Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Evaluation of Deterioration of Larix kaempferi Wood Heat-treated by Superheated Steam through Field Decay Test for 12 Months

12개월 야외 내후성 시험에 의한 과열증기 열처리된 낙엽송재의 열화 평가

  • Park, Yonggun (Department of Forest Sciences, College of Agriculture & Life Sciences, Seoul National University) ;
  • Han, Yeonjung (Department of Forest Products, National Institute of Forest Science) ;
  • Park, Jun-Ho (SDI R&D Center, Samsung SDI Co., LTD.) ;
  • Chung, Hyunwoo (Department of Forest Sciences, College of Agriculture & Life Sciences, Seoul National University) ;
  • Kim, Hyunbin (Department of Forest Sciences, College of Agriculture & Life Sciences, Seoul National University) ;
  • Yang, Sang-Yun (Department of Forest Sciences, College of Agriculture & Life Sciences, Seoul National University) ;
  • Chang, Yoon-Seong (Department of Forest Products, National Institute of Forest Science) ;
  • Yeo, Hwanmyeong (Department of Forest Sciences, College of Agriculture & Life Sciences, Seoul National University)
  • Received : 2018.05.04
  • Accepted : 2018.09.07
  • Published : 2018.09.25
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Abstract

In this study, the decay resistance of larch wood, which was heat treated by superheated steam, was evaluated by the field decay test. During the field decay test of 12 months, non-treated wood has been severely damaged by termite, however, no visible damage has occurred in the preservative-treated wood and superheated steam heat-treated wood. Results of field decay test showed approximately 5% mass loss of the non-treated wood and the preservative-treated wood, and approximately 1% mass loss of the superheated steam heat-treated wood. After the field decay test for 12 months, the residual amount of preservatives remaining in the preservative-treated wood was lower than that before the field decay test. It was considered that the preservative was partially eluted during the field decay test, and the mass loss of the preservative-treated wood was thought to be similar to that of the non-treated wood. Through this study and additional long-term monitoring test, superheated steam heat treatment can be considered to be an environmental-friendly method to enhance the decay resistance of wood against rot fungi and/or insect without chemical treatment such as preservative injection.

본 연구에서는 과열증기를 이용하여 열처리한 낙엽송재의 야외 내후성 시험을 통해 부후균과 해충에 대한 저항성을 평가하였다. 12개월간 진행된 야외 내후성 시험 결과, 무처리재는 흰개미에 의한 피해가 두드러지게 나타났지만 방부목재와 과열증기 열처리재에서는 육안으로 관찰되는 피해는 발견되지 않았다. 무처리재와 방부목재는 약 5%의 질량 감소를 보였으며, 과열증기 열처리재는 약 1%의 질량 감소를 보였다. 야외 내후성 시험이 진행된 후 방부목재에 남아있는 방부약제의 함량이 야외 내후성 시험 전보다 감소한 것으로 보아 야외 내후성 시험이 진행되는 동안 방부약제가 일부 용출된 것으로 보이며, 이에 따라 방부목재의 질량 감소가 무처리재와 유사한 수준으로 나타난 것으로 생각되었다. 과열증기를 이용한 열처리는 방부약제 주입과 같은 화학적인 처리 없이 친환경적으로 목재의 부후균과 해충에 대한 저항성을 개선시킬 수 있는 가능성이 확인되었으며, 이를 위하여 장기적인 관찰이 추가적으로 필요할 것이라 생각된다.

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