EFFECT OF OIL HEAT TREATMENT PARAMETERS ON MECHANICAL AND PHYSICAL PROPERTIES OF ACACIA HYBRID WOOD
DOI:
https://doi.org/10.70169/VJFS.1093Keywords:
Acacia mangium × Acacia auriculiformis, oil heat treatment, natural oleoresin, mechanical and physical properties, waste cooking oilAbstract
This study investigated the effects of treatment conditions on the equilibrium moisture content (EMC), water-repellent efficiency (WRE), anti-swelling efficiency (ASE), and modulus of rupture (MOR) of acacia hybrid wood (Acacia mangium × Acacia auriculiformis) following heat treatment with a mixture of natural oleoresin and waste cooking oil. The oleoresin, a non-timber forest product derived from Dipterocarpus alatus Roxb., and the waste cooking oil collected from a recycling facility were blended at a mass ratio of 20:80 and used as the heating medium within a temperature range of 150 °C to 190 °C for durations of 60 to 90 minutes. Response surface methodology analysis showed that the developed quadratic regression models had high correlation coefficients, indicating strong agreement with the experimental data. The results showed that EMC decreased by 9.8% to 45.5% compared to the control as the treatment temperature increased. WRE and ASE increased significantly with higher temperature and longer treatment time, reaching maximum values of 28.37% and 48.03%, respectively. Meanwhile, MOR exhibited a slight reduction ranging from 1% to 9.7% compared to the untreated samples. These findings demonstrate that heat treatment using a mixture of natural oleoresin and waste cooking oil significantly improves the dimensional stability of acacia hybrid wood while causing only a minor reduction in its bending strength.
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