Strength Properties, Thermal Stability, and Microstructure of Acetylated Obeche (Triplochiton Scleroxylon K. Schum) Wood

Abstract Acetylation is a well-established process to improve dimensional properties of wood and resistance to fungi attack. This study was carried out due to limited studies on its effect on mechanical properties, thermal stability, and microstructural aspects of wood. Wood blocks, (each 20×20×60 mm) of Obeche were acetylated with acetic anhydride at 120°C for 60, 120, 180, 240 and 300 minutes. The microstructure and thermal stability of acetylated and unmodified wood blocks were assessed using SEM and TGA, respectively. The Maximum compressive strength (MCS//g) and Modulus of Elasticity (MOE) of the wood specimens were also determined. The SEM indicated no visible damage or defect in the microstructure of all the acetylated wood and no significant differences in the strength properties compared to untreated wood. Acetylated wood showed an increased thermal stability compared to unmodified wood.