This inorganic fiber-based paper passively cools buildings, vehicles and much more.

Researchers at Northeastern University have developed a new paper material made from fibers of a calcium-based material called hydroxyapatite that has the potential to passively cool buildings and vehicles, reducing the need for air conditioning. The paper is capable of reflecting solar radiation and has a high infrared emittance, allowing heat to escape. The material is produced using a precipitation method and can be incorporated into a roll-to-roll process for large-scale production. The researchers have formed a startup company called Plank Energies to commercialize the paper. The hydroxyapatite fibers are biocompatible and have intrinsic properties such as fire resistance and self-cleaning capabilities. [Extracted from the article]