yellow-to-purple) to mimic seasonal foliage, their inability to regulate TIR radiation limits practical utility. Inspired by plant transpiration, porous materials like superhydrophobic silica aerogels and boron nitride composites replicate evaporative cooling, reducing surface temperatures by 0.36–0.84 kg·m⁻²·h⁻¹ to align TIR emissions with leafy backgrounds. For HS camouflage, spectral fingerprint replication across 350–2500 nm remains critical: layered double hydroxide coatings achieve spectral cosine similarities up to 0.974 with natural leaves, yet lack adaptive responsiveness. Key challenges persist in reconciling conflicting spectral requirements—e.g., VIS color matching often conflicts with TIR emissivity control. Emerging solutions integrate hierarchical structures for multi-physics regulation: gradient porous fibers synchronize directional water transport (emulating stomatal cooling) with pigment-embedded spectral mimicry, while pH/thermal-responsive polymers enable reversible color adaptation. Future directions emphasize intelligent systems combining real-time spectral tuning, transpiration-mimetic thermal management, and machine learning-driven pattern optimization to address dynamic environmental variations.

ALL INTERESTED ARE WELCOME