抽提物对木材渗透性影响的研究

本文研究了我国东北四种常见木材的抽提物对渗透性影响的变化规律,测量了木材抽提前后渗透性的改变,应用电子显微镜观察了木材抽提后微观结构的变化,分析和探讨了未材抽提对渗透性影响的机理。结果表明,木材经过四种方法的抽提以后渗透性均有不同程度的提高。木材渗透性的提高与抽提时间成线性关系。抽提改善了木材内部流体流动的通路,提高木材渗透性的内在原因是除去了纹孔膜上的结壳物质。

EFFECT OF WOOD ABSTRACT ON PERMEABILITY

In this paper, the relationship between the permeability of Pinus koraiensis, Larix dahurica, Betula platyphylla, Populus davidiana and the abstract of wood was studied. The permeability variation was measured before and after the samples were abstracted, mierostructure of wood were analysed by scanning of electron microscope and the effect mechanism of wood abstract on wood permeability was discussed. The result showed that wood permeability of four kinds of wood have been improved after abstracting, it is linear relationship between the improving permeability and abstracting time. The flow passage of fluid in wood was fluent, and the inherent factors of improving wood permeability is removing off the deposition on pit membrance.