The improvement in biodurability of thermally modified materials is due to the following reasons
The improvement in biodurability of thermally modified materials is due to the following reasons
-During the thermal degradation of wood, acidic substances such as acetic acid and formic acid are generated, which affects the metabolic process of decay bacteria in the heat-treated wood, thus enhancing the corrosion resistance.
-During the thermal degradation of wood, a variety of phenolic compounds are generated, and vanillin can prevent or delay the growth of decay bacteria.
-The increase in the proportion of cellulose crystalline areas limits or delays the degradation of long cellulose molecular chains by non-enzymatic oxidants and the diffusion of soluble oligosaccharides or monosaccharides into the wood cell cavity.
-The increase of lateral connections in the lignin network hinders the reaction of non-enzymatic oxidants and the degradation of lignin by lignolytic enzymes.
-The reduction of hygroscopicity and water absorption of thermally modified materials is also not conducive to the parasitism and reproduction of decay fungi.
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