The CIOL® process includes a mixture of water, citric acid, sorbitol and additives. The CIOL® solution is absorbed into the wood matrix with vacuum and pressure process. The impregnation solution is then fixed in the wood by a curing step. All chemicals are derived from natural processes and will therefore be more environmental-friendly compared to the standard impregnation of today. Citric acid and different sugar alcohols (polyols) have been investigated as a wood protection agent (Berube et al. 2018; Essoua et al. 2016; Guo et al. 2019; L’Hostis et al. 2018). The recent publications in this field of research describe the use of citric acid and sorbitol (Larnøy et al. 2018, Kurkowiak et al. 2021b;). The formed polyester in wood altered the wood properties in several ways. To improve particle boards based on biproducts from the CIOL® process there is a need to take a closer look on the production side. The goal of this study is therefore to improve all the relevant board properties and to find application areas for the final product. Particle size distribution, amount of adhesive and hardener as well as process parameters are therefore varied.
Keywords: CIOL®, wood protection, wood particle boards
Authors
Ingeborg Ohren Nordraak
Norwegian University of Life Science, Norway
Synne Strømmen
Norwegian University of Life Science, Norway
Andreas Treu
Norwegian University of Life Science, Norway
Erik Larnøy
Norwegian Institute of Bioeconomy Research
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