文献类型：期刊文献

英文题名：Effects of preheating temperature, preheating time and their interaction on the sandwich structure formation and density profile of sandwich compressed wood

作者：Wu, Yanmei[1] Qin, Li[2] Huang, Rongfeng[1] Gao, Zhiqiang[1,3] Li, Ren[1,3]

第一作者：Wu, Yanmei

通信作者：Huang, RF[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Key Lab Wood Sci & Technol, Natl Forestry & Grassland Adm, Beijing 100091, Peoples R China;[2]Natl Forestry & Grassland Adm, Planning & Design Inst Forest Prod Ind, Beijing 100714, Peoples R China;[3]Beijing Forestry Univ, Coll Mat Sci & Technol, Beijing 100083, Peoples R China

年份：2019

卷号：65

期号：1

外文期刊名：JOURNAL OF WOOD SCIENCE

收录：;EI(收录号：20191006605890);Scopus(收录号：2-s2.0-85062553197);WOS:【SCI-EXPANDED(收录号:WOS:000460655800001)】；

基金：This research was sponsored by the National Natural Science Foundation of China (Grant No. 31670557).

语种：英文

外文关键词：Sandwich compression; Preheating temperature-time interaction; Position of the compressed layer; Structural formation; Density profile

摘要：Effects of preheating times (4, 8, and 12min), preheating temperatures (75-210 degrees C, with 15 degrees C interval), and their interactions on structures and density profiles of sandwich compressed poplar wood (Populusxeuramericana cv. Neva') were studied to achieve better control of the position(s) of compressed layer(s), with the aim of better utilization of the low-density wood resources. Our findings revealed that, as a result of preheating temperature elevation or preheating time extension, compressed layers move gradually from wood surfaces to wood interior center, forming three types of sandwich compressed wood, namely, surface compressed wood, internal compressed wood, and central compressed wood. The characteristics of wood cell deformation in the sandwich compressed wood match well with the density distribution, and no obvious cell-wall cracks were observed. Effects of preheating temperature, preheating time, and preheating temperature-time interaction on the density of the compressed layer(s) are statistically insignificant. But their effects on the position and thickness of the compressed layer(s) in the sandwich compressed wood were statistically highly significant (p<0.001), and the preheating temperature and compressed layer(s) positions were significantly related to the functions and fitted the polynomial of the fourth order.