文献类型：期刊文献

英文题名：Radial cracks in Castanopsis hystrix wood and its dimensional stability improvement by resin-impregnated modification

作者：Meng, Surong[1] Su, Yingying[1] Huang, Anmin[1] Sun, Bailing[1]

第一作者：Meng, Surong

机构：[1] Research Institute of Wood Industry, Chinese Academy of Forestry, Qing Long Qiao, Dong Xiao Fu No. 1, Hai Dian District, Beijing, 100091, China

年份：2023

外文期刊名：Holzforschung

收录：EI(收录号：20234715092508);Scopus(收录号：2-s2.0-85177190987)

语种：英文

外文关键词：Metabolism - Resins - Scanning electron microscopy - Stability - Urea - Urea formaldehyde resins

摘要：This study investigated the characteristics of radial cracks in Castanopsis hystrix wood and evaluated its dimensional stability after impregnation with low-molecular-weight polyacrylate (PA), melamine-urea-glyoxal (MUG), and melamine-urea-formaldehyde (MUF) resins. The physical properties were examined by dimensional stability measurements, dynamic vapor sorption (DVS) analysis, and scanning electron microscopy (SEM). The results showed that radial cracks were easily produced in the transverse section of untreated wood during drying. The surfaces of the radial cracks exhibited an even and clean structure without fluffs on the pair of surfaces, and cracks spanned 4-5 annual rings. The resin-impregnated wood showed no radial cracks on its transverse surface. C. hystrix wood modified with MUG and MUF exhibited a higher weight percentage gain (WPG) than wood modified with the same concentration of PA resin. The resin-impregnated C. hystrix wood also showed reduced anisotropy and improved dimensional stability. The SEM images of the modified wood showed that the wood pits and cells were filled with resin, while the cell wall surfaces were covered with a layer of resin. ? 2023 Walter de Gruyter GmbH, Berlin/Boston 2023.