Wood Preservation: Improvement of Mechanical Properties by Vacuum Pressure Process
Wood Preservation: Improvement of Mechanical Properties by Vacuum Pressure Process
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木材防腐：通过真空加压工艺改善机械性能
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
A. Rahman
中科院分区：
文献类型：
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作者：
F. Rabbi;M. Islam;A. Rahman
木材作为一种生物制品，如果不加以适当的保护，就容易变质。在役木材变质的主要原因是真菌感染、昆虫（蛀虫和白蚁）、海洋生物和火灾引起的腐烂。通过使用防腐剂对木材进行保护，这些防腐剂可以通过适当设计的保存设备来适当使用。合理设计这种装置对经济地延长木材的使用寿命至关重要。在各种木材保存技术中，压力法是当今世界上最持久的技术。在全细胞过程中，木材在加压期间被允许吸收尽可能多的液体化学物质，从而在处理区域留下最大浓度的防腐剂。通常，在这个过程中使用防腐盐的水溶液，但也可以用油浸渍木材。通过改变溶液的强度来达到所需的保留。在KUET机械工程系设计并建造了一套全室压力木材防腐系统，并对其性能进行了测试。压力筒使用当地可用的材料建造，并测量了木材的不同物理特性。据观察，木材的重量减少，由于水分的损失，密度，保留，渗透到木材防腐剂，由于压力在圆柱体。穿透在整个表面上或多或少是均匀的。
Wood, being a biological product, is liable to deterioration unless it is properly protected. The main reasons of deterioration of timber in service are decay due to fungal infection, attack by insects (borers and white ants), marine organisms and fire. Protection of wood is carried out from these agents by using preservative which can properly be used by proper design of preservation plant. Proper design of such plant is very essential to increase the lifespan of wood economically. Among the various wood preservation techniques, pressure processes are the most permanent technique around the world today. In the Full cell process, wood is allowed to absorb as much liquid chemicals as possible during the pressure period, thus leaving the maximum concentration of preservatives in the treated area. Usually, water solutions of preservative salts are employed with this process but it is also possible to impregnate wood with oil. The desired retention is achieved by changing the strength of the solution. A Full cell pressure wood preservation system was designed and constructed in Mechanical Engineering Department of KUET and its performance was tested. The pressure cylinder was constructed using locally available materials and different physical properties of wood were measured. It was observed that the weight of wood reduces due to loss of moisture, density, retention, penetration of preservatives into wood due to pressure in the cylinder. The penetration is more or less uniform throughout the surfaces.