By Robert Dalheim
COLLEGE PARK, Md. – The research team behind “super wood” is at it again – this time engineering a wood that’s capable of staying 12 degrees cooler than regular wood.
Researchers at the University of Maryland and the University of Colorado hoped to find a passive way for buildings to dump heat sustainably. The solution is wood – it is already used as a building material, and is renewable and sustainable. Using tiny structures found in wood – cellulose nanofibers and the natural chambers that grow to pass water and nutrients up and down inside a living tree – the researchers engineered wood that radiates away heat.
The UMD team soaked basswood in a solution of hydrogen peroxide, which destroys the wood’s lignin. The team then used a hot press to compress the remaining cellulose and hemicellulose components together. To make it water repellent, they added a super hydrophobic compound that helps protect the wood.