文献类型：期刊文献

英文题名：Effect of Mechanical Restraint on Drying Defects Reduction in Heat-treated Okan Wood

作者：Hidayat, Wahyu[1,2] Qi, Yue[1,3] Jang, Jae Hyuk[1,4] Febrianto, Fauzi[5] Kim, Nam Hun[1]

第一作者：Hidayat, Wahyu

通信作者：Kim, NH[1]

机构：[1]Kangwon Natl Univ, Dept Forest Biomat Engn, Coll Forest & Environm Sci, Chunchon 24341, South Korea;[2]Univ Lampung, Dept Forestry, Fac Agr, Jl Sumantri Brojonegoro 1, Bandar Lampung 35145, Indonesia;[3]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[4]Natl Inst Forest Sci, Dept Forest Prod, Seoul 02455, South Korea;[5]Bogor Agr Univ, Dept Forest Prod, Fac Forestry, Gd Fahutan Kampus IPB Dramaga, Bogor 16680, Indonesia

年份：2017

卷号：12

期号：4

起止页码：7452-7465

外文期刊名：BIORESOURCES

收录：;EI(收录号：20173604136594);Scopus(收录号：2-s2.0-85028756838);WOS:【SCI-EXPANDED(收录号:WOS:000422879900041)】；

基金：This work was performed with the support of a research grant provided by the Korea Forest Service (Project No: S121212L150100).

语种：英文

外文关键词：Clamping; Cylicodiscus gabunensis; Drying defects; Heat treatment

摘要：Mechanical restraint through the use of clamps was applied as an attempt to prevent drying defects during the heat treatment of high-density wood. Boards of okan (Cylicodiscus gabunensis (Taub.) Harms) with the initial moisture content of 8.99% and 9.68% for sapwood and heartwood, respectively, were prepared. The boards were heat-treated under an oxygen atmosphere at the peak temperatures of 160 degrees C, 180 degrees C, 200 degrees C, and 220 degrees C with a residence time of 2 h. The occurrence of drying defects as checks (i.e., surface and end checks) and warps (i.e., bow, cup, and twist) were evaluated. Heat treatment stimulated the occurrence of drying defects in okan wood. The results revealed that the surface checks, end checks, and twists increased linearly with increased temperature. The occurrence of warps, such as bow and cup, after heat treatment was relatively low. Heartwood showed a higher degree of drying defects compared to the sapwood. Application of mechanical restraint by clamping efficiently decreased the occurrence of drying defects of okan wood, particularly surface checks, end checks, and twists.