Search results
Results From The WOW.Com Content Network
Thermally modified wood is engineered wood that has been modified by a controlled pyrolysis process of wood being heated to (> 180 °C) in an oxygen free atmosphere. This process changes to the chemical structures of wood's cell wall components lignin , cellulose and hemicellulose which decreases its hygroscopy and thus increases dimensional ...
Torrefaction is a thermochemical treatment of biomass at 200 to 320 °C (392 to 608 °F). It is carried out under atmospheric pressure and in the absence of oxygen.During the torrefaction process, the water contained in the biomass as well as superfluous volatiles are released, and the biopolymers (cellulose, hemicellulose and lignin) partly decompose, giving off various types of volatiles. [4]
Apart from structural wood preservation measures, there are a number of different chemical preservatives and processes (also known as timber treatment, lumber treatment or pressure treatment) that can extend the life of wood, timber, and their associated products, including engineered wood. These generally increase the durability and resistance ...
Burning pieces of wood, showing various stages of pyrolysis followed by oxidative combustion. Pyrolysis is the process of thermal decomposition of materials at elevated temperatures, often in an inert atmosphere [ 1 ] without access to oxygen.
Acetylated wood is a type of modified wood that is produced through a chemical modification process. [1] It produced from a chemical reaction (named as acetylation ), involving acetic anhydride and a modification process to make wood highly resistant to biological attacks by fungi and wood-boring insects and durable to environmental conditions.
Engineered wood is the name for a number of composite materials which are manufactured by binding together wood strands, particles, fibers, or veneers. Wikimedia Commons has media related to Engineered wood .
The Israeli government will return a camera and broadcasting equipment it had seized from The Associated Press on Tuesday, reversing course hours after it blocked the news organization's live ...
This page was last edited on 6 July 2014, at 14:43 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply ...