文献类型：期刊文献

英文题名：EFFECT OF STEAM-HEAT TREATMENT ON MECHANICAL PROPERTIES OF CHINESE FIR

作者：Cao, Yongjian[1,2,3,4] Lu, Jianxiong[1,2] Huang, Rongfeng[1,2] Zhao, Xiu[1,2] Jiang, Jiali[1,2]

第一作者：Cao, Yongjian

通信作者：Lu, JX[1]

机构：[1]Chinese Acad Forestry, State Forestry Adm, Key Lab Wood Sci & Technol, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[3]Univ New Brunswick, Fac Forestry & Environm Management, Wood Sci & Technol Ctr, Fredericton, NB E3C 2G6, Canada;[4]Guangdong Acad Forestry, Guangzhou 510520, Guangdong, Peoples R China

年份：2012

卷号：7

期号：1

起止页码：1123-1133

外文期刊名：BIORESOURCES

收录：;EI(收录号：20121414918423);Scopus(收录号：2-s2.0-84859074676);WOS:【SCI-EXPANDED(收录号:WOS:000304041200089)】；

基金：This research was funded by the National Natural Science Foundation of China (No. 30825034).

语种：英文

外文关键词：Chinese fir; Heartwood; Sapwood; Steam-heat treatment; Hardness; Modulus of elasticity; Modulus of Rupture

摘要：Heat treatment often brings about some negative effects on mechanical properties of wood. Chinese fir is currently underutilized due to some inherent properties that limit its further applications. Using steam as a heating medium and a shielding gas, the heartwood and sapwood of Chinese fir were treated at a temperature ranging from 170 degrees C to 230 degrees C and time from 1 to 5 hours in an airtight chamber. Both the modulus of rupture (MOR) and modulus of elasticity (MOE) were increased for the sapwood specimens under the temperature less than 200 degrees C for short treatment times. The hardness was increased for both two kinds of specimens under the temperature less than or about 200 degrees C, compared to the untreated specimens. The temperature has a stronger effect on mechanical properties of wood than the time, and the temperature of 200 degrees C is a critical point in modifying mechanical properties of wood.