Wood that can resist water and mildew has quietly arrived. This is the latest achievement of American scientists. The Georgia Institute of Technology team led by Mark Losego is using an existing technology called atomic layer deposition. Although commonly used in the manufacture of electronic products, in this case, the technology is used to deposit ultra-thin protective coatings of metal oxides throughout the honeycomb structure of wood.
The process involves placing the wood in a low-pressure airtight chamber and then introducing metal oxide gas. Gas molecules continue to penetrate into the wood, using interconnected pores as internal paths, and they propagate through the wood. When these molecules do this, they react with wood to form a metal oxide coating on their internal structure.
Although the coating is only a few atoms thick, even if the wood is submerged, it can effectively prevent the wood from absorbing moisture. As a result, it may also be due to other effects of this treatment that the wood has greater resistance to mold growth over time. In addition, the treated wood is also less thermally conductive than ordinary wood, allowing the building to be better insulated to prevent heat loss.
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