高温过热蒸汽处理木材的吸湿解吸特性  

Moisture Absorption and Desorption Characteristics of Superheated Steam-Treated Wood under High Temperature

作　　者：齐华春[1,2] 刘一星[1] 程万里[1] 

机构地区：[1]东北林业大学生物质材料科学与技术教育部重点实验室,哈尔滨150040 [2]北华大学,吉林132013

出　　处：《林业科学》2010年第11期110-114,共5页Scientia Silvae Sinicae

基　　金：国家自然科学基金资助项目(30871981)部分内容

摘　　要：以日本柳杉为试材,经温度为140,160,180℃,相对湿度为0,60%,100%过热蒸汽处理后,考察并分析其在不同环境温度和相对湿度条件下的吸湿解吸特性和吸湿滞后现象。结果表明:高温过热蒸汽处理木材的水分吸着等温线的类型没有发生变化;吸湿、解吸过程中,在同一环境湿度下,高温高湿处理后木材的水分吸着量低于低温处理后木材的水分吸着量;水分吸着量随处理木材温度和相对湿度的增高呈减少趋势;处理前后的木材均有吸湿滞后现象;高温高湿处理后木材的吸湿滞后现象比低温条件处理木材的吸湿滞后现象明显。Specimens from Japanese Sugi（Cryptomeria japonica）wood was treated with superheated steam under the temperature of 140,160,180 ℃ and the relative humidity（RH）of 0,60%,100% to investigate the moisture absorption and desorption characteristics and moisture absorption hysteresis phenomenon of treated wood under different environmental temperature and RH.The results showed that the type of the isotherm of the wood treated under high temperature superheated steam was not changed,that under the same environmental humidity,the amount of moisture sorption of the wood under high temperature and RH was lower than that of specimen under low temperature during moisture absorption and desorption process,that the amount of moisture sorption of the wood presented a trend of decreasing with the increasing temperature and RH,and that all specimens showed a hysteresis phenomenon of the moisture absorption,especially for the specimen under high temperature and RH.

关 键 词：高温过热蒸汽处理 木材 吸湿解吸特性 

分 类 号：S781.71[农业科学—木材科学与技术]