【摘要】 以樟子松为原料，采用正交试验法，研究了不同木材含水率（10%、20%、30%）、高温热处理温度（180、200、220℃）、处理时间（2、3、4 h)三个因素对樟子松处理前后弦向干缩性和湿胀性、吸水性、密度的影响，以及樟子松高温热处理时，被处理材含水率、处理温度与处理时间的优化组合。结果表明：较高初始含水率、较高热处理温度和较长高温处理时间可改善木材的干缩性和湿胀性，使木材尺寸稳定性更好；在较剧烈的热处理条件下，初始含水率的大小不会影响热处理材密度降低的趋势；热处理温度、时间和含水率对吸水性的影响不呈线性关系。更多还原

【Abstract】 In this paper, the impact of three factors, including moisture content(10%、20%、30%),treatment temperature(180, 200, 220 ℃) and treatment time(2, 3, 4 h) on the tangential shrinkage, tangential moisture-absorbing expansion, water absorption and density of the high temperature heat treated Pinus sylvestnis var. mongolica Litv. were investigated by using the orthogonal experiment method. The optimal combination of the moisture content, temperature and time for the high temperature heat treatment of Pinus sylvestnis var.mongolica Litv. was studied. The result showed that higher initial moisture content, higher heat treatment temperature and longer treatment time could improve the dry shrinkage and wet expansion of the heat treated wood, and made the dimensional stability better. The initial moisture content does not affect the decreasing trend of heat treated wood density at severe heat treatment conditions. The effect of heat treatment temperature, time and moisture content on water absorption was not linear.更多还原