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탄산칼륨과 염화칼슘을 이용한 무기질 복합화 목재 중에 있어서 무기염의 생성과 방부효력
이종신,윤선미 한국목재공학회 2001 목재공학 Vol.29 No.2
This research is carried out to investigate the formation and preservative effectiveness of inorganic substance, calcium carbonate(CaCO₃), in wood. The specimens were prepared by the impregnation with saturated solutions of potassium carbonate(K₂CO₃) into the wood followed by precipitation in saturated solutions of calcium chloride(CaCl₂) for 24h, 72h and 120h, and then they were leached in instrument flowing with water for 24h. The weight percent gains of K₂CO₃solution impregnated specimens reached approximately a maximum value (108.1%) by 72h precipitation in CaCl₂solutions. Inorganic substances were observed to he produced in the lumina of tracheids of specimens. From these inorganic substances filling in the tracheids, characteristic X-rays of calcium(Ca-K_α) were detected by energy dispersive X-ray analyzer. Moreover. it was shown from a leaching treatment that these substances could not he leached easily from the specimens. Therefore, they were could be considered to be insoluble calcium carbonates. The weight losses of the prepared specimens were hardly occurred by test fungi attacks. Thus inorganic substances in specimens can be said to have preservative effectiveness.
Monoethylene Glycol 계 수지액을 주입한 소나무재에 있어서 수지성분의 분포와 방부효과
이종신 한국목재공학회 1995 목재공학 Vol.23 No.2
With the aim to utilize pine wood(Pinus densiflora Sieb. et Zucc.) as an interior building materials, such as flooring material, monoethylene glycol(MEG) resin solution was impregnated into greenwood. Specimens of three different qualities, that is, normal wood, resinous wood and compression wood, were prepared. Distribution of resin element(phosphorus) in MEG resin solution-impregnated woods and preservative effectiveness against brown rot fungi(Tyromyces palustris and Serpuia tacrymans) of these woods were investigated. The results were as follows: 1. The concentration of phosphorus into cell walls of resinous wood and compression wood was lower compared to that of normal wood. This shows that the quality of wood has an influence on the penetration of MEG resin solution into the wood, It was shown from a leaching test that MEG resin could be leached out easily from the cell walls. 2. The resinous wood and compression wood, even without MEG resin solution impregnation had high decay resistance. For normal wood, significant improvement of preservative effectiveness was observed after impregnation of MEG resin solution. It was shown that MEG resin was leached out from the woods after leaching test, resulting in the reduction of preservative effectiveness. From this result, suitability of MEG resin solution-impregnated woods as an interior materials was recognized.
輸入針葉樹 4數種의 耐朽性 및 CCA系 木材防腐劑 處理에 따른 防腐效果
李鍾信,金永植,韓基善 충남대학교 농업과학연구소 1995 농업과학연구 Vol.22 No.1
With the aim to investigation of decay resistance and optimum concentration in chrome-copper-arsenic(CCA) preservative treatment on the imported softwoods from Siberia and North america, preservative absorption after CCA impregnation, weight losses and degradation patterns by decay fungi were examined. The density and latewood rate of Siberia softwoods(Spruce and Larch) were higher than those of North america softwoods(Douglas-fir and Western hemlock), resulting in the decrease of the CCA preservative absorption in the Siberia softwoods. In the case of untreated softwoods, decay resistance against Coriolus versicolor was lower than against Tyromyces palustris. For CCA treated softwoods, preservative effectiveness increased with increase in concentration of CCA solution. When treated with 0.7% CCA solution, efficiency value was more than 80 and 90 for C. versicolor and T. palustris, respectively. From this results, in the CCA preservative treatment for imported softwoods, it can be concluded that optimum concentration of CCA solution is approximately 0.7%. The absorption of CCA preservative distributed in the range of 3.8 and 5.5 kg/㎥. After exposure to testing fungi, in the untreated softwoods, bore holes formed in the cell walls and bordered pits, moreover, bordered pit canals enlarged by the fungi. However, 0.5% CCA treated softwoods was almost no deterioration in the cell walls and bordered pits due to decay.