촉매이용열처리 활엽수재의 내후성 평가
Evaluation of Decay Resistance for Heat-treated Hardwood Using the Catalyst(H2SO4)
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초록
본 연구는 촉매이용열처리 활엽수의 심·변재 구분에 따른 내후성 효과를 평가하기 위하여 실시하였다. 졸참나무, 구실잣밤나무, 백합나무를 심재와 변재로 구분한 시험편을 7.5%의 촉매제에 10분간 침지하여 열처리 장치에서 130℃에 90분간 열처리 후 백색 부후균(Trametes versicolor)을 사용하여 활엽수 심재와 변재의 내후성을 조사하였다. 촉매이용열처리 후 모든 조건에서 목재의 중량과 밀도가 약간감소하는 경향을 나타내었다. 부후처리 후 무처리와 비교하여 촉매이용열처리에서 낮은 중량감소율이나타났으며, 수종별 비교에서는 졸참나무의 촉매이용열처리 변재에서 가장 낮은 중량감소가 나타났다. 촉매제를 이용한 열처리법은 부후균에 의한 목재의 부후저항을 효과적으로 증가시켰다.
Abstract
This study was conducted to evaluate the resistance of heat-treated wood using the catalyst todecay caused by fungi for sapwood and heartwood of three hardwood species, Quercus serrata,Castanopsis cuspidata, and Liriodendron tulipifera, respectively. Wood samples were immersedfor 10 min in sulfuric acid(7.5%) and then heat-treated at 130℃ for 90 min. Then, thewhite-rot fungus was used to examine the decay resistance of hardwood. Weight and density ofwood from the all conditions decreased after heat treatment using the catalyst. Weight loss afterdecay resistance test was also dropped with a heat treatment. The lowest weight loss indicatedat heat-treated heartwood of Quercus serrata. Heat treatment using the catalyst effectivelyincreased the resistance of wood to decay caused by the white-rot fungi.
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