Аннотация:Transformations of pine wood under the influence of ozone were studied by thermal analysis in an oxidizing environment. The data of TG / DTG and differential scanning calorimetry (DSC) were analyzed from the point of view of transformations of lignin (LG), hemicelluloses (HC) and cellulose (CL) in wood with different amounts of absorbed ozone. The results of TG / DTG analysis indicate the destruction of hemicelluloses during ozonation of pine wood. Lowering the temperatures of thermal decomposition of LCM obtained from ozonated wood is consistent with a decrease in the LG content and depolymerization of CL during ozonation of biomass. A decrease in the total exothermic effect is observed from H 5.6 kJ / g (source wood) to H 3.6 kJ / g (ozonized wood). The noted changes in thermal properties are associated with the destruction of aromatic and multiple lignin bonds during ozonation, and, possibly, with an increase in the proportion of amorphous cellulose.
URL http://naukarus.ru/public_html/wp-content/uploads/2019/ Scientific%20research%20of%20the%20SCO%20countries%20- %20English%20Reports%20-%20September%2014%20- %20Part%202.pdf#page=103
