etikkakäsittelyn

Etikkakäsittely refers to the process of treating wood with acetic anhydride. This process modifies the wood's cell structure, making it more stable and durable. The acetylation process involves reacting the hydroxyl groups in the wood's cellulose and lignin with acetic anhydride. This chemical modification reduces the wood's ability to absorb and release moisture, which in turn minimizes swelling and shrinking. As a result, acetylated wood exhibits improved dimensional stability, increased resistance to decay and insect attack, and a longer service life compared to untreated wood.

The treatment is typically carried out at elevated temperatures and pressures to ensure proper penetration and reaction of the acetic anhydride. The end product is a wood material that is often used in applications where durability and stability are crucial, such as in outdoor decking, cladding, windows, doors, and structural elements. Acetylated wood is also considered an environmentally friendly alternative to some conventional wood preservation methods, as the process does not involve the use of toxic chemicals. The acetylation process is non-toxic and the byproducts are generally water and acetic acid, which can be recovered. The resulting wood is safe for contact with humans and the environment.