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논문 기본 정보

자료유형
학술저널
저자정보
Yunianti, Andi Detti (Faculty of Forestry, Hasanuddin University) Tirtayasa P., Kidung (Faculty of Forestry, Bogor Agricultural Institute) Suhasman, Suhasman (Faculty of Forestry, Hasanuddin University) Taskirawati, Ira (Faculty of Forestry, Hasanuddin University) Agussalim, Agussalim (Faculty of Forestry, Hasanuddin University) Muin, Musrizal (Faculty of Forestry, Hasanuddin University)
저널정보
한국목재공학회 목재공학(Journal of the Korean Wood Science and Technology) 목재공학 제47권 제4호
발행연도
2019.1
수록면
418 - 424 (7page)

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Densification is a process for improving the strength properties of wood from the felling of young trees, which is a common harvest practice in community forests. A series of experiments was conducted to refine the process with particular regard to the determination of suitable pretreatment and treatment conditions. Samples of pine and gmelina measuring $23cm(L){\times}20cm(W){\times}2cm(T)$ underwent pretreatment through immersion in a 1:1 $CH_3COOH-H_2O_2$ solution at concentrations of 15%, 20%, and 30%. Samples pretreated with the 20% solution showed the greatest improvement in strength; further experiments were conducted to determine the optimum treatment conditions in terms of temperature and duration following immersion. Test samples with the same dimensions as those in the pretreatment experiment were soaked in a 1:1 20% $CH_3COOH-H_2O_2$ solution and warmed in a water bath. The test samples were then individually hot pressed to the target thickness, which was 30% less than the original thickness and held at $150^{\circ}C$ or $170^{\circ}C$ for 15 or 30 minutes. The treated samples were cut for an analysis of their density, recovery of set, and bending strength. Pine and gmelina exhibited the best characteristics after treatment at $150^{\circ}C$ for 30 and 15 minutes, respectively. The results suggest that the modified densification process had increased the bending strength of the wood, but the temperature and duration of treatment must be carefully considered for different wood species.

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