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本文通过对长白鱼鳞云杉和臭冷杉生材分别进行普通气干处理和酒精置换处理以及对其气干材进行水浸处理 ,研究了这 3种不同处理方法对木材气体渗透性的影响及其影响机理。研究结果表明 ,长白鱼鳞云杉边材、心材和臭冷杉心材的生材经普通气干处理后 ,其气体渗透性较低 ,分别约为 0 1 1 4、0 0 4 5和0 1 1 1darcy ;长白鱼鳞云杉边材、心材和臭冷杉心材的生材经酒精置换处理后 ,其气体渗透性分别约为1 1 71 3、0 0 74和 0 1 4 4darcy,比普通气干处理对照组试样的平均渗透性分别增加约 1 0 1 5倍、62 %和 3 0 % ,t检验表明 ,前者差异非常显著 ,但后两者差异不显著 ;已气干 1 8个月的长白鱼鳞云杉边材、心材和臭冷杉心材经水浸处理后 ,其平均气体渗透性较处理前分别增加约 85%、4 9%、65 5% ,t检验表明差异均显著。长白鱼鳞云杉生材边材经酒精置换处理后 ,其平均气体渗透性较普通气干处理试样的平均气体渗透性显著增加的主要原因 ,是经酒精置换干燥后其纹孔的闭塞率基本上保持同生材状态时一样低 ,绝大多数纹孔仍处于开放的中间位置的结果 ,其次一部分浸提物在置换过程中被浸提出也可能是个原因 ;长白鱼鳞云杉生材心材和臭冷杉生材心材经酒精置换处理后其平均气体渗透性较普通气干处理试样的平均气体渗
In this paper, the general air-dry treatment and ethanol replacement treatment of Pseudostellaria fortunei and Fir firwood were carried out, and their air-dried wood was flooded, the effects of these three different treatments on wood gas permeability and their Impact mechanism. The results showed that the gas permeability of the raw materials of sapwood, heartwood and fir heartwood of Picea crassifolia was lower after air-drying, which were about 0 1 1 4,0 0 4 5 and 0 1 1 1 darcy After the ethanol replacement treatment, the gas permeability of the raw materials of P. longiflorus sapwood, heartwood and fir heartwood were about 1 1 71 3 0 0 74 and 0 1 4 4 darcy, respectively, The average permeability of the sample increased by about 1 0 1 5 times, 62% and 30% respectively. The t test showed that the difference between the former and the latter was not significant. The average gas permeability of Phyllostachys edulis, heartwood and Fir fir heartwood increased by about 85%, 49%, 655%, respectively, compared with that before treatment. The t test showed that the differences were significant. The main reason for the significant increase of the average gas permeability of P. sakota spruce raw sapwood after ethanol replacement was that the average gas permeability of the sample was significantly increased after ethanol replacement, On the other hand, as low as the same state of raw materials, most of the pits are still in the middle of the open results, followed by a part of the extract in the process of being leached may also be a reason; The average gas permeability of the fir wood core material after alcohol replacement treatment is lower than that of the ordinary air-dried sample