Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Research Trend of The Heat-Treatment of Wood for Improvement of Dimensional Stability and Resistance to Biological Degradation

목재의 치수안정성과 내후성 개선을 위한 열처리 가공에 관한 연구 동향

  • Kim, Yeong-Suk (Department of Forest Products and Biotechnology, College of Forest Science, Kookmin University)
  • 김영숙 (국민대학교 임산생명공학과)
  • Received : 2016.03.01
  • Accepted : 2016.05.18
  • Published : 2016.05.25
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Abstract

This was investigated on the major issues and research trends regarding the heat-treatment of woods through literature reviews. The principal heat-treatment technologies utilized for industrial purposes include the Plato-process (Netherlands), the Retification process (France), the OHT-process (Germany), and the Thermowood Process (Finland). Factors that mainly influence the heat-treatment process are the wood species, process temperature, processing time, and the heating medium (air, steam, vacuum, N2, oil, etc.). Researches on investigating the optimal conditions with these process conditions being the variables stand as the mainstream. Heat-treated woods present dimensional stability improvement, but mass loss and strength reduction, a wide variations for decaying inhibition, and insufficient resistance against mold, wood borer, and termites. For further improvement in respects of durability or resistance to biological degradation, necessity to search for more suitable heat treatment process and processing conditions fit for each wood species has been suggested. Exploiting new ways to utilize heat-treated wood and extending its range of use have been considered to be important matters that need more effort put into for the sustainable and sound environment as well as saving the wood resources.

본 연구에서는 목재의 열처리가공에 대하여, 문헌 연구를 통하여 이와 관련된 주요 이슈 및 기술 동향을 조사하였다. 산업적으로 이용되는 주요 열처리기술은 네덜란드의 Plato-process, 프랑스의 Retification process, 독일의 OHT-process, 및 핀란드의 Thermowood process 등이었다. 열처리 공정상의 주요 영향인자들은 대상 수종, 가열 온도, 시간, 열전달 매질(air, 증기, 진공, 질소, 오일 등)이며, 이들 인자들을 변수로 한 최적조건 탐색 등의 연구가 주류를 이룬다. 열처리 목재는 치수안정성 증가, 중량 및 강도 감소, 부후균에 대한 내후성 향상에 변이, 변색균 및 해충에 대해 불충분한 저항성 등의 특징을 가진다. 열처리 목재의 내후성 향상을 위해 각 수종에 적합한 열처리 공정과 처리조건 탐색의 필요성이 시사되었다. 지속가능한 환경보존 및 목재자원 절약을 위해 열처리 목재의 새로운 용도 개발 및 이용 확대 노력이 반드시 필요한 과제인 것으로 고찰되었다.

Keywords

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