ENHANCED PERMEABILITY OF EUCALYPTUS CLOEZIANA BASED ON NAOH/Na2SO3 AND H2O2 TREATMENTS

The synergistic effects of NaOH/Na2SO3 and H2O2 treatments on enhancing the permeability of Eucalyptus cloeziana wood were investigated. Treated and untreated specimens were analysed for pore size, microstructure, and chemical composition. The results showed that the treated wood had significantly increased average pore sizes and was characterised by cracks in the wood pits. Additionally, the contents of hemicelluloses and lignin structural components decreased, enhancing permeability. The treated wood showed a 1.2- to 1.8-fold water absorption rate higher than untreated wood. These changes result from the reaction of NaOH/Na2SO3 and H2O2 with wood.