Chameleon-Inspired Coating For Adaptive Building Temperature Control

Researchers at the American Chemical Society have developed a color-changing coating that mimics the thermal regulation abilities of the Namaqua chameleon. This innovative material adjusts its reflectivity based on temperature, keeping buildings cool in summer and warm in winter without additional energy input. The coating consists of thermochromic microcapsules, specialized microparticles, and binders, forming a suspension that can be sprayed or brushed onto surfaces.

Key Findings

• The coating transitions from dark to light gray when heated to 68°F, reflecting up to 93% of solar radiation at 86°F.

• It remains undamaged even after prolonged exposure to temperatures above 175°F.

• In outdoor tests across all four seasons, the coating adapted to fluctuating temperatures, switching between heating and cooling modes.

• Compared to conventional coatings like white paint, passive radiative cooling paint, and blue steel tiles, this material provided superior thermal regulation.

• The system is cost-effective, easy to manufacture, and could significantly reduce energy consumption in regions with seasonal temperature variations.

Wang, F., et al. (2023). Chameleon-inspired coating could cool and warm buildings through the seasons. Nano Letters.