The mechanisms of the liquid penetration of wood that based on the continuous observation of the liquid movement into the tracheid of softwood

为明确液体渗透木材的机理，对日木、杉木、北马图三种木材的不同预处理样品（如热水浸提、预压缩处理等）进行了测试，并利用反射光学显微镜上的CCD摄像系统观察了液体的运动。结果表明：1)液体对日木木材的渗透作用由扩散润湿作用转化。2)液体进入气管是通过进气道和进气道的重复运动和停止作用的。3)在吸入力为10kg/cm^2至20kg/cm^2的范围内，液体进入气管的速率发生了显著变化。

To make clear the mechanisms of liquid penetration of wood, it is tested for the various pretreated samples of Hinoki, Sugi and Beimatu (ex. extraction in the hot water and the precompressive treatment and so on), and the liquid movement are observated by the CCD camera system on the reflecting optical microscope.Results obtained are as follow :1)The liquid penetration of Hinoki wood become to be translated by the diffuse wetting.2)The liquid penetration into the tracheid is acted by the repetition of the progress and the stoppage.3)The rate of the liquid movement into the tracheid under the aspiration occurs remarkably change in the range from the force of 10kg/cm^2 to 20kg/cm^2.