Evaluation of Physico-Mechanical Properties and Durability of Larix kaempferi Wood Heat-Treated by Hot Air

Abstract

This study was carried out to evaluate quantitatively some properties (density, equilibrium moisture content, shrinkage, water vapor adsorption, water absorptivity, compressive strength, bending strength, hardness and decay resistance) of Larix kaempferi lumber which was heat-treated by hot air and has been used commercially in Korea. Equilibrium moisture content of the heat-treated wood was decreased with increase of hydrophobicity. Dimensional stability of the wood was improved with decrease of shrinkage, water vapor adsorption and free water absorptivity. Also, with the thermo-chemical changes of wood component and lower equilibrium moisture content, decay resistance and

Water Absorption and Dimensional Stability of Heat-treated Fast-growing Hardwoods

“…Various methods of wood heat treatment have been investigated, such as hydrothermal processing and steam injection, (Esteves et al, 2008). The effects of super heated steam method of heat treatment on wood properties have been explored by Park et al (2016Park et al ( , 2018. On the other hand, Won et al (2017) used sulfuric acid (7.5%) immersion as a catalyst before heat treatment at 130 °C for 90 minutes that improved the decay resistance of Korean red pine (Pinus densiflora) and Japanese larch (Larix kaempferi) woods from brown rot fungus (Fomitopsis palustris).…”

Effect of Heat Treatment and Particle Size on the Crystalline Properties of Wood Cellulose

“…목재의 열처리는 고온가열로 목재성분의 열분해 수준을 조절하면서 화학적 성분 변화를 유도하여 치수안정성 및 내후성 증대 등을 목표로 하는 가공방법이다 (Kim, 2016). 열처리에 의한 목재의 특성 변화에 관한 연구는 다수 보고되어 왔다 (Čermák and Dejmal, 2013;Tu et al, 2014;Park et al, 2015;Chung et al, 2016;Gong et al, 2016;Hidayat et al, 2016;Lee and Kim, 2016;Jang et al, 2017;Hidayat et al, 2016;Won et al, 2017;Park et al, 2018). 목재를 열처리하면 추출물이 제거되고, 헤미셀룰로오스가 분해되며 셀룰로오스와 리그닌의 변화가 일어나는데, 열처리에 의한 목재의 재색변화는 헤미셀룰로오스의 감소에 의한 것으로 추정된다 (Kim, 2016;Garrote et al, 1999).…”

“…Heat treatment of wood is a type of polishing method that produces dimensional stability and increases weather resistance by controlling the wood's thermal degradation and changing its chemical composition (Kim, 2016). Several studies have reported heat-induced changes in wood properties (Čermák and Dejmal, 2013;Tu et al, 2014;Park et al, 2015;Chung et al, 2016;Gong et al, 2016;Hidayat et al, 2016;Lee and Kim, 2016;Jang et al, 2017;Hidayat et al, 2016;Won et al, 2017;Park et al, 2018).…”

Evaluation of Deterioration of Larix kaempferi Wood Heat-treated by Superheated Steam through Field Decay Test for 12 Months

“…목재 열처리는 친환경적인 방부ㆍ방충 처리 방법으로 2000년대 초반부터 유럽을 중심으로 다양한 연구가 수행되고 있다. 열처리된 목재는 표면 재색이 어둡게 변하고, 소수성이 증가함에 따라 치수 안정성이 개선되며, 내후성이 증가하 는 것으로 알려져 있다 (Repellin and Guyonnet, 2005;Esteves et al, 2008;Yoon et al, 2008;Park et al, 2012;2014;2015;. 이러한 물성 변화로 인해 열처리 목재는 정원용 가구, 울타리, 기둥, 목재수납장, 창문틀, 도어, 가구, 데크재, 외장벽판재 및 마루판 등 치수안정성이나 내후성이 요구되는 다양한 용도에 적용 가능한 것으로 소개되고 있다 (Esteves and Fereira, 2009;Kim, 2016).…”

“…Various research on wood heat treatment as an environmental-friendly preservative and insect-proof process since the early 2000s has been conducted mainly in Europe. It has been reported that the color of heat-treated wood turns darker, its dimensional stability improves as the hydrophobic property increases, and its weatherproof performance increases (Repellin and Guyonnet, 2005;Esteves et al, 2008;Yoon et al, 2008;Park et al, 2012;2014;2015;. Thanks to such property changes, heat-treated wood is considered to be widely used for garden furniture, fences, pillars, wood storage closets, window frames, doors, furniture, deck materials, outdoor wall materials and flooring materials where dimensional stability or weatherproof performance is required (Esteves and Fereira, 2009;Kim, 2016).…”