Latent-Radiative Thermostat autonomously/ flexibly regulates temperature in buildings by changing material's transparency based on temperature

https://techxplore.com/news/2025-11-nature-hydrogel-power-free-thermal.html

"thermal management inspired by leaf of white poplar tree... polyacrylamide hydrogel-based composite... 2 systems: (1) lithium ions absorb moisture from air condensing it releasing heat keeping material warm in cold conditions, (2) hydroxypropyl cellulose manages radiative heat becoming transparent accepting sunlight in low temperatures/ opaque (reflects sunlight) in high temperatures... titanium dioxide nanoparticles for durability... up to 153 MJ/m² annual savings: up to 3.7°C lower in summer/ up to 3.5°C higher in winter"