Effect of Air Heat Treatment on the Color Change and Weight and Density Loss of Six Korean Oak Woods

Authors

  • Denni Prasetia Department of Forest Biomaterials Engineering, College of Forest and Environmental Science, Kangwon National University, Chuncheon 24341 Republic of Korea https://orcid.org/0000-0003-2151-0555
  • Byantara Darsan Purusatama Institute of Forest Science, Kangwon National University, Chuncheon 24341, Republic of Korea
  • Alvin Muhammad Savero Department of Forest Biomaterials Engineering, College of Forest and Environmental Sciences, Kangwon National University, Chuncheon 24341, Republic of Korea
  • Jong-Ho Kim Department of Forest Biomaterials Engineering, College of Forest and Environmental Sciences, Kangwon National University, Chuncheon 24341, Republic of Korea
  • Seung-Hwan Lee Department of Forest Biomaterials Engineering, College of Forest and Environmental Sciences, Kangwon National University, Chuncheon 24341, Republic of Korea
  • Byung-Ho Park Department of Living Art Design, College of Design, Kangwon National University, Samcheok 25913, Republic of Korea
  • Apri Heri Iswanto Department of Forest Products Technology, Faculty of Forestry, Universitas Sumatera Utara, Medan 20155, Indonesia
  • Nam-Hun Kim Department of Forest Biomaterials Engineering, College of Forest and Environmental Sciences, Kangwon National University, Chuncheon 24341, Republic of Korea

Keywords:

Air heat treatment, Color change, Oak wood, Quercus spp., Weight and density loss

Abstract

The effects of air heat treatment were evaluated on six Korean oak woods: Quercus serrata (Qs), Quercus mongolica (Qm), Quercus acutissima (Qac), Quercus aliena (Qal), Quercus dentata (Qd), and Quercus variabilis (Qv). Color change (ΔE*), weight loss, and density loss were examined using flat-sawn heartwood boards before and after treatment at 160 °C, 180 °C, 200 °C, and 220 °C for 2 h. Overall, the ΔE*, weight loss, and density loss increased with temperature. The properties between temperature and species showed distinct differences. A change to a darker color was observed in all species after treatment at 200 °C. Qm and Qd exhibited the highest and lowest L*, a*, and b* values after treatment at 220 °C, respectively. The highest ΔE* values were obtained in Qd at 160 °C, Qs at 180 °C and 200 °C, and Qv at 220 °C. Qd and Qv exhibited the highest and lowest weight losses at 160 °C, respectively. Qac and Qal showed the highest and lowest weight losses at 220 °C, respectively. Qm showed the highest density loss at all temperatures, whereas Qs had the lowest at 160 °C, and Qac had the lowest values at 180 °C, 200 °C, and 220 °C.

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Published

2024-07-26

Issue

Vol. 19 No. 3 (2024)

Section

Research Article or Brief Communication