南京林业大学学报（自然科学版）Issue(2)：143-147,5.DOI:10.3969/j.issn.1000-2006.2015.02.025
热处理对木材吸湿特性及尺寸稳定性的影响
Effects of heat treatment on the moisture adsorption characteristic and dimensional stability of wood
摘要
Abstract
Heat treatment of Pinus sylvestris and Quercus mongolica boards were carried out in atmospheric stream or 0�45 MPa pressurized steam. Hygroscopicity and dimensional stability of the treated wood were compared with the con⁃trol. The results showed that heat treatments not only lowered the equilibrium moisture contents ( EMC) of the wood, but also altered the pattern of its moisture adsorption in high humidity environment. When the environmental relative humidity increased from 69% to 94%, the EMC change rates of the heat treated samples were just one third of those of the control samples. This might be attributed to the reconstruction of wood cell wall during the heat treatments. Dimen⁃sional stability of heat treated samples was significantly improved as a result. The radial and tangential swelling of pres⁃surized⁃steam treated Pinus sylvestris samples decreased by 34% and 47% compared to those of the control ones. For Quercus mongolica samples, the corresponding values were 46% and 51%. Most tangential anti⁃swelling efficiency ( ASE) values of the heat treated samples were higher than their radial ASE values. That means swelling difference be⁃tween radial direction and tangential direction was also reduced after heat treatments. It was also showed that pressurized steam induces more pronounced property modification than atmospheric steam.关键词
木材热处理/蒸汽压力/吸湿性/尺寸稳定性Key words
wood heat treatment/steam pressure/moisture sorption/dimensional stability分类
农业科技引用本文复制引用
丁涛,顾炼百,蔡家斌..热处理对木材吸湿特性及尺寸稳定性的影响[J].南京林业大学学报（自然科学版）,2015,(2):143-147,5.基金项目
国家林业局“948”项目（2011－4－12）；江苏高校优势学科建设工程资助项目（PAPD）；南京林业大学公派出国专项留学基金项目 （）
