Abstract
Samples of pine wood ozonated with different contents of water are studied via UV diffuse reflectance spectroscopy. It is shown that polyaromatic and stilbene structures, guaiacyl derivatives, and carbonyl- and carboxyl-containing aromatic structures of lignin are destroyed during ozonation of pine wood. The destruction of aromatic structures proceeds efficiently in wood with a moisture content of more than 60–65% in the 2–3 mmol/g range of ozone consumption. When the moisture content is below 40%, ozone treatment of pine wood at low ozone consumption allows us to obtain different modifications of oxygen-containing aromatic and polyaromatic structures on surfaces of lignocellulosic material (LCM). IR absorption spectra of dioxane lignin obtained from the initial and ozonated wood samples confirm the different direction of lignin transformations, depending on the content of moisture in the wood.
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Mamleeva, N.A., Kharlanov, A.N. & Lunin, V.V. Features of Lignin Destruction in Wood under the Action of Ozone. Russ. J. Phys. Chem. 94, 1780–1785 (2020). https://doi.org/10.1134/S0036024420090186
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DOI: https://doi.org/10.1134/S0036024420090186